Osma UltraRib System:

Transcription

1 Uniclass EPI JR12 L21721 P7114 J344 X725 I/Sf (52.3) In6 June 2014 UR102 Osma UltraRib System: Product and Installation Guide Solutions for Essentials

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3 ontents Introduction The Osma UltraRib System 4 Material 4 Standards 4 cceptance 4 Pipe Technology and Joint Design 5 General Information 6 Product Range Pipe Weights, Pipe and Socket Dimensions 7 Product Selector 8-20 Resources and Planning 21 Installation Transport 21 Handling 21 Storage 22 Installation Notes 23 Excavation 23 edding ackfill Sequence 25 Pipe Protection Jointing 27 Inspection hambers 450mm dia Inspection hambers 500/600mm dia Road Gully 33 onnections to Other Materials Slip Junctions Testing 38 Safety 38 Maintenance 38 Notes 39 info@osma.co.uk 3

4 Introduction 1. The Osma UltraRib System Osma UltraRib is a fully socketed system of pipe and fittings which combines secure jointing with ease of installation. The pipe has a smooth inner surface and externally has a repeating pattern of concentric ribs which gives the pipe its exceptional axial rigidity and enhanced radial strength. Osma UltraRib pipe and fittings are offered in 150mm, 225mm and 300mm diameters. Pipe is manufactured to S EN in addition complies with the requirements of: Water Industry Specification (WIS) JULY 2000: Issue 1 and Kitemarked under the SI ertification Scheme. The majority of Osma UltraRib fittings are covered by a ritish oard of grément ertificate. 1.1 Joint Design Osma UltraRib joints are made by placing the sealing ring between the second and third external reinforcing ribs nearest the spigot end of the pipe, which is then inserted into a socket.the result is a high performance, watertight joint with two added benefits: No chamfering of the pipe ends. Ring displacement during installation is impossible. 1.2 Fitting Design The majority of Osma UltraRib fittings are socketed to provide total flexibility in use and to reduce installation time on site. The sockets of the components are specially designed to allow the pipe and socket of the fitting to move as one, should differential settlement occur. 2. Material The strength and performance qualities of PV-U, PP and PE have been studied for a number of years to assess the material s long-term characteristics. Research has proven their suitability for the manufacture of large diameter drainage and sewerage systems, since they become an intrinsic part of the ground during settlement. This fact paved the way for a new development in pipe technology, not only in terms of manufacturing but also in the structural properties of the pipe itself i.e. Osma UltraRib. 3. Standards! ritish Standards institution Osma UltraRib pipe complies with the following requirements and is Kitemarked: S EN Plastics piping systems for non-pressure underground drainage and sewerage Water Industry Specification (WIS) July 2000: Issue 1 $ ritish oard of grément Osma UltraRib systems have been awarded the following certificates: 10/H151 UltraRib HPS Roads & bridges Highway drainage System 15mm, 225mm and 300mm. 98/3472 UltraRib Gravity Sewerage System 150mm, 225mm and 300mm. 14/H214 UltraRib & TwinWall Road Gullies. 4. cceptance Osma UltraRib systems are included in the following publications:- Sewers for doption, 6th, 6 and 7th Editions, under its generic name of; Thermoplastic Structured Wall Sewer Pipe. ivil Engineering Specification for the Water Industry, under its generic name of; Thermoplastic Structured Wall Sewer Pipe. Specification for Highway Works, series 500 Drainage and Service Ducts. 4 ustomer Services: Technical dvice:

5 Pipe Technology and Joint Design External reinforcing ribs give exceptional axial rigidity and radial strength The unique UltraRib high performance joint oncentric external reinforcing ribs Elastomeric Sealing Ring Improved hydraulic flow due to the smooth interchange between pipe and fittings 5

6 General Information 5. General information 5.1 pplication Osma UltraRib systems are designed for use in gravity drainage and sewerage installations at depths of up to 10 metres. daptors and Reducers are available for connection to traditional materials. 5.2 Descriptions Descriptions and illustrations in this publication are for guidance only. The fittings illustrated are generally typical of the Osma UltraRib 150mm sizes. No responsibility can be accepted for any errors, omissions or incorrect assumptions. Refer to the product itself if more detailed information is required. Due to the continuing programme of product improvement the ompany reserves the right to amend any published information or to modify any product without prior notice. 5.3 Dimensions Unless otherwise stated all dimensions are in millimetres (mm). 5.4 Symbols a) ritish Standard Kitemark! Identifies pipes and fittings which are manufactured under the.s.i. ertification Scheme. b) ritish oard of grément $ Identifies non-kitemarked fittings which are covered by a ritish oard of grément ertificate. 5.5 Materials a) Pipes and Fittings ll pipe is manufactured from unplastized Polyvinyl hloride (PV-U). Fittings are either manufactured from Polypropylene (PP) or PV-U. Polyethylene (PE) is used for the range of Road Gullies. b) Sealing Rings Osma UltraRib Sealing rings are manufactured from Ethylene Propylene Diene Monomer (EPDM) complying with the requirements of S EN olour Most pipe and fittings Golden rown Ring Seals lack 5.7 Sealing rings Sealing Rings are supplied either loose with pipes and fittings or pre-fixed in the case of Inspection hambers and are included in the price. 5.8 Supply ll Osma UltraRib systems are supplied through a nationwide network of merchant distributors. For further information contact ustomer Services on Technical advice The Osma UltraRib System is backed by Wavin s comprehensive technical advise service. This is available to provide expert assistance at every stage of a project, from planning and product selection to installation and maintenance. ontact Wavin Technical Design Department: Tel: technical.design@wavin.co.uk or via online enquiry at wavin.co.uk 5.10 Literature The following Wavin publications are also available from the Literature Department at hippenham. Wavin elow Ground & ivils Systems. Wavin quaell Systems: Product and Installation Guide. Osma elow Ground Product and Installation Guide. Wavin Non Man Entry Inspection hamber Range: Product and Installation Guides. To request details with regards to any of the above components and/or for any technical enquires please contact: Literature Request Tel: literature@wavin.co.uk Technical Design Tel: technical.design@wavin.co.uk Wavin Online The complete range of Wavin/Osma product and installation guides are also available online at: wavin.co.uk 6 ustomer Services: Technical dvice:

7 Pipe Weights, Pipe and Socket Dimensions Pipe weights and dimensions The following pages illustrate the 150mm, 225mm and 300mm Osma UltraRib range of underground gravity drainage and sewerage pipes, fittings and accessories. numbers, descriptions, dimensions and weights of pipe are included. The Osma UltraRib range of pipes comply with the requirements of S EN and are Kitemarked in accordance with the SI certification scheme. Osma UltraRib pipe is supplied in three diameters, 150mm, 225mm and 300mm, either plain ended or single socketed and in standard lengths of either 3 or 6 metres. Table 1. Pipe weights Plain Ended (P/E) Length (m) Single Socket (S/S) Weight (kg/m) UR UR UR073 Length (m) Weight (kg/m) UR UR UR UR UR043 Table 2. Pipe and Socket Dimensions Plain Ended Pipe (P/E) OD ID OD ID Single Socketed Pipe (S/S) OD OD Osma UltraRib Socket OD OD info@osma.co.uk 7

