D-4 - OUTLINE SPECIFICATIONS FOR NON-POTABLE IRRIGATION PIPING SYSTEMS. Remote Control Valves:

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1 D-4 - OUTLINE SPECIFICATIONS FOR NON-POTABLE IRRIGATION PIPING SYSTEMS PART 1: GENERAL 01 DESIGN REQUIREMENTS: A. Consultant Design: Intent: The intent of the irrigation design documents is to provide The Colorado College detailed installation drawings, details, and specifications. The documents set the desired level of excellence, flexibility, and efficiency expected of the irrigation system. All required coordination for the installation of the irrigation system is to be completed by the Irrigation Consultant. The Irrigation Consultant must become familiar with the City of Colorado Springs Reclaimed Water Design Standards and adhere to these standards for the design of all irrigation systems on the Colorado College Campus. General Requirements: Provide detailed irrigation system installation drawings for the sprinkler and drip irrigation systems including but not limited to sleeving and mainline pipe routing and sizing; remote control valve locations and sizing; lateral pipe routing and sizing; sprinkler and drip irrigation layout; controller size and stationing; control wire routing and sizing. Remote Control Valves: a. b. c. d. e. f. Individual turf zones have a capacity for a maximum flow of 100 GPM. Individual drip zones have a capacity for a maximum flow of 20 GPM. 1-inch remote control valves must have a flow capacity between 0 to 25 GPM. 1 ½-inch remote control valves must have a flow capacity between 26 to 50 GPM. 2-inch remote control valves must have a flow capacity between 51 to 100 GPM. Spray sprinklers and rotary sprinklers should be installed on separate remote control valves. OUTLINE SPECIFICATIONS FOR NON-POTABLE IRRIGATION PIPING D-1

2 g. Areas with different exposures, plant material, water use requirements, and active or passive uses must be on separate remote control valves. For example, turf in a parking island should be on a separate lateral from turf in a pedestrian area. 5. Pipe: a. b. c. Mainline pipe velocities must not exceed 5 FPS. Lateral pipe velocities must not exceed 7.5 FPS. Maximum allowable variation between the highest and lowest sprinkler operating pressures on an individual lateral must not exceed 10%. Minimum mainline pipe size is 2-inch. Minimum sprinkler lateral pipe size is 1-inch. Minimum drip lateral pipe size is ¾-inch. 6. Sprinkler Layout Guidelines: a. b. c. d. e. f. g. Use pop-up spray sprinklers on turf areas and annual planting beds. Use pop-up spray sprinklers in areas less than 30 feet in width or in areas, which are oddly shaped. Use pop-up rotary sprinkles in turf areas. Use pop-up rotary sprinklers in areas greater than 30 feet in width. Use a sprinkler nozzle and spacing combination such that the scheduling coefficient for every sprinkler lateral is between 1 and If a maximum scheduling coefficient of 2 can not be achieved, use a sprinkler nozzle and spacing combination to achieve the minimum scheduling coefficient possible. Trim out all hardscape areas. Layout sprinklers to minimize overspray onto sidewalks, buildings, and attractions. Spray sprinklers on an individual zone must have matched precipitation rate nozzles. Nozzles for rotary sprinklers on an individual zone must approximate a uniform precipitation rate. All sprinklers must show the intended sprinkler nozzle. OUTLINE SPECIFICATIONS FOR NON-POTABLE IRRIGATION PIPING D-2

