32_84_24_(Irrigation_Sprinkles).pdf

SECTION 32 84 24 Page 1

SECTION 32 84 24

IRRIGATION SPRINKLER SYSTEMS

08/11

PART 1 GENERAL

1.1 REFERENCES

1.2 RELATED REQUIREMENTS

1.3 SYSTEM DESCRIPTION

1.4 SUBMITTALS

1.5 DELIVERY, STORAGE, AND HANDLING

1.6 EXTRA STOCK

1.7 QUALITY ASSURANCE

PART 2 PRODUCTS

2.1 PIPING MATERIALS

2.2 IRRIGATION AND DRIP SPRINKLER HEADS

2.3 VALVES

2.4 ACCESSORIES AND APPURTENANCES

2.5 Automatic Controller [Electrical] [Solar] [Battery]

2.6 ELECTRICAL CIRCUITS

2.7 CONCRETE MATERIALS

PART 1 GENERAL

1.1 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

AMERICAN PETROLEUM INSTITUTE (API)

API Std 598 (2009) Valve Inspecting and Testing

AMERICAN SOCIETY OF SANITARY ENGINEERING (ASSE)

ASSE 1010 (2004) Water Hammer Arresters

ASSE 1020 (2004; Errata 2004; Errata 2004) Pressure Vacuum Breaker

Assembly

ASSE Series 5000 (2015) Professional Qualification Standard for Backflow Prevention Assemblies Testers, Repairers and Surveyors

AMERICAN WATER WORKS ASSOCIATION (AWWA)

AWWA C500 (2009) Metal-Seated Gate Valves for Water Supply Service

SECTION 32 84 24 Page 2

AWWA C511 (2007) Standard for Reduced-Pressure Principle Backflow Prevention Assembly

AWWA C651 (2014) Standard for Disinfecting Water Mains

AWWA C901 (2008) Polyethylene (PE) Pressure Pipe and Tubing, 1/2 In.

(13mm) Through 3 In. (76 mm), for Water Service

AWWA M14 (2015) Manual: Recommended Practice for Backflow Prevention and Cross-Connection Control

ASME INTERNATIONAL (ASME)

ASME B1.2 (1983; Errata 1992; R 2007) Gages and Gaging for Unified

Inch Screw Threads

ASME B16.15 (2013) Cast Bronze Threaded Fittings Classes 125 and 250

ASME B16.18 (2012) Cast Copper Alloy Solder Joint Pressure Fittings

ASME B16.22 (2013) Standard for Wrought Copper and Copper Alloy Solder Joint Pressure Fittings

ASME B16.3 (2011) Malleable Iron Threaded Fittings, Classes 150 and 300

ASME B40.100 (2013) Pressure Gauges and Gauge Attachments

ASTM INTERNATIONAL (ASTM)

ASTM A 53/A 53M (2012) Standard Specification for Pipe, Steel, Black and Hot-

Dipped, Zinc-Coated, Welded and Seamless

ASTM B 32 (2008; R 2014) Standard Specification for Solder Metal

ASTM B 43 (2014) Standard Specification for Seamless Red Brass Pipe, Standard Sizes

ASTM B 88 (2014) Standard Specification for Seamless Copper Water

Tube

ASTM D 1785 (2012) Standard Specification for Poly (Vinyl Chloride) (PVC), Plastic Pipe, Schedules 40, 80, and 120

ASTM D 2241 (2015) Standard Specification for Poly (Vinyl Chloride)

(PVC) Pressure-Rated Pipe (SDR Series)

ASTM D 2287 (2012) Nonrigid Vinyl Chloride Polymer and Copolymer Molding and Extrusion Compounds

ASTM D 2464 (2015) Standard Specification for Threaded Poly (Vinyl

Chloride) (PVC) Plastic Pipe Fittings, Schedule 80

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ASTM D 2466 (2015) Standard Specification for Poly (Vinyl Chloride)

(PVC) Plastic Pipe Fittings, Schedule 40

ASTM D 2564 (2012) Standard Specification for Solvent Cements for Poly (Vinyl Chloride) (PVC) Plastic Piping Systems

ASTM D 2774 (2012) Underground Installation of Thermoplastic Pressure

Piping

ASTM D 2855 (2015) Standard Practice for Making Solvent-Cemented Joints with Poly (Vinyl Chloride) (PVC) Pipe and Fittings