8 Product Selector Product selector The Product Selector lists the range of pipes and fittings detailed in the Product Range. bbreviations P/E Pipes and Fittings with both ends plain or with one plain end and one special end. D/S Fittings with ring-seal or push-fit sockets at all ends. S/S Pipes and Fittings with one or more ring-seal or push-fit sockets, but always one plain or special end. Table 3. Product selector Product Description Pipe Plain Ended (P/E) 3 metre o o o Single Socket (S/S) 3 metre o o o Single Socket (S/S) 6 metre o o Rocker Pipe S/S Rocker Pipe 600mm effective length o o o ouplers D/S Slip oupler o o o D/S Pipe oupler o o o daptors D/S daptor to lay or oncrete Spigot o o o D/S daptor to thinwall lay Spigot o S/S daptor 6UR Socket x 160mm S EN 1401 Spigot o D/S daptor 6UR Socket x 160mm S EN 1401 Socket o S/S daptor 6UR Spigot x 160mm S EN 1401 Socket o Level Invert Reducers S/S Reducer to OsmaDrain S EN 1401 Spigot o S/S Reducer to UltraRib Spigot o o Short Radius ends D/S 87½ 6UR Socket x 160mm S EN 1401 Socket o D/S 87½ o o o S/S 45º o D/S 45 o o o D/S 30 o o o D/S 15 o o o Junctions D/S Equal 87½ to UltraRib Spigot o D/S Equal 45 to UltraRib Spigot o o o D/S Unequal 87½ to S EN 1401 Spigot o D/S Unequal 45 to S EN 1401 Spigot o o o D/S Unequal 45 to UltraRib Spigot o o D/S Unequal Slip Junction 45 to UltraRib Spigot o o Sealed Rodding ccess Fittings P/E Screwed ccess over o S/S Screwed ccess over o Socket Plug P/E Socket Plug o o o Non Man-Entry Inspection hambers D/S Equal hamber 450mm diameter o D/S UnEqual hamber 450mm diameter o D/S Equal hamber 500mm diameter o D/S UnEqual hamber 500mm diameter o D/S Equal hamber 600mm diameter o o o Road Gully S/S Road Gully 450mm diameter x 900mm invert o S/S Road Gully 450mm diameter x 750mm invert o Spares Ring Seal o o o ccessories Joint Lubricant Suitable for use with all sizes Inflatable Testing Plug o 8 ustomer Services: Technical dvice:

9 Product Selector Plain Ended Pipe P/E Pipe 3 metre Material: PV-U 150 6UR073 $! 225 9UR073 $! UR073 $! Single Socketed Pipe S/S Pipe 3 metre Material: PV-U S/S Pipe 6 metre Material: PV-U 150 6UR043 $! 225 9UR043 $! UR043 $! 150 6UR046 $! 225 9UR046 $! Rocker Pipe S/S Rocker Pipe 600mm effective length Material: PV-U 150 6UR869 $! UR869 $! UR869 $! ouplers D/S Slip oupler for new branch entry connections and repairs Material: * PV-U PP 150 * 6UR105 $ UR105 $ UR105 $ 325 D/S Pipe oupler for jointing pipe Material: * PV-U PP 150 * 6UR205 $! UR205 $! UR205 $! info@osma.co.uk 9

10 Product Selector daptors D/S daptor to clay or concrete spigot Material: EPDM (min) (max) 150 6UR106! UR109! UR112! D/S daptor to thinwall clay spigot Material: PV-U 150 6UR129 $ S/S daptor 6UR socket x 160mm S EN 1401 spigot Material: PV-U 150 6UR141 $ D/S daptor 6UR socket x 160mm S EN 1401 socket Material: PV-U 150 6UR142 $ S/S daptor 6UR spigot x 160mm S EN 1401 socket Material: PV-U 150 6UR143 $ ustomer Services: Technical dvice:

11 Product Selector Reducers S/S Level Invert Reducer to OsmaDrain S EN 1401 spigot Material: PV-U 150 x 110 6UR099 $ Level Invert Reducer to UltraRib spigot Material: PP 225 x 150 9UR095 $ x UR093 $ Short Radius ends D/S Short Radius end 87½ 6UR socket x 160mm S EN 1401 socket Material: PV-U 150 6UR D/S Short Radius end 87½ Material: * PV-U PP 225/300mm bend are long radius 150 * 6UR561 $ UR561 $ UR561 $ S/S Short Radius end 45 Material: PV-U 150 6UR163 $ info@osma.co.uk 11

12 Product Selector Short Radius ends ontinued... D/S Short Radius end 45 Material: * PV-U PP 150 * 6UR563 $ UR563 $ UR563 $ D/S Short Radius end 30 Material: * PV-U PP 150 * 6UR566 $ UR566 $ UR566 $ D/S Short Radius end 15 Material: * PV-U PP 150 * 6UR567 $ UR567 $ UR567 $ Equal Junctions D/S Equal Junction - 87½ to UltraRib spigot Material: PV-U 150 6UR193 $ D/S Equal Junction 45 to UltraRib spigot Material: * PV-U PP 150 * 6UR213 $ UR213 $ UR213 $ ustomer Services: Technical dvice:

13 Product Selector Unequal Junctions D/S Unequal Junction 87½ to S EN 1401 spigot Material: PV-U 150 x 110 6UR199 $ D/S Unequal Junction 45 to S EN 1401 spigot Material: * PV-U PP 150 x 110 * 6UR219 $ x 110 9UR x 160 9UR x UR D/S Unequal Junction 45 to UltraRib spigot Material: * PV-U PP 225 x 150 * 9UR227 $ x UR237 $ x UR240 $ Slip Junction D/S Unequal Slip Junction 45 to UltraRib spigot Material: PV-U 225 x 150 9UR x UR info@osma.co.uk 13

14 Product Selector Sealed Rodding ccess Fittings P/E Screwed ccess over llows full bore access to the sewerage system for cleaning, fits in to a standard UltraRib socket Material: PV-U 150 6UR292 $ S/S Screwed ccess over llows full bore access to the sewerage system for cleaning, fits on to a standard UltraRib spigot Material: PV-U 150 6UR290 $ Screwed ccess Fittings P/E ccess over llows full bore access to the sewerage system for cleaning, fits in to a standard UltraRib socket Material: PV-U / PP 150 6UR296 $ UR296 $ UR296 $ ustomer Services: Technical dvice:

15 Product Selector Inspection hambers 450mm dia. Inspection hamber Range, 450mm dia. is Kitemarked to SEN ,when used in adoptable and non-adoptable areas, maximum invert depth is 1.2 metres. D D/S Equal Inspection hamber ase straight channel with two 90 branches (left and right) E 450mm dia. base incorporating 150mm straight channel and F 3 x 150mm inlets including 2 x 90 equal branch inlets For use with 150mm UltraRib Supplied with 1 blank-off plug for unused side entry D E F* 150 6UR928! *Dimension F = height at centre point of base (all bases have a 15 inlet-to-outlet fall) D D/S UnEqual Inspection hamber ase straight channel with four branches (two left, two right) E 450mm dia. base incorporating 150mm straight channel and 4 x 110mm inlets including 2 x 45 and 2 x mm branch F inlets For use with 150mm UltraRib Supplied with 3 blank-off plugs for unused side entries D E F* 150 6UR929! *Dimension F = height at centre point of base (all bases have a 15 inlet-to-outlet fall) Shaft P/E Inspection hamber Shaft 450mm dia. plain-ended shaft. Length: 305mm For use with all 450mm dia. Inspection hamber ases Supplied with pre-fitted elastomeric seal **Dimension = effective height ** 450 4D info@osma.co.uk 15

16 Product Selector over & Frame Options Round over & Frame 125 (ductile iron) For medium duty loaded locations D For loadings up to 125kN (12.5 tonnes) when frame is supported by a concrete plinth Square over & Frame 15 (polypropylene) D 4D942! Used with 4D975 shaft for lightly-loaded locations For loadings up to 15kN (1.5 tonnes) D Integral 350mm restricted ccess for depths >1.2 meters an be suitable for loadings up to 50kN (5.0 tonnes) when frame is supported by a concrete plinth Round over & Frame 15 (polypropylene) D*** 4D920! Used with 4D975 shaft for lightly-loaded locations D For loadings up to 15kN (1.5 tonnes) Integral 350mm restricted ccess for depths >1.2 meters Round over & Frame 15 (polypropylene) D*** 4D924! Used with 4D975 shaft for lightly-loaded locations D For loadings up to 15kN (1.5 tonnes) Square Recessed over & Frame (steel cover/polypropylene frame) Used with 4D975 shaft D*** 4D927! For loadings up to 25kN (2.5 tonnes) when frame is supported by a concrete plinth (external use only) Square Recessed over & Frame (steel) 4D Used with 4D975 shaft Sealed For loadings up to 25kN (2.5 tonnes) when frame is supported by a concrete plinth Suitable for internal use 4D ***Dimension D = fully inserted 16 ustomer Services: Technical dvice:

17 Product Selector Inspection hambers 500mm dia. Inspection hamber 500mm dia. is Kitemarked to S 7158, when used in adoptable areas maximum invert depth is 1.2 meters, when used in non-adoptable areas, maximum invert depth is 3 meters. D E D/S Equal Inspection hamber ase 150mm straight channel with two 150mm x 90 left/right hand branch entries F For use with 150mm UltraRib components Supplied complete with a base to shaft sealing ring and 1 blank-off plug for use in unused side entries D E F* 150 6UR936! *Dimension F = height at centre point of base (all bases have a 15 inlet-to-outlet fall) D D/S UnEqual Inspection hamber ase E F 150mm straight channel with two 110mm x 45 and two 110mm x 90 left/right hand branch entries, for use with 110mm components For use with 150mm UltraRib components Supplied complete with a base to shaft sealing ring and 3 blank-off plugs for use in unused side entries D E F* 150 6UR937! *Dimension F = height at centre point of base (all bases have a 15 inlet-to-outlet fall) Shaft P/E Inspection hamber Shaft 500mm diameter for use with all types of 500mm dia. hamber ases D934! D938! Restriction ccess ap Restriction ccess ap For use with 6D934/938 shaft sections, restricts access to 350mm, supplied with one 500mm sealing ring 500 6D930! hamber ase/restriction ccess ap Seal spare 500mm diameter for use with 6D934/938 shaft sections and 6D930 restriction access cap 500 6D917! info@osma.co.uk 17

18 Product Selector Inspection hambers 600mm dia. E Inspection hamber 600 dia is Kitemarked to S EN , when used in either adoptable or non-adoptable applications, its maximum invert depth is 3 meters. D/S Equal Inspection hamber ase a straight channel only 600mm dia. base straight channel and single inlet F For use with 150mm, 225mm and 300mm UltraRib lso for connection to 150mm, 225mm and 300mm TwinWall D using daptors 6TW145 (with150 ase), 9TW145 (with 225 ase) or 12TW145 (with 300 ase) D E F NE NE NE E D/S Equal Inspection hamber ase a bent 90 channel only 600mm dia. base incorporating bent 90 channel and single inlet F For use with 150mm, 225mm and 300mm UltraRib lso for connection to 150mm, 225mm and 300mm TwinWall D using daptors 6TW145 (with150 ase), 9TW145 (with 225 ase) or 12TW145 (with 300 ase) D E F NE NE NE E D/S Equal Inspection hamber ase a bent 30 channel only 600mm dia. base incorporating bent 30 channel and single inlet F For use with 150mm, 225mm and 300mm UltraRib lso for connection to 150mm, 225mm and 300mm TwinWall D using daptors 6TW145 (with150 ase), 9TW145 (with 225 ase) or 12TW145 (with 300 ase) D E F NE NE NE ustomer Services: Technical dvice:

19 Product Selector Inspection hambers 600mm dia. D/S Equal Inspection hamber ase a straight channel with two 90 branches (left and right) 600mm dia. base incorporating straight channel and three inlets E including 2 x 90 equal branch inlets For use with 150mm, 225mm and 300mm UltraRib lso for connection to 150mm, 225mm and 300mm TwinWall F using daptors 6TW145 (with150 ase), 9TW145 (with 225 ase) or 12TW145 (with 300 ase) D D E F NE NE NE Shaft P/E Inspection hamber Shaft 600mm dia. plain-ended shaft. Length: 3 metres For use with all Range 600 bases ** NE ** Dimension = effective height Restriction ccess ap Restriction ccess ap For use with 60NE003 Restricts access to 350mm Supplied with one 600mm sealing ring NE hamber ase/restriction ccess ap Seal spare 600mm diameter for use with 60NE003 shaft and 60NE930 restriction access cap TW117 info@osma.co.uk 19

20 Product Selector Road Gully S/S Trapped Road Gully 450mm diameter x 900mm deep Material: PE D S/S Trapped Road Gully 450mm diameter x 750mm deep Material: PE D 150 6UR600 $ D 150 6UR590 $ Spares Ring Seal Spare, standard UltraRib socket Material: EPDM 150 6UR UR UR117 ccessories Jointing Lubricant Soluble Lubricant 2.5 kg tub 6UR kg tub 6UR396 Inflatable Testing Plug 150 6UR ustomer Services: Technical dvice:

21 Resources and Planning, Transport and Handling Resources and planning The main contractor, or sub-contractor, needs no special equipment or power. Handling When unloading block bundles mechanically, lways be careful to avoid damage when handling pipe. old weather reduces the impact strength of PV-U, so take extra care when handling pipe in wintry conditions. use either nylon belt slings or fork lift trucks with smooth forks. Metal slings, hooks or chains must not come into direct contact with the pipe. ontractors are responsible for checking Load and unload loose pipes by hand and layout drawings to ensure they are correct avoid using skids. so that expensive site alterations do not have to be made after laying. UltraRib pipes are manufactured from PV-U and are about one tenth the weight of equivalent traditional pipes (See Figure. 1). Nevertheless, care must be taken during transportation, handling and storage. Transport lock bundles Table 4. Pipe weights Pipe of 3m/6m lengths per bundle height width Weight per bundle (kg) 3m 6m Figure 1. UltraRib PV-U is approximately one tenth the weight of traditional pipes Generally, pipes are delivered pre-packed in block bundles of standard quantities. In these bundles, pipes are held by straps and timber stretchers. Loose pipes and fittings When vehicles with a flat bed are used for transporting loose pipes, make sure the bed is free of nails and other projections. Support pipes throughout their length. Load pipes so that they do not overhang the vehicle by more than one metre. lways load pipes with larger diameters and thicker walls before those of smaller diameters and thinner walls. Osma UltraRib pipes should always be lifted off the vehicle, not dragged, thus avoiding damage Figure 2. Loading block bundles on to flat bed vehicle to the ribs. Make sure vehicles have adequate side supports at approximately 2 metre spacings, and that all uprights are flat, with no sharp edges. Secure pipes during transit. Fittings are supplied in cardboard boxes or plastic bags. info@osma.co.uk 21

22 Storage Storage Loose pipes Store loose pipes on a reasonably flat lock undles surface free of sharp projections. Provide Stack pipes of different size and wall thickness separately. If this is not possible, stack pipes with larger diameters and thicker walls under those with smaller diameters and Store block bundles on a reasonably flat side supports at least every 2 metres. surface free from sharp projections likely to These supports should preferably consist of damage the pipes. battens at least 75mm wide (See Figure. 3). lock bundles can be stored up to three Ideally, loose pipes should be uniformly high without extra side supports or bearers. supported throughout their entire length. If In addition, block bundles will remain free this is not possible, place timber supports Do not stack pipes more than seven layers standing when cut. at least 75mm wide at 1 metre maximum in height or above a maximum height of Take care when removing pipes from centres beneath the pipes (See Figure. 4). 2 metres. bundles as the straps are under considerable thinner walls. Socketed pipes should be stacked with the sockets protruding and placed at alternate ends. Fittings tension and may flail when cut. Store fittings supplied in plastic bags away from direct sunlight. If fittings have to be stored outside in their Figure 3. Storage of loose pipes on the ground plastic bags, open the bags to prevent a build-up of temperature. The above storage requirements apply to 2m or 7 layers max. the United Kingdom climatic conditions. In tropical climates reduce the stack height and store pipes and fittings under cover or in the shade. Sealing rings Sealing Rings for the majority of UltraRib fittings are supplied loose. The rings should be stored in their original packaging away from strong sunlight or weathering. They should never be placed on the ends of the 2m pipes which are being stored. Figure 4. Storage of loose pipes on bearers 1m spacing maximum 75mm bearing width 22 ustomer Services: Technical dvice:

23 Installation Notes, Excavation and edding Installation notes The information included on this page is based on the recommendations given in S : 1989, S EN 1610: 1998, S EN 752: 2008, Sewers for doption, 6th, 6 and 7th Editions and ritish oard of grément ertificates: 98/3472 and 10/H151. edding and backfill must be of the correct specification. Excavated as-dug material may be suitable. (See S EN 1610 and S 8000: 14). Excavation It is important to take precautions against trench collapse. Do not open trenches too far in advance of pipe laying. Support the sides of trenches that are deeper than 1.2 metres. Keep trench widths as narrow as practicable but not less than 300mm wider than the pipe diameter, i.e. 150mm clear each side of the pipe to allow proper compaction of the sidefill. Table 5. Processed granular bedding and sidefill materials for flexible pipes. Pipe ore (mm) edding Osma UltraRib pipes laid on trench bottom Where the as-dug material is suitable*, the bottom of the trench may be trimmed to form the pipe bed (See Figure. 5). *Suitable material is defined as granular maximum particle size (mm) Over 150 to Figure 5. Osma UltraRib pipes laid on trench bottom Material Specification see Note 10,14 or 20mm nominal single size or 14mm to 5mm graded or 20mm to 5mm graded Note ggregates conforming to S EN or lightweight aggregates conforming to S EN are suitable as processed bedding and sidefill materials. material in accordance with the recommendations of S EN 1610 and S Small depressions should be made to accommodate pipe or fitting socket. fter the pipe has been laid these should be filled carefully ensuring that no voids remain under, or around, the sockets. Excavation for Manholes and Inspection hambers dditional excavation is necessary for: Traditionally constructed manholes Osma UltraRib 450mm diameter Inspection hambers need no additional excavation other than that required for normal drain laying. Sidefill s-dug backfill Trench bottom trimmed and loosened to form bed info@osma.co.uk 23

24 edding continued When the formation is prepared, the pipes should be laid upon it true to line and level within the specified tolerances. Each pipe should be checked and any necessary adjustments to level made by raising or lowering the formation, ensuring that the pipes finally rest evenly on the adjusted formation throughout the length of the barrels. djustment should never be made by local packing. When the formation is low and does not provide continuous support, it should be brought up to the correct level by placing and compacting suitable material. Osma UltraRib pipes laid on processed granular bedding 29 When the as-dug material is not suitable, a layer of suitable processed granular material must be spread evenly on the trimmed trench bottom. The trench should be excavated to allow for the thickness of granular bedding under the barrels. The trench formation should be prepared, the bedding placed and the pipes laid in accordance with S EN 1610 and S 8000: 14. Figure 6. Osma UltraRib pipes laid on 50mm minimum of processed granular material Where the backfill above the pipe contains stones larger than 40mm or where the pipework is deeper than 2m in poor ground, the processed granular material should extend to at least 100mm above the pipe crown First 300mm of back selected to be free from stones exceeding 40mm (unless processed granular material extends 100mm above pipe crown) Minimum 150mm side fill Minimum 50mm of processed granular bedding Figure 7. Osma UltraRib pipes laid on 100mm minimum of processed granular material First 300mm of back selected to be free from stones exceeding 40mm (unless processed granular material extends 100mm above pipe crown) Osma UltraRib pipes laid on a 50mm minimum processed granular bed In the case of 150mm Osma UltraRib pipes, where the as-dug material can be hand trimmed by shovel and is not puddled when walked upon, a 50mm depth of bedding material may be used. In this case the material must be nominal 10mm single-sized aggregate (See Figure. 6). Osma UltraRib pipes laid on a 100mm minimum processed granular bed Where the as-dug material cannot be hand trimmed by shovel and is puddled when walked upon, or, when pipes are to be laid in rock, compacted sand or gravel requiring mechanical means of trimming, or, in very soft or wet ground, the bedding should be a minimum of 100mm of processed granular material in accordance with Table 2 (See also Figure. 7). Where the backfill above the pipe contains stones larger than 40mm or where the pipework is deeper than 2m in poor ground, the processed granular material should extend to at least 100mm above the pipe crown Minimum 150mm side fill Minimum 100mm of processed granular bedding 24 ustomer Services: Technical dvice:

25 ackfill Sequence and Pipe Protection ackfill sequence 1. Place suitable sidefill material evenly on each side of the pipe in 100mm layers. Pay particular attention to the area under the lower quadrants of the pipe. Hand tamp well at each layer up to the pipe crown. Leave the pipe crown exposed. 2. If as-dug material is free from stones exceeding 40mm, imported processed granular material is not needed above the pipe crown (See Figure. 6). over the pipe crown with a minimum of 300mm of compacted as-dug material. If as-dug material contains stones larger than 40mm, or the pipe is deeper than 2 metres in poor ground, extend the processed granular material for at least 100mm above the pipe crown. 3. In both cases, hand tamp the material fully at the sides of the pipe while tamping lightly over the crown. ontinue hand tamping until a finished layer of 300mm, 225mm in adoptable situations, has been placed over the pipe. 4. s-dug material may be backfilled in 300mm/225mm layers and mechanically tamped. Dumpers or other vehicles must not be driven along the pipe tracks as a means of compacting. Surround vertical or steeply raking pipes with 150mm bedding material, suitably tamped up to the invert level of the incoming pipe (ackdrops) or to ground level. Then backfill as above. Pipe protection s PV-U pipes are flexible they can accommodate a degree of ground movement and pressure without damage. However, if the pipe needs protection the following recommendations should be followed:- Traffic free areas In areas where no loading is expected (e.g. in gardens) pipes at depths less than 0.6 metre, should, where necessary, be protected against risk of damage from garden implements, for example by placing over them a layer of concrete paving slabs with at least a 75mm layer of suitable material between pipe and slab. Public highways / adoptable situations In areas where loading is expected, pipes laid at depths less than 0.9 metre below the finished surface of a road, (1.2m in adoptable situations) should be protected with a concrete slab of suitable strength extending the full width of the trench (See Figure. 9) or alternatively surrounded in concrete (See Figure. 10). oncrete of suitable strength or the requirement for reinforced concrete to be determined by the engineer or adopting authority. The normal maximum depth for all installations is 10 metres. Figure 8. Pipe Protection in Traffic Free reas concrete paving slabs oncrete paving slabs info@osma.co.uk 25

26 Pipe Protection continued Figure 9. Pipe Protection concrete slab Use of concrete If pipes are to be surrounded with concrete, make sure they do not float when the concrete is poured. Filling the pipes with water will Road onstruction generally provide enough ballast but side restraint may be needed to maintain alignment. Less than 1.2m Min. 150mm 200mm 150mm 150mm 200mm 150mm 100mm 150mm oncrete slab of suitable strength (reinforced if necessary) To maintain a certain degree of flexibility, insert 18mm compressible material, such as fibreboard or polystyrene, around the pipe joints (See Figure. 10). These boards must be at least the width of the concrete surrounds. Pipes penetrating walls Where a short length of pipe is to be built into a structure, a suitable wall protection sleeve, complete with couplers placed within 150mm of the wall face should be used. The length of the next rocker pipe should not exceed 0.6 metre. This will compensate for any settlement of the building or made up ground. lternatively, where it is not necessary for a pipe to be built into a structure, the provision of a lintel, relieving arch or sleeve may be used, leaving a gap of not less than 50mm around the pipe. Effective means should be adopted to prevent the entry of gravel, rodents or gases. Figure 10. Pipe Protection concrete surround 18mm compressible board 150mm concrete surround of suitable strength placed in one operation 26 ustomer Services: Technical dvice:

27 Jointing Jointing Unlike traditional methods for jointing PV-U systems, the UltraRib method is unique and innovative, since the ring seal is positioned over the pipe spigot rather than being retained within a pipe or fitting socket (See Figure. 12). The major advantages of the UltraRib jointing method are: i. There is no need to chamfer pipe ends The force required to push the pipe home will vary according to pipe size and ambient temperature. Whatever method is used to apply the neccessary force, care must be taken to ensure that there is no risk of damaging the pipe ends. The most convenient method is to use a lever ensuring the pipe end is protected (See Figure. 14). Figure 11. orrect cutting position good technique is to lift the pipe up by passing a rope underneath (See Figure. 15). This makes it easier to align the spigot into the socket. Mechanical pulling or pushing methods are unnecessary. Figure 12. UltraRib Sealing Ring ii. iii. The ring seal cannot be displaced during jointing The design of the joint ensures a flush fit between the internal bore of the pipe and the fitting thus increasing its hydraulic performance Preparation Ensure that the two ribs that retain the sealing ring are sound. utting Pipe must be cut midway between the ribs. The design of the ribs allows the pipe to be cut square using a coarse toothed saw (See Figure. 11). Jointing sequence 1. lean pipe spigots and sockets. ll dust, dirt and grit which could prevent an effective seal must be removed from pipe ends and sockets. 2. The correct position for the sealing ring is indicated in Figure. 12, ie between the second and third ribs from the pipe end. Ensure the ring seal is correctly seated and not twisted. 3. Lubricant should be applied to the whole of the inside of the socket (See Figure. 13). 4. To make the joint, offer up the pipe to the socket, align pipe and push home. lignment is important to facilitate jointing. Figure 13. pplying the lubricant Figure 15. ligning spigot into socket Figure 14. Protecting the pipe end Figure 16. Section through pipe joint info@osma.co.uk 27