3 7. Drip Irrigation Layout Guidelines: a. b. Use inline drip tubing products, installed beneath the landscape fabric on intensively planted shrub and perennial beds. Use point source drip emitters on shrubs and trees that are planted in a non linear or random pattern or are not adequately dense for the use of inline drip tubing. 8. Controller Stationing/Sequencing a. b. Assign only one remote control valve per controller station. Assign station numbers in a logical manner to allow maintenance personnel to easily inspect the operation of the system on a regular basis. B. Detailed Irrigation Layout Drawings: Obtain from the Owner s Representative CAD drawing files showing the proposed landscape plan. Complete detailed irrigation layout drawings using CAD techniques. Submit layout drawings showing remote control valve locations and sizing, lateral pipe routing and sizing, sprinkler layout, emitter layout, controller sizes, and controller stationing. Submit hydraulic calculations showing friction loss calculations from the point of connection to the most remote water emission device for the worst case spray sprinkler and rotary sprinkler laterals. List the highest and lowest sprinkler operating pressures on the lateral. Submit uniformity evaluation charts for each sprinkler/nozzle/spacing combination showing the scheduling coefficient for the critical 1%, 5%, 10% window size. Submit control wire diagrams including sizing and calculations verifying that the control wire size is in accordance with valve manufacturer s printed recommendations. Submit Peak Season Irrigation Schedule as required by the City of Colorado Springs. Precipitation rates must be calculated for each remote control valve. Typical product catalog precipitation rates for nozzles will not be accepted. Submit calculations to the Owner if requested. OUTLINE SPECIFICATIONS FOR NON-POTABLE IRRIGATION PIPING D-3

4 PART 2: MATERIALS 01 SLEEVING: A. Provide separate sleeve beneath hardscape for wiring bundle. B. Sleeve all mainline and submainline piping when it is to be installed above existing potable waterlines. Sleeve for 10-feet each side of potable waterline. C. Provide SDR 11, HDPE pipe or SDR-21 CL200 PVC for wire sleeving. D. Sleeve sizing: twice the diameter of the pipe or wiring bundle. 02 PIPE AND FITTINGS: A. Non-Potable Mainline Pipe and Fittings: Sizes: 4-inch and larger. Use rigid, unplasticized polyvinyl chloride (PVC) 1120, 1220 National Sanitation Foundation (NSF) approved pipe, extruded from material meeting the requirements of Cell Classification A or B, ASTM Standard D1784, with an integral belled end. Use C900 Class 200 (DR-14), rated at 200 PSI, conforming to the dimensions and tolerances established by AWWA C900 and DR-14 requirements. Use purple colored pipe, Pantone 522 embossed or integrally stamped/marked CAUTION RECLAIMED WATER DO NOT DRINK. Pipe may also be installed with a purple identification tape, or a purple polyethylene vinyl wrap, color to be Pantone 51 Use rubber-gasketed pipe equipped with factory installed reinforced gaskets. Gasketed pipe joints must conform to the Laboratory Qualifying Tests section of ASTM D3139. Gasket material must conform to ASTM F477. Use rubber-gasketed mechanical joint ductile iron fittings conforming to ASTM A-536 and ASTM F-477. Use lubricant approved by the pipe manufacturer. Tracer Wire: Use copper wire with connectors per City of Colorado Springs Standard details. OUTLINE SPECIFICATIONS FOR NON-POTABLE IRRIGATION PIPING D-4

5 B. HDPE Mainline Pipe and Fittings: Sizes: 4-inch and larger. Use high density, extra high molecular weight polyethylene pipe (HDPE), extruded from material meeting the specifications of cell classification on PE C, ASTM standard D 3350, SDR 9, rated at 200 PSI, conforming to the dimensions and tolerances established by ASTM F 714 for mainline pipe. Use purple colored pipe or pipe with marking stripe, Pantone 522 embossed or integrally stamped/marked CAUTION RECLAIMED WATER DO NOT DRINK. Pipe may also be installed with a purple identification tape, or a purple polyethylene vinyl wrap, color to be Pantone 51 Join pipe lengths using butt-fusion technique as recommended by pipe manufacturer. Join HDPE to dissimilar pipe materials using HDPE (butt-fusion) x flange adapter with ductile iron back-up ring. 5. Tracer Wire: Use copper wire with connectors per City of Colorado Springs Standard details. C. Sub-Mainline Pipe and Fittings: Sizes: 2-inch. Use rigid, unplasticized polyvinyl chloride (PVC) 1120, 1220 National Sanitation Foundation (NSF) approved pipe, extruded from material meeting the requirements of Cell Classification A or B, ASTM Standard D1784, with an integral belled end. Use Class 200, SDR-21, rated at 200 PSI, conforming to the dimensions and tolerances established by ASTM Standard D224 Use PVC pipe rated at higher pressures than Class 200 in the case of small nominal diameters that are not manufactured in Class 200. Use purple colored pipe or pipe with marking stripe, Pantone 522 embossed or integrally stamped/marked CAUTION RECLAIMED WATER DO NOT DRINK. Pipe may also be installed with a purple identification tape, or a purple polyethylene vinyl wrap, color to be Pantone 51 OUTLINE SPECIFICATIONS FOR NON-POTABLE IRRIGATION PIPING D-5

