BS EN :1998. Fittings Description Dia mm Code. Equal Junction. Double Socket

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1 BS EN :1998 PlastiDrain PlastiDrain is a plastic gravity drainage system designed for both foul and surface water applications in housing, industrial, commercial and highway drainage. PlastiDrain is based on 110mm and 160mm diameter pipes and includes a comprehensive range of fittings, gullies and inspection chambers together with a wide range of adaptors for connection to a variety of other pipe systems. Product Selector PlastiDrain Pipes Description Frame Qty Dia mm Code Pipe Plain Ended (BS) 3.0m P01A3 6.0m P01A6 3.0m P01A3 6.0m P01A6 Pipe Single Socketed (BS) 6.0m P01E6 3.0m P01E3 Pipe Plain Ended Slotted 6.0m P01C6 Coupling PVC-U 82 3P02B Polypropylene 110 4P02A PVC-U 110 4P02B PVC-U Repair 110 4P02C Loose Socket Solvent 82 3P02D 110 4P02D Settlement Socket 110 4P50C Allows up to 270mm of movement Bend 87 1 / P03B P04B 22 1 / P05B 11 1 / P06B Bend Single Socket 87 1 /2 82 3P03A P04A 87 1 / P03A P04A 22 1 / P05A 11 1 / P06A Flexible Bend (0-25 ) Single Socket 110 4F05A Long Radius Bend Plain Ended /2 450mm Radius 110 4P07B Long Radius Bend Radius 110 4P07F Rest Bend Equal Junction 87 1 /2 82 3P08B 87 1 / P08B P09B Equal Junction Triple Socket 45 x 82 3P09C 87 1 / P08C P09C Level Invert Reducer x 82mm 110 4P11A Stopper Socket Fitting 82 3P10A 110 4P10A Temporary Pipe 110 4A15A Cover fits into Socket Internal Blanking Plug 100/110 S89P Internal Drain Connector to 32/40mm Waste 100/110 S460P to 50mm Waste 100/110 S462P Internal Drain Connector - To Rainwater Round 100/110 4A06R Square 100/110 4A06S Internal Drain Connector - To Soil Stacks 100/110 S464P Adaptor to Socket Mortar joint 110 4A01A W.C. Adaptor 110 4A02A Adaptor to Waste Pipe 32mm 110 4A03A 40mm 110 4A04A Adaptor to Rainwater Pipe 68mm Round 82 3A06A 65mm Square 82 3A06S 50mm Round 110 4A05A 68mm Round 110 4A06A 82mm Round 110 4A07A Adaptor to Clay (Black) HepSleve 110 4A08A SuperSleve 110 4A18A Adaptor to Clay Cast Iron Spigot Single Mortar 110 4A09A Joint Socket Adaptor to Cast Iron 110 4A09B Spigot Adaptor Double Ended 100/110 4A19A for converting SuperSleve to Plastidrain. Square Top Rodding Point 110 4A10SA Sealed c/w Coupling Straight Rodding Eye Terminal 110 4A20A c/w Sealing Plate and Screws Access Pipe Single Socket c/w Screw Cap 82 3A11A 110 4A11A Access Pipe Single Socket c/w Screw Down Cover 110 4A13A Access Bend Single Socket 87 1 /2 c/w Screw Cap 110 4P03D Double Access Junction 45 Four Socket 110 4A13C c/w Screw Down Cover and Optional Left/Right Stoppers Access Plug c/w Screw Cap Spigot Tail 110 4A21A Wall Protection Sleeve 110 4A14A

2 Product Selector Soil Manifold For Soil/Waste Connections at Floor Level Universal Inlets accept 1 1 /4"-32mm and 110 S300/A* 1 1 /2"-40mm Waste Pipe For 2" connections use inlet grommet 50 S352 Telescopic Caravan Connector 800mm max. extension 110 4P50B Gully Gully Square with rotating top c/w Grid 110 4A12A Spare Rotating Top and Grid Spare rotating top c/w Grid 4A12H Inlet Gully Polypropylene c/w Grid 110 4A17A Trap 110 4A17D Raising Piece 110 4A17E Paved Area Gully Polypropylene c/w Grid 110 4A22A Top Assembly 110 4A22B Cover Plate 110 4A22C Metal Grid 110 4A22D *Square Hopper Spigot Outlet c/w Grid Two boss Inlets 110 4H10A Order Boss Adaptors separately Grid 110 4H11B *Rectangular Hopper Spigot Outlet c/w Grid & Cover Plate. Two boss Inlets 110 4H11A Order Boss Adaptors separately Grid 110 4H11B Cover Plate 110 4H11E Sealed Hopper c/w Screwed 110 4H12A Blanking Plate Lowback P Trap with improved stability for trench seating 110 4T10C - double socket Boss Adaptor for Push-Fit/Solvent/Copper