28 Inspection hambers 450mm dia. Typical installation of a 450mm dia. Inspection hamber NOTE: The following is a summary of installation procedures. Inspection hambers may be installed in the same minimum trench width as required for standard 150mm drainage pipework. NO extension of trench width is required. ll elements are lightweight: may be handled/installed by a single person. Preparation Prepare and compact 100mm regulating bed of as dug or granular material in trench bottom. DI over and Frame 4D942 S EN Medium Duty ar surface 150mm deep concrete collar 4D975 Inspection hamber Shaft ompacted backfill as dug if suitable, or granular material Positioning/connection Position ase on regulating bed. heck outlet is facing in the correct direction. Ensure all inlets/outlet are free from dirt or grit. Use standard jointing sequence to connect 150mm Osma UltraRib and/ or 110mm OsmaDrain pipes to inlets/ outlet NOTE: The main through channel MUST be used. ends up to 45 may be used on any inlet or outlet. Push blank-off plugs externally into any unused outlet(s). Preparing shaft lean inside of ase socket and lubricate this entire area. Position first shaft section into ase socket. Vertically push home manually. Push-fit further shaft sections as required for invert depth. Ensure inside of each shaft section is pre-lubricated. ut final shaft section to approximate required height, using a fine-toothed saw. (Use external rings as cutting guides). Figure 17. Typical installation detail ackfill trench efore starting backfill, cover top of shaft to prevent ingress of dirt or grit. Select suitable sidefill use as dug. If not appropriate, use suitable granular material, similar to bedding material. void knocking shaft during backfilling and keep free of debris. ackfill to formation level. Then trim shaft to required height using fine-toothed saw. NOTE: If finished ground level is not yet known, leave shaft proud of surface and keep open end covered until final completion. 150mm Osma UltraRib Granular bedding material 6UR929 Inspection hamber ase 28 ustomer Services: Technical dvice:

29 Inspection hambers 450mm dia. over and frame: installation into 450mm dia. Inspection hamber Shaft For green areas and pedestrian areas NOT* subject to vehicle loading (See Figure. 18) EXMPLE: domestic gardens PP Square over and Frame 4D920 secured to shaft Trim shaft section at last stage of construction. Ensure unit is at correct height. Prepare selected over and Frame [4D920, 4D924 or 4D927] for installation into shaft. Position the cover and frame spigot into the shaft section. Fix frame to shaft using self-tapping screws. *For 15 applications subject to occasional loading up to 15kN (1.5 tonnes) (See Figure. 19) Figure 18. Installation detail green areas (non-loaded) 4D975 Inspection hamber Shaft ompacted backfill as dug if suitable, or granular material PP Square over and Frame 4D920 secured to shaft Path/patio 150mm deep concrete collar EXMPLE: domestic paths/patios Leave top 150mm of shaft clear of backfill. Lay 150mm thick slab of pre-cast or in situ concrete around top of shaft chamber. Prepare selected over and Frame [4D920, 4D924 or 4D927] for installation into shaft. Position the cover and frame spigot into the shaft section. Fix frame to shaft using self-tapping screws. For applications subject to occasional loading up to 25kN (2.5 tonnes) EXMPLE: domestic driveways Square Recessed overs and Frames [4D945] should also be installed with a concrete collar, as above (See Figure.20). For 125 applications subject to medium duty loading up to 12.5kN (12.5 tonnes) EXMPLE: dometic driveways/small car parks Trim shaft section at last stage of construction. Ensure unit is at correct height. Protect shaft from traffic loading by shuttering its external ribs. Lay 150mm thick slab of pre-cast or in situ concrete around top of shaft chamber with minimum opening 500mm x 500mm or 500mm diameter to ensure that any loads are distributed away from the shaft. 4D975 Inspection hamber Shaft ompacted backfill as dug if suitable, or granular material Figure 19. Installation detail 15 areas subject to occasional vehicle loading up to 15kN (1.5 tonnes) DI over and Frame 4D942 S EN Medium Duty ar surface Figure 20. Installation detail 125 areas subject to medium duty loading up to 125kN (12.5 tonnes) 150mm deep concrete collar 110mm OsmaDrain 100mm 4D975 Inspection bedding material hamber Shaft 4D.922 ompacted Universal backfill Inspection as dug if suitable, hamber ase or granular material ccording to required loading application, position Ductile Iron 125 over and Frame or D400 over and Frame on top of slab. 110mm OsmaDrain 100mm bedding material info@osma.co.uk D.922 Universal

30 Inspection hambers 500/600mm dia. Typical installation of 500/600mm dia. Inspection hamber NOTE: The following is a typical summary of the installation procedures required to install Osma 500/600mm dia Inspection hambers. For more specific advice see relevant Product and Installation Guide. Excavation Take precautions against trench collapse: support trench sides deeper than 1.2m. Preparation Prepare and compact 100mm regulating bed of granular material in trench bottom. Positioning/connection over & Frame lass 125 loading Driveway lass engineering bricks set in class 1 mortar 150mm deep concrete collar Shuttering to external cap Restrictor cap 600mm dia to 350mm dia 600mm dia Shaft Position ase on regulating bed. heck outlet is facing in the correct direction: i.e. with side inlets swept to follow water flow. ompacted backfill as-dug or granular bedding material Ensure all inlets/outlet are free from dirt or grit. Use standard jointing sequence to connect 150mm, 225mm or 300mm UltraRib pipes to inlets/outlet. For connection of TwinWall pipes in these sizes, use daptors 6TW145, 9TW145 or 12TW145 NOTE: The main through channel MUST be used. ends up to 45 may be used on any inlet or outlet. Figure 21. Typical installation: 600mm dia. Inspection hamber (Type 3) or, if required, with mechanical assistance (if so, protect top of shaft). 150mm, 225mm or 300mm dia Pipe Granular bedding material void knocking shaft during backfilling and keep free of debris. ackfill Using same material as bedding, backfill around ase in 150mm layers up to underside of shaft socket. Ensure inside of ase is free of debris. Preparing shaft ut corrugated shaft to approx. Invert depth of hamber. REOMMENDTION: leave extra 300mm depth to allow for possible final site changes. Locate sealing ring between 2 nd and 3 rd ribs from shaft bottom. Ensure ring is seated correctly/not twisted. lean inside of ase socket and lubricate this entire area. Position shaft at 45 angle into ase socket. Vertically push home manually ackfill trench efore starting backfill, cover top of shaft to prevent ingress of dirt or grit. Trafficked application (e.g. roadway) Follow Highway Specification: use Type 1 or similar backfill, and compact. Non-trafficked application (e.g. garden area) Use as-dug material (excluding stones >40mm dia., frozen or vegetable matter) in 300mm layers. Tamp mechanically around full circumference of ase so that current conditions re ground and water table, and anticipated future loading, can be supported. REOMMENDED SPD LEVELS: Green areas 90% Paved areas/limited traffic load 95% Roads/heavy traffic loads 98% ackfill to formation level. Trim shaft/fit restriction access cap Trim shaft to required height using fine-toothed saw. NOTE: If finished ground level is not yet known, leave shaft proud of surface and keep open end covered until final completion. When shaft trimmed to final height, locate sealing ring between 2nd and 3rd ribs from shaft top. Ensure ring is seated correctly/not twisted. Lubricate inside of 350mm restrictor cap, position over top of shaft, and push fully home. 30 ustomer Services: Technical dvice:

31 Inspection hambers 500/600mm dia. Typical installation guidance: 125 and D400 cover and frame For 125 Paved areas with limited traffic load and for D400 Roads with heavy traffic loads Trim shaft section at last stage of construction. Ensure unit is at correct height. Protect shaft from traffic loading by shuttering its external ribs. Lay 150mm thick slab of pre-cast or in situ concrete around top of shaft chamber with minimum opening for 500mm dia. hamber of 600mm x 600mm or 600mm dia. or minimum opening for 600mm dia. hamber of 750mm x 750mm or 750mm dia. to ensure that any loads are distributed away from the shaft. over & Frame lass 125/D400 loading Driveway lass engineering bricks set in class 1 mortar 150mm deep concrete collar Shuttering to external cap Restrictor cap 600mm dia to 350mm dia 600mm dia Shaft ompacted backfill as-dug or granular bedding material Figure 22. Installation detail for 125 loading: paved areas with limited traffic load; and for D400 loading: roads with heavy traffic loads On top of slab, construct lass engineering brickwork OR concrete blocks OR pre-cast concrete seating rings up to required height. ccording to required loading application, position Ductile Iron 125 or D400 over and Frame on top of slab. (See Figure.22). 150mm, 225mm or 300mm dia Pipe Granular bedding material info@osma.co.uk 31

32 Inspection hambers 500/600mm dia. Typical installation guidance: 500/600 dia. shaft backdrop connections over & Frame lass 125 loading Driveway lass engineering bricks set in class 1 mortar 150mm deep concrete collar Restrictor cap 600mm dia to 350mm dia 600mm dia Shaft ompacted backfill as-dug or granular bedding material 150mm, 225mm or 300mm dia Pipe Granular bedding material Figure 23. Installation detail typical backdrop situation Installation of backdrop connections chamber which has substantially different invert levels will require backdrop connection of one or more drains. This operation can be done externally on site. (See Figure.23) Use a combination of ackdrop Kit [NE950 or NE960], with associated 100/110mm or 150/160mm fittings, for in situ connection to 500/600mm dia. shafts, as follows: Drill required opening into corrugated shaft section at appropriate place Insert specially designed in-situ socket connector into the seal opening Lubricate the outside surface of the spigot pipe to be connected and insert into the socket connector Make remaining connections in the same way as for standard jointing of 110mm or 160mm pipes and or fittings lean and remove any swarf from the opening Install the special 110mm or 160mm seal into the opening Fully lubricate around the entire internal surface of the seal 32 ustomer Services: Technical dvice:

33 Road Gully Road Gully The Osma UltraRib Road Gully offers high impact resistance with light weight. series of external reinforcing ribs give the unit its strength and also act as anti-flotation collars during installation. Gully connection 150mm Osma UltraRib 1. lean gully socket and pipe spigot. ll dust, dirt and grit which could prevent an effective seal must be removed. 2. orrectly position the Osma UltraRib ring seal between the second and third ribs from the pipe end or on the spigot end of the Osma UltraRib S/S end 45 (6UR163), ensuring that the ring seal is correctly seated and not twisted. 3. Lubricate the whole of the inside of the gully socket. 4. Offer up the pipe or bend to the socket, align and push home. Installation of Road Gully 1. When excavating the Gully pit allow an additional 150mm under and around the unit. 2. Lay concrete base 750mm x 750mm x 150mm overall Set Gully in position and haunch in up to its second rib. 3. onnect the Gully to the branch drain in the appropriate way. 4. Pour 150mm of concrete around the Gully up to its lip. When surrounded by concrete as shown in Drawing No F13 of the DTP s Highway onstruction Details, the joints are fully watertight in accordance with the DTP s Specification for Highway Works: 2: lause Where required, build a brick or concrete kerb on top of the Gully to suit grating and frame. 6. ed the grating and frame in a suitable concrete mix (See Figure. 24). Figure 24. Osma UltraRib Road Gully typical installation ed the grating and frame in a suitable concrete mix and fix grating Pour 150mm of concrete around gully and up to its lip onnect gully to the branch drain in the appropriate way Lay a concrete base, set gully in position and haunch up to the second rib When excavating the gully pit, allow an additional 150mm under and around the unit info@osma.co.uk 33

34 onnections to Other Materials Materials The Osma UltraRib range offers a number of daptors which enables the system to be connected to both traditional and plastic systems. Osma UltraRib spigot to S EN 1401 socket Lubricate spigot end of daptor (6UR141) and insert into 160mm S EN 1401 Socket. Make Osma UltraRib connection in the normal way (see Figure 25 and Jointing, page 27). Osma UltraRib spigot to S EN 1401 spigot Ensure spigot end of the S EN 1401 pipe is clean cut, lubricate and push the ring seal end of the daptor (6UR142) fully on to the pipe withdrawing it by a minimum of 12mm. Make Osma UltraRib connection in the normal way (see Figure 26 and Jointing, page 27). Osma UltraRib socket to S EN 1401 spigot Ensure spigot end of the S EN 1401 pipe is cut clean, lubricate and push the ring seal end of the daptor (6UR143) fully on to the pipe withdrawing it by a minimum of 12mm. Make Osma UltraRib connection in the normal way (see Figure 27 and Jointing, page 27). Osma UltraRib spigot to thin-wall clay spigot Lubricate spigot end of clay pipe and push the ring seal end of daptor (6UR129) fully on to the pipe. Make Osma UltraRib connection in the normal way (see Figure. 28 and Jointing, page 27). Figure 25. onnection to S EN 1401 socket 150mm Osma UltraRib pipe 6UR141 Figure 26. onnection to S EN 1401 spigot 150mm Osma UltraRib pipe Figure 27. onnection to S EN 1401 spigot 150mm Osma UltraRib pipe UltraRib Socket Figure 28. onnection to thin-wall clay spigot 160mm OsmaDrain pipe 6D mm OsmaDrain pipe 6UR mm OsmaDrain pipe 6UR mm Osma UltraRib pipe 150mm clay pipe 6UR ustomer Services: Technical dvice:

35 onnections to Other Materials continued Figure 29. onnection to clay or concrete spigot 150mm Osma UltraRib pipe 6UR106 Figure 30. onnection to clay spigot 225mm Osma UltraRib pipe 9UR109 Figure 31. onnection to concrete spigot 300mm Osma UltraRib pipe 150mm clay pipe 225mm clay pipe 300mm concrete pipe Osma UltraRib spigot to clay/concrete spigot To join 150mm Osma UltraRib to either a 150mm lay/oncrete pipe use daptor (6UR106) if push-fit adaptors are unsuitable. Loosen stainless steel clamps, slide daptor on to end of the lay/oncrete pipe, tighten clamp. Insert Osma UltraRib pipe into opposite end, tighten clamp (see Figure. 29). Osma UltraRib spigot to clay spigot To join 225mm Osma UltraRib to a 225mm clay pipe use adaptor (9UR109). Loosen stainless steel clamps, slide daptor on to end of the lay pipe, tighten clamp. Insert Osma UltraRib pipe into opposite end, tighten clamp (see Figure. 30). Osma UltraRib spigot to concrete spigot To join 300mm Osma UltraRib to a 300mm oncrete pipe use daptor (12UR112). Loosen stainless steel clamps, slide daptor on to end of the oncrete pipe, tighten clamp. Insert Osma UltraRib pipe into opposite end, tighten clamp (see Figure. 31). 12UR112 info@osma.co.uk 35

36 Slip Junctions Slip Junctions Extension of existing Osma UltraRib system If the drainage system is likely to be extended in the future and this can be pre-planned, then install manholes and/or junctions with plugged sockets. Figure 32. Slip Junction, effective length 9UR229 However, if a new junction is required to be installed into an existing system then the Osma UltraRib range of 45 Slip Junctions should be used. Osma UltraRib Slip Junctions (9UR229 and 12UR239) are moulded from PV-U and therefore are lightweight but robust. The unit s unique design enables them to be used with minimum trench excavation and therefore substantially reduced reinstatement costs. Figure 33. Osma UltraRib Sealing Ring L Osma UltraRib pipe The units are simple to install by means of their unique sliding sockets, which combine secure jointing with ease of installation. Installation of Osma UltraRib Slip Junctions 1. Expose the existing pipe and cut out a length of pipe equal to the effective length of the Slip Junction in the closed position (see Figure. 32), i.e. 9UR229 L = 855mm 12UR239 L = 930mm 2. lean swarf and dirt from the pipe ends and correctly position the ring seals at the ends of both pipe spigots (see Figure. 33 and Jointing, page 27). Figure 34. Positioning of Slip Junction Osma UltraRib pipe 9UR229 Ring seal 3. pply lubricant to the inside of the sliding sockets and position slip Junction as shown within trench (see Figure. 34) ensuring that the junction and pipes are butted and aligned. 4. Slide both sockets over the pipe spigots, ensuring that the sockets are fully extended to reach the 5th rib on the pipe ends (see Figure. 35). Ring seal Figure 35. Installation of Slip Junction L 12UR239 Osma UltraRib pipe L 36 ustomer Services: Technical dvice:

37 Slip Junctions continued Figure 36. Osma UltraRib Slip Junction typical installation Slip Junction in closed position Slip Junction extended

38 Testing, Safety and Maintenance Testing ll lengths of the drain and all manholes and inspection chambers must be inspected for straightness, obstructions and for ground water infiltration. They must also pass the following tests which must be carried out in the presence of an uthority s Inspector. Water test uthorities require this test to be carried out in suitable lengths as work proceeds as well as after backfilling is completed. Gravity drains should be tested to an internal pressure of: 1.5 metres head of water above the invert of the pipe at the high end of the line and not more than 4 metres head of water above the invert of the pipe at the lower end of the line. Fill the pipe and allow two hours for settlement, topping up as necessary. Then add water for 30 minutes to maintain the test head. Note the quantity of water needed. Water loss may be due to trapped air or leakage. The rate of water loss should not exceed 1 l/h per metre diameter per linear metre run of pipe (see S 8000: 14: 1989 lause ). ir test It may be quicker and more convenient to carry out an air test, especially for large pipes or when water is not available. However because this test is more sensitive than a water test and is affected by any changes in temperature, failure is not conclusive. nd since it is difficult to detect the point of failure with an air test a water test should be carried out if failure does occur. Pump air into the system until a pressure of: 100mm head of water is shown on a connected U-tube for standard pipe lines, or: 50mm head of water is shown on a connected U-tube where gullied and/or ground floor appliances are connected. The 100mm head of water pressure should not fall by more than 25mm over a period of five minutes. The 50mm head of water pressure should not fall by more than 12.5mm over a period of five minutes. Smoke test Smoke tests are not officially accepted tests but are used to detect leakage points after other tests have failed. ertain smoke canisters are not suitable for use with PV-U drainage systems. Obtain the advice of the canister manufacturers before testing by this method. Safety The relevant regulations detailed in the Health and Safety at Work ct 1974 must be adhered to on site. Solvent ements, Fillers and Degreasing leaners When making solvent weld joints, it is essential to observe normal safety rules for handling solvents. Never smoke or bring naked flames near the area of work. Work in a well ventilated area to avoid inhaling fumes. lose the solvent container after use and store in a cool place. Do not allow solvents or cleaners to come into contact with the skin. Handling and Trench Safety Take care when removing pipes from bundles as the straps are under considerable tension and may flail when cut. Follow the relevant ritish Standard odes of Practice and Sewers for doption when digging trenches to prevent accidents from trench collapse. Use the correct fencing and marking whenever a trench is accessible to the public. Maintenance The smooth bore of Osma UltraRib pipes combined with their long lengths reduce the risk of blockages. However if a blockage does occur, use only flexible or roller type rods. Pointed or boring type metal fittings are NOT recommended. Tests have been carried out on PV-U pipes and fittings from specialist drain cleaning contractors and their normal equipment is suitable. Do not use specialist cutting attachments. Water jetting For guidance on good working practice when using water jetting equipment for the unblocking and cleaning of all types of drains and sewers refer to the WRc Sewer Jetting ode of Practice. 2nd Edition, Sections , and opies are available from: Publications WRc plc Frankland Road lagrove Swindon SN5 8YF Tel: Publications@wrcplc.co.uk 38 ustomer Services: Technical dvice:

39 Notes

40 Osma UltraRib System: Product and Installation Guide OSM is the UK s leading name in plastics systems for all types of above and below ground gravity drainage and sewer installations in any private or public environment. The compatibility of these quality-assured systems enables complete, fully-integrated assembly, from a single source, to capture and transport, rain and surface water, and to manage soil and waste from buildings. Wavin operates a programme of continuous product development, and therefore reserves the right to modify or amend the specification of their products without notice. ll information in this publication is given in good faith, and believed to be correct at the time of going to press. However, no responsibility can be accepted for any errors, omissions or incorrect assumptions. Users should satisfy themselves that products are suitable for the purpose and application intended. Wavin Registered Office Hazlehead row Edge Sheffield S36 4HG Wavin provides effective solutions for essential needs of daily life: safe distribution of drinking water; sustainable management of rainwater and waste water; energy efficient heating and cooling for buildings. Wavin s European leadership, local presence, commitment to innovation and technical support, all benefit our customers. We consistently achieve the highest sustainability standards and ensure total reliability of supply to support our customers to achieve their objectives. June 2014 UR102 Solutions for Essentials