6 5. Use rubber-gasketed pipe equipped with factory installed reinforced gaskets for mainline pipe. Gasketed pipe joints must conform to the Laboratory Qualifying Tests section of ASTM D3139. Gasket material must conform to ASTM F477. Use Harco rubber-gasketed deep bell ductile iron fittings conforming to ASTM A-536 and ASTM F-477. Use lubricant approved by the pipe manufacturer. 6. Tracer Wire: Use copper wire with connectors per City of Colorado Springs Standard details. E. Lateral Pipe and Fittings: Use rigid, unplasticized polyvinyl chloride (PVC) 1120, 1220 National Sanitation Foundation (NSF) approved pipe, extruded from material meeting the requirements of Cell Classification A or B, ASTM Standard D1784, with an integral belled end suitable for solvent welding. Use Class 160, SDR-26, rated at 160 PSI, conforming to the dimensions and tolerances established by ASTM Standard D224 Use solvent weld pipe for lateral pipe. Use Schedule 40, Type 1, PVC solvent weld fittings conforming to ASTM Standards D2466 and D1784 for PVC pipe. Use primer approved by the pipe manufacturer. Solvent cement to conform to ASTM Standard D2564, of a type approved by the pipe manufacturer. Use purple colored pipe or pipe with marking stripe, Pantone 522 embossed or integrally stamped/marked CAUTION RECLAIMED WATER DO NOT DRINK. Pipe may also be installed with a purple identification tape, or a purple polyethylene vinyl wrap, color to be Pantone 51 F. Specialized Pipe and Fittings: Copper pipe: Use Type "K" rigid conforming to ASTM Standard B88. Use wrought copper or cast bronze fittings, soldered or threaded per the installation details. Use 95% tin and 5% antimony solder. Use a dielectric union wherever a copper-based metal (copper, brass, and bronze) is joined to an iron-based metal (iron, galvanized steel, and stainless steel). OUTLINE SPECIFICATIONS FOR NON-POTABLE IRRIGATION PIPING D-6

7 Low Density Polyethylene Hose: a. Use pipe specifically intended for use as a flexible swing joint. Inside diameter: inch. Wall thickness: inch. Color: Black. b. Use spiral barb fittings supplied by the same manufacturer as the hose. Assemblies calling for threaded pipe connections shall utilize PVC Schedule 80 nipples and PVC Schedule 40 threaded fittings. 5. Joint sealant: Use only teflon-type tape or teflon based paste pipe joint sealant on plastic threads. Use non-hardening, nontoxic pipe joint sealant formulated for use on water-carrying pipes on metal threaded connections. D. Thrust Blocks: Use thrust blocks on all gasketed mainline pipe and fittings and at dead ends, ells, tees, or changes of direction. Use 3,000-PSI concrete. Use 2-mil plastic. Use No. 4 Rebar wrapped or painted with asphalt tar based mastic coating. E. Joint Restraint Harness: Use a joint restraint harness wherever joints are not positively restrained by flanged fittings, threaded fittings, and/or thrust blocks. Use a joint restraint harness with transition fittings between metal and PVC pipe, where weak trench banks do not allow the use of thrust blocks, or where extra support is required to retain a fitting or joint. Use bolts, nuts, retaining clamps, all-thread, or other joint restraint harness materials that are stainless steel. Use on pipe greater than or equal to 4-inch diameter or any diameter rubber gasketed pipe. OUTLINE SPECIFICATIONS FOR NON-POTABLE IRRIGATION PIPING D-7