connection 1 1 /4"-32mm 110 S /2"-40mm 110 S421 * Both the Square & Rectangular Hoppers are designed so that the 110mm spigot outlet can be cut off leaving a solvent socket, enabling variable spigot lengths to be fitted Channels Description Dia mm Code Anti-Flood Valves Manhole Connector Plain Ended 110 4C01A 635mm long Channel Coupling 110 4C02A Bend Single Socket 87 1 /2 Left Hand 110 4C03AL 87 1 /2 Right Hand 160 4C03AR 45 Left Hand 110 4C04AL 45 Right Hand 160 4C04AR Straight Channel Pipe 1.5m long 110 4C07A Long Radius Channel Bend Plain Ended 871/2 450mm Radius 110 4C07B Equal Channel Junction 87 1 /2 Left Hand 110 4C08BL 87 1 /2 Right Hand 110 4C08BR 45 Left Hand 110 4C09BL 45 Right Hand 110 4C09BR Description Dia mm Codes Eurofix 110/160 Telescopic raising piece and locking cover single valve, single 110 QE100P socket use SA15/1 & SA9 Adaptors for SuperSleve single socket 160 QE150P use SA15/2 & SA10 Adaptors for SuperSleve Staufix 110/160 Double valve, single 110 QS100P spigot use SA15/1 & SA9 Adaptors for SuperSleve Double valve, single 160 QS150P spigot use SA15/2 & SA10 Adaptors for SuperSleve PlastiDrain 160 Pipes Description Dia mm Code Pipe Plain Ended (BS) 3.0m Frame Qty P01A3 6.0m Frame Qty P01A6 Pipe Single Socketed (BS) 3.0m Frame Qty P01B3 6.0m Frame Qty P01B6 Pipe Plain Ended Slotted 6.0m Frame Qty P01C6 Coupling Polypropylene 160 6P02A PVC-U 160 6P02B PVC-U Repair 160 6P02C Loose Socket Solvent160 6P02D Bend P03B P04B P05B P06B Bend Single Socket 87 1 / P03A P04A P05A P06A Long Radius Bend Plain Ended 871/2 600mm Radius 160 6P07C Long Radius Bend Radius 160 6P07F Equal Junction Triple Socket P08C P09C Unequal Junction Triple Socket 90 x 110mm 160 6P08F 45 x 110mm 160 6P09F Level Invert Reducer x 110mm 160 6P11B Stopper Socket Fitting 160 6P10A Adaptor to Socket Mortar joint 160 6A01A Adaptor to Clay (Black) HepSleve 160 6A08A SuperSleve 160 6A18A Adaptor to Clay Cast Iron Spigot Single Mortar Joint 160 6A09A Socket Adaptor to Untrapped Road Gully 160 6A08B Spigot Adaptor Double Ended for converting SuperSleve to PlastiDrain. 150/160 6A19A Access Pipe Single Socket c/w Screw Down Cover 160 6A13A Access Junction Triple Socket c/w Screw Down Cover 45 Left Hand 45 Right Hand 45 Left Hand 160 6A13BL 45 Left Hand, Unequal x 110mm 160 6A13EL 45 Right Hand, Unequal x 110mm 160 6A13ER Access Plug c/w Screw Cap Spigot Tail 160 6A21A Wall Protection Sleeve 160 6A14A Channels Description Dia mm Code Channel Bend Single Socket 87 1 /2 Left Hand 160o 6C03AL 87 1 /2 Right Hand 160 6C03AR 45 Left Hand 160 6C04AL 45 Right Hand 160 6C04AR Channel Bend Double socket C03B C04B Long Radius Channel Bend Plain Ended 871/2 600mm Radius 160 6C07C Long Radius Channel Bend Double socket 90 Radius 160 6C07F Equal Channel Junction Triple socket 90 Left Hand 160 6C08CL 90 Right Hand 160 6C08CR 45 Left Hand 160 6C09CL 45 Right Hand 160 6C09CR Unequal Channel Junction Triple Socket 90 Left Hand x 110mm 160 6C08FL 90 Right Hand x 110mm160 6C08FR 45 Left Hand x 110mm 160 6C09FL 45 Right Hand x 110mm160 6C09FR Manhole Connector 635mm long 160 6C01A Channel Coupling 160 6C02A Universal Inspection Chambers Universal Inspection Chambers Description Dia mm Code Use up to 0.6m Mini Access Chamber Polypropylene dia Access Chamber Depth 600mm, three 100/110mm inlets Complete Unit 110/100 SDAC1/1 including adaptors to 110mm Polymer Cover SDC3 & Frame (airtight) 345mm x 345mm square. Effective height 85mm Raising Piece, SDC4 with rubber sealing ring Effective height 150mm Base Unit 110/100 SDC5 215mm deep with two 100/110mm Flexible inlets allowing 10 of movement 110mm adaptors included 100/110mm PPIC Polypropylene Inspection Chamber 475mm diameter. Supplied with stoppers in inlets (4 only). Depth 940mm, five 100/110mm inlets 110/100 SPIC1/1 Depth 595mm, five 100/110mm inlets 110/100 SPIC2/1 Use up to 1.2m 110mm Adaptors included Inspection Chambers UGS Mixed Base PPIC Polypropylene Inspection Chamber 475mm diameter. Supplied with stoppers 100/110 in inlets (4 only). and Depth 1030mm, 160/150 SPIC1/2 150/160mm straight through main channel with 2x150/160 branches at 90 and 2x100/110 branches at 45. Use up to 1.2m Extra Stoppers 150 UYS