ASTM D 3261 (2015) Standard Specification for Butt Heat Fusion

Polyethylene (PE) Plastic Fittings for Polyethylene (PE) Plastic Pipe and Tubing

ASTM F 441/F 441M (2013; E 2013) Standard Specification for Chlorinated Poly

(Vinyl Chloride) (CPVC) Plastic Pipe, Schedules 40 and 80

FOUNDATION FOR CROSS-CONNECTION CONTROL AND HYDRAULIC

RESEARCH (FCCCHR)

FCCCHR List (continuously updated) List of Approved Backflow

Prevention Assemblies

MANUFACTURERS STANDARDIZATION SOCIETY OF THE VALVE AND FITTINGS

INDUSTRY (MSS)

MSS SP-80 (2013) Bronze Gate, Globe, Angle and Check Valves

MSS SP-85 (2011) Standard for Cast Iron Globe & Angle Valves, Flanged and Threaded Ends

NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION (NEMA)

NEMA ICS 2 (2000; R 2005; Errata 2008) Standard for Controllers, Contactors, and Overload Relays Rated 600 V Control Equipment

NEMA ICS 6 (1993; R 2011) Enclosures

NATIONAL FIRE PROTECTION ASSOCIATION (NFPA)

NFPA 70 (2014; AMD 1 2013; Errata 1 2013; AMD 2 2013; Errata 2

2013; AMD 3 2014; Errata 3-4 2014; AMD 4-6 2014) National Electrical Code

NSF INTERNATIONAL (NSF)

SECTION 32 84 24 Page 4

NSF 14 (2014) Plastics Piping System Components and Related Materials

U.S. GENERAL SERVICES ADMINISTRATION (GSA)

CID A-A-51145 (Rev D; Notice 1; Notice 2) Flux, Soldering, Non-Electronic, Paste and Liquid

UNDERWRITERS LABORATORIES (UL)

UL 651 (2011; Reprint May 2014) Standard for Schedule 40 and 80 Rigid PVC Conduit and Fittings

1.2 DEFINITIONS

a. Year 2000 compliant-means computer controlled facility components that accurately process date and time data (including, but not limited to, calculating, comparing, and sequencing) from, into, and between the twentieth and twentyfirst centuries, and the years 1999 and 2000 and leap year calculations.

1.3 RELATED REQUIREMENTS

Section 23 03 00.00 20 BASIC MECHANICAL MATERIALS AND METHODS, and Section 26 00

00.00 20 BASIC ELECTRICAL MATERIALS AND METHODS, applies to this section, with additions and modifications specified herein.

1.4 SYSTEM DESCRIPTION

This system is designed with a water pressure minimum of indicated maximum of indicated psi at connection to main meter, building, or backflow prevention device (as indicated) and indicated psi at the last head in each zone. If pressure falls above or below indicated values, Contractor shall notify Contracting Officer. For Irrigation Sprinkler System, indicate the following:

a. Head, piping, valve, controller, sensor layout.

b. Pipe, valve, backflow preventer, and controller.

c. Invert elevations. Indicate obstructions interfering with operation.

d. Water source equipment, including existing mains, piping, valves and meters.

e. System and supply pressures.

f. Indicate wiring diagram between existing power source and controller/water pump.

g. Number and extent of control valve circuits.

h. Provide details of all irrigation components and accessories.

1.5 SUBMITTALS

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Government approval is required for submittals with a "G" designation; submittals not having a "G" designation are for information only. When used, a designation following the "G" designation identifies the office that will review the submittal for the Government. The following shall be submitted in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:

SD-02 Shop Drawings

Irrigation sprinkler system

Drawings including irrigation legend prepared by a licensed, registered or certified Landscape Architect or Irrigation Specialist.

SD-03 Product Data

Piping materials, tubing, and fittings

Pipe Sleeve

Submit manufacturer documentation indicating type of recovered materials and the percentage of such material that is (1) recovered and (2) post-consumer recycled content.

Alternately, submit written justification of non-use per Section 01 62 35

RECYCLED/RECOVERED MATERIALS.

Valves and accessories Sprinkler heads Backflow preventers Automatic controller Solvent cement Control wiring Drip irrigation equipment and accessories Water hammer arresters Water meter Rain shut-off device Freeze shut-off device Soil moisture sensor Tapping tee Valve boxes and lids Drip head accessories

SD-05 Design Data

System pressure calculations Irrigation requirements

SD-06 Test Reports

Valves, and accessories tests Backflow preventers Pressure test Operation test

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Including verification of sprinkler head layout

Submit record of pressure tests conducted on recording gage.