8 03 MAINLINE COMPONENTS: A. B. C. Isolation Gate Valve Assembly: as presented in the installation details. Acceptable manufacturers are American, Clow, Kennedy, or Mueller. Air-Vacuum Relief Valve Assembly: as presented in the installation details. Provide a continuous acting combination air vacuum relief valve with an operating pressure rating of 150 PSI. Acceptable manufacturers are Bermad, Crispin, Fresno, or Waterman. Flow Sensor Assembly: as presented in the installation details. Acceptable manufacturer is Data Industrial. 04 SPRINKLER IRRIGATION COMPONENTS: A. Remote Control Valve (RCV) Assembly for Sprinkler Laterals: Use wire connectors and waterproofing sealant to join control wires to solenoid valves. Use standard Christy I.D. tags with hot-stamped black letters on a yellow background. Install a separate valve box over a 3-inch depth of 3/4-inch gravel for each assembly. Acceptable manufacturer and model for remote control valve is Weathermatic. Acceptable manufacturer for valve box is Armor or equal. B. Sprinkler Assembly: as presented in the installation details. Acceptable manufacturer and model for pop-up spray sprinklers in turf is Rain Bird 1804-PRS-SAM. Acceptable manufacturer and model for pop-up spray sprinklers in shrubs is Rain Bird 181 Acceptable manufacturer and models for pop-up rotary sprinklers are Hunter I-20 and I DRIP IRRIGATION COMPONENTS: A. B. C. Remote Control Valve (RCV) Assembly for Drip Laterals: as presented in drawings and installation details. Zone Control Valve Assembly: as presented in drawings and installation details. Drip Emitter Assembly: Use emitter device as presented in drawings and installation details. Use flexible plastic distribution tubing to direct water from emitter outlet to emission point. Use distribution tubing compatible with emitters. Do not exceed five feet length between emitter and distribution tubing outlet. Use tubing stakes to anchor distribution tubing. OUTLINE SPECIFICATIONS FOR NON-POTABLE IRRIGATION PIPING D-8

9 Provide access sleeve for each multiple-outlet emitter located in shrub area. D. E. Flush Cap Assembly: as presented in drawings and installation details. Inline Drip Tubing: Tubing: Use UV resistant polyethylene drip tubing with integral pressure compensating drip emitters. Emitter spacing as noted in drawings and installation details. Use emitters that are pressure compensating from 7 to 70 PSI. Use tubing with O.D. of 0.67, and I.D. of Use fittings compatible with inline drip tubing. Blank Drip Tubing: Use UV resistant polyethylene blank drip tubing for exhaust manifold tubing, as noted in drawings and installation details. Use tubing with O.D. of 0.67, and I.D. of Use fittings compatible with inline drip tubing. Use blank tubing from same manufacturer as Inline drip tubing. Air and Vacuum Relief Valve: Provide air and vacuum relief valve assembly on inline drip lateral per drawings and installation details. Use air and vacuum relief valve compatible with inline drip tubing. 06 EXCAVATION, TRENCHING, AND BACKFILLING: A. Minimum cover (distance from top of pipe or control wire to finish grade): inch minimum over mainline pipe. 18-inch over lateral pipe. 18-inch over control wire. 12-inch over lateral pipe to pop-up spray sprinklers. 12-inch over lateral pipe to rotary sprinklers. B. C. D. Maintain at least 15-feet clearance from the centerline of any tree. PVC lateral pipes may be pulled into the soil utilizing a vibratory plow device specifically manufactured for pipe pulling. Minimum burial depths equals minimum cover listed above. Backfill only after lines have been reviewed and tested. OUTLINE SPECIFICATIONS FOR NON-POTABLE IRRIGATION PIPING D-9