3 Product Selector Reduced Access Chambers Description Dia mm Code Reduced Access Telescopic PPIC Improves safety by preventing man entry whilst still allowing inspection and maintenance access to drains and sewers. Depth range m A choice of DN100 or DN150mm diameter inspection chambers with combinations of 700mm or 175mm risers, together with sealing rings, plus a new adjustable cover and frame with 350mm Vertical and 4 angular adjustment. Universal - connects to DN100/150mm SuperSleve and PlastiDrain systems Telescopic Raising Piece Assembly SPIC3/7 Airtight, Class B square cover with 350mm vertical and 4 angular adjustment, c/w installation instructions. Access not greater than 350mm dia Raising Piece SPIC3/4 700mm deep, pre-sealed Raising Piece SPIC4 175mm deep Sealing Ring for SPIC5 Raising Piece 100/110mm 100/110 SPIC1/1 Polypropylene Inspection Chamber 940mm deep, 475mm diameter, 5 inlets 150/160mm 150/160 SPIC1/2 Polypropylene Inspection Chamber 940mm deep, 475mm diameter, 5 inlets Raising Piece SPIC4 175mm deep Sealing Ring for SPIC5 Raising Piece Base, 225mm deep 110/100 SPIC6/1 five 100/110mm inlets. 110mm adaptors included Mixed Base, 100/110 & SPIC6/2 315mm deep 160/ /160mm straight through main channel with 2x150/160 branches at 90 and 2x100/110 branches at 45. Supplied with 4 inlet stoppers Universal Inspection Chambers Description Dia mm Code Inlet Adaptor mm 150/100 SPIC7 Inlet Adaptor from mm 160/110 6P22A Round Ductile Iron Cover & Frame (airtight) Includes security clips for SPK8 additional safety - EN124 Square Ductile Iron Cover & Frame SPKS8 Includes security clips for additional safety - EN124 Round GRP Cover & Frame Black Includes security clips for SPK10 additional safety - EN124 Universal Inspection Chambers Description Dia mm Code Round GRP Cover & Frame Green Includes security clips for SPK11 additional safety - EN124 Recessed Cover for optional surface cover SPCR8 Yard Gullies Description Dia mm Code Yard Gully Available with either domestic or medium grating A30A Internal Internal Back dia depth dia 225mm 585mm 110mm Domestic Duty Grating (up to 1 Tonne) Medium Duty Grating (up to 5 Tonnes) Combined Filter and Silt Bucket Yard Gully Raising Piece ( high) 4A31A 4A32A 4A33A 4A34A Road Gullies Description Dia mm Code Description HDP Polyethylene Gully, untrapped 150mm SuperSleve outlet Internal dia x Internal depth 375x750mm 150 GO3A 510x840mm 150 GO4A Use 6A18A to adapt to PlastiDrain HDP Polyethylene Gully, trapped 150mm SuperSleve outlet Internal dia x Internal depth 375x750mm 150 GO6A 510x840mm 150 GO7A Use 6A18A to adapt to PlastiDrain Manhole Covers Description Dia mm Code Double Triangular Clear Ductile opening Grade D x600 IDC1 Double Triangular Cast Iron Grade D X600 IDC2 Rectangular (Slide Out) Ductile Grade B x450 IDC4 Grade B x600 IDC6 Rectangular Clear Cast Iron opening Grade A X600 IDC7 Double Triangular Ductile 405x435 IDG1 Grade GA1-450 Manhole Covers Description Dia mm Code Rectangular End Hinged GA x400 IDG7 Ductile Grade D-400 GA x310 IDG8 Ductile Grade C-250 GA x350 IDG9 Ductile Grade D-400 Lifting Keys Heavy Duty (per pair) ILK1 Light Duty (per pair) ILK2 Accessories Description Dia mm Code Solvent Cement - 250ml Can Solvent Cleaning Fluid - 250ml Can Lubricant Bottle - 500ml S241 S243 S264 Lubricant Tub - 1 kilo SL1P kilo SL2P Expanding Pipe Stopper For Pipe Testing 110 4P30A 160 6P30A Universal Grease Trap 550mm deep 100/110 RGU1 Supplied complete including filter basket, spatula, cover and frame and 100/110 conversion adaptors Internal length Internal width 600mm 450mm Spare Cover and Frame Spare Filter Basket and Spatula IGUCI RGUFB Product Data Square PPIC Cover SPKS8 Square P.P.I.C. Cover Square design Enables accurate and tidy fit to paving materials Screw down and captive Safety and security improved Sealed top Suitable for all applications including internal Rotatable Best alignment to paving materials Strength - one tonne wheel load Can be safely used in driveways Security clips Added safety

4 Product Data continued Inlet Gully 4A17A 55mm 220mm 250mm 165mm Inlet Gully Flexible outlet for 5 to 20 adjustment from the horizontal Ease of connection to difficult angles Removable dip tube trap Improved maintenance by allowing gully to be cleaned more easily. Access to outlet for full bore rodding Brush strip vertical back inlet Maximum flexibility of inlet configurations Multi-material construction Optimum strength for a positive location, utilises versatility of modern materials Square top Neat fit to walls and paving materials 20% increased capacity Unrestricted flow Offset cover Easy location to slab foundation or against building. Easy access to back inlet Compact design Reduced excavation and easy accommodation of shallow foundation to ground height Stabilising feet Increased stability during installation Ability to accept raising pieces Maximum flexibility of height, using 4A17E raising piece Good aesthetics End user satisfaction 360 rotation of top to base Ensures perfect fit every time. Outlet can be adjusted to take best design line Hinged Screw Down captive grid Enhanced safety and security Hinged cover plate option Increased design flexibility where grids are not suitable Paved Area Gully 4A22A Square Gully with Rotating Top 4A12A 191mm 151mm 211mm 271mm 248mm Paved Area Gully 150mm square grid Easy fit to paving materials Hinged captive grid Tidy, secure and easy to maintain Removable dip tube trap Ease of maintenance and rodding Paving platform around grid Ensures accuracy of fit for paving 360º rotatable top Perfect fit and best line from gully Hinged cover plate option Increased design flexibility Inlet Gully Square with Rotating Top Rotatable top Perfect fit and best line from gully Polypropylene contruction Robust and less likely to damage Versatile grid Allows 6 different rain and waste water connections Rodding Point 4A10SA 164mm 158mm 126mm mm 164mm Rodding Point Square top Enables best fit to surface paving or buildings Hinged, sealed, screw down top Secure, easy to maintain, suitable for all applications Durable material Excellent impact resistance Strength - one tonne wheel load Can be safely used in driveways

5 Product Data continued Flexible Bend 4F05A 140mm 25 Pipes, Bends & Junctions Pipe Depth insertion marks embossed into pipe Improved joint security and guaranteed performance Fittings Socketed fittings as standard Speed and ease of fitting Flexible Bend 0-25 multi-direction adjustment Difficult angles and distances accommodated Further Range Enhancements Increased cover stability on PPIC Safety and security increased Typical application details printed on critical items 100% installation confidence Recycled material used in sockets and chambers Environmental awareness Mini Chamber SDAC1/1 600mm 405mm 405mm Mini Chamber Flexible inlet arms from 0 to 10 Ease of connection in difficult conditions Square cover Neat fit to paving and other surface materials Purpose made raising pieces with integral seals Quick and simple height adjustment with no loss of system water and air tightness Only one base with two 45 inlets Ordering simplified with ultimate in flexibility - one base does everything Non level invert. Inlet arms are raised above main channel Flow greatly improved Increased flow characteristics by computer aided design Maximum efficiency and low maintenance Shallow base unit designed for direct fit to cover Accommodation of pipes laid at shallow depths Advanced polymer cover Reduced maintenance and long life Application Details Inlet Gully with External Vertical Waste Connection 55mm Hopper Waste pipe Hinged Captive Grid Removable trap Inlet Gully with Internal Vertical Waste Connection 55mm Hopper Hinged Captive Grid Waste pipe Adaptor for waste pipes 90 bend 4P03A Flexible outlet Set in concrete Inlet gully 4A17A Flexible outlet Set in concrete Inlet gully 4A17A Removable trap Pipe cut to size

6 Application Details continued Paved Area Gully with Horizontal Inlet Inlet Gully with Raising Piece and Cover Plate (4A17A) Hinged Captive Grid Hinged Captive Grid or Optional Cover Plate 168 mm Hopper 325mm 245mm Cover to outlet increased by use of gully extension Variable max 505mm Raising Piece 4A17E Paved area gully with HBI 4A22A Pipe cut to size Straight outlet Inlet gully 4A17A Set in concrete Removable trap Set in concrete Removable trap Paved Area Gully Chosen surface finish Square Gully with Rotating Top (4A12A) 168mm 325mm 70mm Waste or Rainwater pipe up to maximum 68mm diameter or 65mm square pipe Polypropylene grid (provided) secured at corners by four Push-fit plugs Rotatable top Square compact Gully 4A12A 4A22A Set in concrete Concrete bed Removable stopper allowing Rodding access Mini Chamber Offset to Main Drain Plastic cover and frame with tilt action for sloping ground Stoppers blank off inlet not required Flexible inlet side branch Depth adjustable 600mm Standard raising piece 150mm Bend (Positioned off main drain run) Main drain Rodding Point ;; ;; Concrete 45 Bend 4P04A Designer to specify Flexible Bend Flexible bend 4F05A Use of flexible bend with a 45 junction gives a pipe to pipe variable angle of PlastiDrain Pipe or Bend Oblique junction 45 Triple socket 4P09C

7 System Performance Materials: Pipes and fittings are manufactured from Unplasticized polyvinyl chloride (PVC-U); Gullies from PVC-U, polypropylene (PP), or polyethylene (PE); Inspection chambers from polypropylene. Couplings can be made from either PVC-U or PP and contain a rubber sealing ring manufactured from styrene butadiene rubber (SBR). Colour: Pipes, Gullies and fittings are in terracotta. Inspection Chambers and elastomeric joint rings in black. Standards: The PlastiDrain system is manufactured to the highest possible standards and where relevant is manufactured in accordance with BS 4660: 2000 and BS EN : 1998 which specifies the requirements for underground pipes and fittings in sizes 110mm and160mm. Rubber seals are manufactured to BS EN 681: In addition the PlastiDrain system has been independently assessed by the British Board of Agrément and has been awarded an Agrément Certificate No 86/1648. Quality Assurance: All Hepworth products are manufactured under a quality management system which is approved to BS EN ISO 9001:2000 Quality Management Systems - Requirements. Maintenance: A PlastiDrain system when correctly designed and installed should not need maintenance. However, blockages do occur from time to time and the pipeline will need to be cleared. Provision of access points into the system should be made in the design of the drainage