10 E. F. Excavated material is generally satisfactory for backfill. Backfill shall be free from rubbish, vegetable matter, frozen materials, and stones larger than 2-inches in maximum dimension. Remove material not suitable for backfill. Backfill placed next to pipe shall be free of sharp objects, which may damage the pipe. Backfill unsleeved pipe in either of the following manners: Backfill and puddle the lower half of the trench. Allow to dry 24 hours. Backfill the remainder of the trench in 6-inch layers. Compact to density of surrounding soil. Backfill the trench by depositing the backfill material equally on both sides of the pipe in 6-inch layers and compacting to the density of surrounding soil. G. H. I. Enclose pipe and wiring beneath roadways, walks, curbs, etc., in sleeves. Minimum compaction of backfill for sleeves shall be 95% Standard Proctor Density, ASTM D Use of water for compaction around sleeves, "puddling", will not be permitted. Dress backfilled areas to original grade. Incorporate excess backfill into existing site grades. Where utilities conflict with irrigation trenching and pipe work, contact the Owner s Representative for trench depth adjustments. 07 CONTROL SYSTEM COMPONENTS: A. Satellite Controller Assembly: As presented in drawings and installation details. Acceptable manufacturer and model is Toro E-Series Satellite controller with Osmac Digital Wireless Paging. Satellite controller must contain a radio frequency receiver and decoder capable of receiving and decoding standard digital paging signals compatible with the college s existing Site Pro Central Control System. B. Satellite Controller Assembly Pedestal: Toro Osmac E-series locking, weatherproof, cabinet-type enclosure constructed of painted stainless steel. Provide on concrete pad with mounting bracket, sleeving and conduits for electrical power, cables, wires, grounding, and surge protection. OUTLINE SPECIFICATIONS FOR NON-POTABLE IRRIGATION PIPING D-10

11 Provide combination switch/gfci outlet in accordance with local codes inside satellite controller pedestal enclosure. Prepare shop drawings to show the exact placement of all components housed in the enclosure prior to construction. Electrical conduit: Use PVC Schedule 40 conduit conforming to dimensions and tolerances established by ASTM Standard D Use Schedule 40, Type 1, PVC solvent weld sweep fittings for PVC conduit conforming to ASTM Standards D2466 and D1784 for buried installations. 5. Lightning protection: Provide one 12 x36 x ground plate, one 5/8 x10 foot copper clad UL listed grounding rod, 30 feet of #6 AWG bare copper grounding wire, two 6-inch round valve boxes, and one CADWELD connector at each satellite controller group. 6. Wire markers: Pre-numbered or labeled with indelible non-fading ink, made of permanent, non-fading material. C. Low Voltage Control Wire: Use American Wire Gauge (AWG) No solid copper, 600 volt, Type UF or PE cable, UL approved for direct underground burial for individual control wires and spare control wires from the controller assembly to each remote control valve or stub-out location. Use American Wire Gauge (AWG) No solid copper, 600 volt, Type UF or PE cable, UL approved for direct underground burial for common ground wire and spare common wires from controller assembly to each remote control valve or stub-out location. Color: Use white for common ground wire. Use easily distinguished colors for other control wires. Spare control wires shall be of a color different from that of active control wire. Wire color shall be continuous over its entire length. Warning tape: Inert plastic film highly resistant to alkalis, acids, or other destructive chemical components likely to be encountered in soils. Three inches wide, colored red, and imprinted with "CAUTION: BURIED ELECTRIC LINE BELOW." D. Communication Cable and Sensor Cable: Use shielded and jacketed, twisted pair, multi conductor PE-39 (3 pair), 19AWG wire designed for direct burial, as recommended by OUTLINE SPECIFICATIONS FOR NON-POTABLE IRRIGATION PIPING D-11

12 central control system manufacturer. Splices: Use 3M #SLiC with 3M Insulation Displacement Connectors (316IR or UR-2), Ranger Serviseal Connectors, or approved equal, as recommended by central control system manufacturer. Warning tape: Inert plastic film highly resistant to alkalis, acids, or other destructive chemical components likely to be encountered in soils. Three inches wide, colored red, and imprinted with "CAUTION: BURIED ELECTRIC LINE BELOW." 08 OTHER COMPONENTS: A. Tools and Spare Parts: Provide the following operating keys, servicing tools, and spare parts. Two operating keys for each type of manually operated valve. Two of each servicing wrench or tool needed for complete access, adjustment and repair of all rotary sprinklers. Two quick coupling keys, each with attached hose swivel ell for operation of the quick coupling valves. OUTLINE SPECIFICATIONS FOR NON-POTABLE IRRIGATION PIPING D-12