layout. Should a blockage occur, flexible or roller type rods should be used. From July 1998 the new Europe-wide manufacturing standard BS EN :1998 started to replace BS However, 110mm and 160mm access fittings are not covered by the new standard and will conform to BS 4660:2000. Recommended Bedding Requirements The following notes are given as a broad indication of the main installation measures to be considered. Further advice and information can be obtained from Hepworth Technical Advisory Service on Tel: Trench Preparation: The trench should not be excavated too far in advance of pipe laying and should be backfilled as soon as possible. Trench widths should be as narrow as practicable but not less than the pipe OD plus to enable proper compaction of sidefill. Trench sides should be correctly supported. The type of bedding and filling needed depends on:- the pipe type and size type of subsoil the load on the surface of the trench (eg. under a road, field or garden) the depth of pipe under the surface width of trench These are recommendations made by Hepworth. Standard beddings are defined in BS 5955: Part 6: 1980 and BS EN1295. Trench Backfilling: Hand tamp the backfill fully at the sides of the pipe while tamping lightly over the crown. This should continue until a minimum thickness of has been placed over the pipe. As dug material may then be placed in layers and mechanically compacted. Dumpers and other vehicles should not be driven along the trench as a means of compaction. Pipes laid at depths greater than 900mm cover in roads, 600mm in fields. Pipes laid in as dug subsoil suitable as bedding material* Pipes laid in subsoil unsuitable as bedding material which does not puddle when walked on. Pipes laid in subsoil unsuitable as bedding material. Pipes laid at depths less than 900mm cover in roads, 600mm in fields. Ground Level (GL) GL GL GL Backfill Material Concrete Slab Sidefill Material 100mm 50mm Bedding Material 100mm 100mm NB: Alternatively, pipes may be protected using a 150mm thick reinforced concrete surround with allowance for flexibility at pipe joints. As dug backfill/sidefill maximum particle size 10mm (110 dia) 14mm (160 dia) 10mm single-sized aggregate (complying with BS 882) NB Where backfill above pipe contains stones greater than 40mm or cover to pipe exceeds 2m in poor ground extend the bedding material to 100mm above the pipe crown. * Suitable material - granular material in accordance with BS 5955 Part 6: 1980 Appendix A maximum particle size - 10mm (110 dia), 14mm (160 dia). backfill free from stones greater than 40mm (unless granular material extends 100mm above pipe see above) As dug backfill Granular material in accordance with BS 5955 Part : table 2 Pipe dia Material (complying with BS 882) (mm) (mm) , single-sized , 14 single-sized, 14-5 graded

8 Sitework and Installation Instructions It is important that good care is taken on site to prevent unnecessary wastage of materials and time and for the prevention of problems after laying thus causing delay and additional expense. 1 Transport:- Generally pipes are delivered pre-packed in standard quantities, held by nylon straps and timber supports. Loose pipes are hand loaded, care should be taken to clear the carrying surface of debris and nails. Pipes should not overhang the vehicle by more than 1m. Vehicles should have side supports no more than 2m spacing. With mixed loads of pipes ensure that the larger diameter pipes are at the bottom. Fittings are supplied in cardboard boxes or plastic bags. Incorrect way to load pipes 2 Handling:- Pipes should never be thrown from lorries, dropped or dragged along the ground. Use web or rope slings when mechanically lifting pipes, do not use metal slings, hooks or chains. Take extra care in wintry conditions as cold weather reduces the impact strength of PVC-U. Incorrect way to off load pipes Correct way to load pipes Correct way to off load pipes 3 Storage:- Pipes should be laid on a flat surface free from large stones and projections. If this is not possible pipes should be placed on transverse bearers with side supports. Stack pipes of different sizes separately, if this is not possible stack larger pipes at the base (see diagram a) Pipes should not be nested for long periods and stacks should not exceed seven layers or 2m in height. Stack socketed pipes as diagram b. Ensure that the first layer is raised off the ground. Fittings supplied in bags should be stored away from direct sunlight. Incorrect way to stack pipes a Correct way to stack plain ended pipes Stacking single socket pipes 4 Cutting:- To cut a pipe to a specified length, use the following procedure. a) Mark the pipe, and cut cleanly at a right angle to the pipes horizontal axis using a fine tooth saw. b) The cut end should be chamfered to approx 15 for half the pipe wall thickness and deburred with a sharp tool. 5 Jointing:- Pipes and fittings are joined by push-fit joints. Socket ends are fitted with an elastomeric seal which is compressed by the spigot end of the joining pipe to form an effective seal. a) Ensure both pipe end and sealing ring are clean. b) Lubricate both pipe end and sealing ring. c) Align components and push home fully. If expansion is required the spigot may be withdrawn by 12mm. An allowance for expansion only needs to be made when using PVC-U couplings. This is not necessary with the use of polypropylene couplings. If extra leverage is required to push home the spigot, use a timber block at the trailing end to prevent damage. The push-fit joint allows for some angular deflection giving ease of installation whilst allowing for subsequent ground movement. 6 Testing:- All lengths of drains and sewers installed correctly using the Plastidrain system will pass the appropriate air or water test. An air test is usually more convenient but an excessive drop in pressure may be due to a change in temperature, defective apparatus or failure in the pipeline. Should this occur a water test is recommended so that the leakage can be assessed and located. Protection of pipes laid at very shallow depths Pipes may be protected at shallow depths using a 150mm thick reinforced concrete surround, with allowance for flexibility at pipe joints using compressible boards which should be equal in size to the concrete cross section, or by means of reinforced bridging slabs of adequate strength. b Advisory Services Technical Advisory Service This service covers all aspects of Hepworth products from design through to maintenance. Hydraulic and structural design Quantity take offs and material scheduling For any advice or assistance on these matters contact the Technical Advisory Service on: Tel: Fax: For Customer Service customerservices@hepworth.co.uk Literature For details of other products in the Hepworth range, please telephone the Literature Service Hotline on: Tel: Fax: Availability The Hepworth range is available through a nationwide network of builders merchants or direct from Hepworth. For further details please telephone our order enquiry hotlines on: Tel: Fax: HAZLEHEAD CROW EDGE SHEFFIELD S36 4HG TELEPHONE FACSIMILE Our policy is one of constant development. Whilst this publication is accurate at the date of printing, specification/approvals may be changed in the interest of continued improvements. Hepworth Building Products drainage@hepworth.co.uk web site: PD/11/06/2399