SD-07 Certificates

ASSE Series 5000, Submit a certificate of Full Approval or a current Certificate of Approval from FCCCHR List for size, and make of backflow preventer being provided for this project. A Certificate of Provisional Approval will not be acceptable.

Irrigation Contractor Qualification

Submit a copy of the irrigation contractor's certificate of completion from a WaterSense labeled professional certification program.

SD-08 Manufacturer's Instructions

Automatic controller Sprinkler heads

Piping materials

Tubing and fittings.

Valves Solvent cement Control wiring Drip irrigation and accessories Water hammer arresters Water meter Rain shut-off device Freeze shut-off device Soil moisture sensor

Submit mounting details for automatic controllers.

SD-10 Operation and Maintenance Data

Piping materials and fittings, Data Package 2; G Sprinkler heads and accessories, Data Package 2; G Backflow preventers, Data Package 2; G Valves, Data Package 2; G Automatic controller, Data Package 2; G Drip irrigation and accessories, Data Package 2; G Water hammer arresters, Data Package 2; G Water meter, Data Package 2; G Rain shut-off device, Data Package 2; G Freeze shut-off device, Data Package 2; G

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Soil moisture sensor, Data Package 2; G2

Submit operation and maintenance data in accordance with Section 01 78 23 OPERATION AND MAINTENANCE DATA. Include troubleshooting procedures with respect to valve and controller problems.

SD-11 Closeout Submittals

Controller Charts

1.6 DELIVERY, STORAGE, AND HANDLING

1.6.1 Delivery

Deliver materials in original rolls, packages, cartons, and containers with the name of manufacturer, brand, and model. Inspect materials delivered to the site for damage.

1.6.2 Storage

Store materials on site in enclosures or under protective covering. Store plastic piping and rubber gaskets under cover out of direct sunlight. Do not store materials directly on ground. Keep inside of pipes and fittings free from dirt and debris.

1.6.3 Handling

Handle and carry pipe, fittings, valves, and accessories in such a manner as to ensure delivery to trench in sound undamaged condition. Do not drag pipe.

1.7 EXTRA STOCK

a. 2 additional sprinkler heads (nozzles, bodies, screens, pressure compensating devices) of each size and type;

b. 2 valve keys for operating manual valves;

c. 2 wrenches for removing and installing each type of head;

d. 2 quick coupler keys and hose swivels;

e. 4 irrigation controller housing keys.

f. 4 irrigation controller enclosure keys; and

g. 2 hand-held remotes compatible with controller system.

1.8 QUALITY ASSURANCE

1.8.1 Required Test

Submit tests signed by an authorized official of a testing laboratory of sprinkler head, valve, automatic controller, emitter heads, vacuum breaker, backflow preventer, and water hammer arrester.

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1.9 WARRANTY

PART 2 PRODUCTS

2.1 PIPING MATERIALS

2.1.1 Copper Tubing and Associated Fittings

2.1.1.1 Tubing

ASTM B 88, Type K.

2.1.1.2 Fittings

ASME B16.22 and ASME B16.18, solder joint. Solder, ASTM B 32 alloy Grade Sn95 or Sn94. Flux, FS A-A-51145, Type I.

2.1.2 Red Brass Pipe and Associated Fittings

2.1.2.1 Pipe

ASTM B 43, regular.

2.1.2.2 Fittings

ASME B16.15, Class 250, cast bronze threaded.

2.1.3 Galvanized Steel Pipe and Associated Fittings

2.1.3.1 Pipe

ASTM A 53/A 53M, Schedule 40.

2.1.3.2 Fittings

ASME B16.3, Class 150.

2.1.4 Polyvinyl Chloride (PVC) Pipe, Fittings and Solvent Cement

NSF 14, seal of approval for potable water.

2.1.4.1 Pipe

ASTM D 1785, PVC 1120 Schedule 40; or ASTM D 2241, PVC 1120 SDR 21, Class 200. Provide integral lavender-color pipe for non-potable use. Provide ultra-violet resistant piping for on-grade use.

2.1.4.2 Fittings

a. Solvent Welded Socket Type: ASTM D 2466, Schedule 40. Provide lavender-colored fittings. Provide ultra-violet resistant fittings.

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b. Threaded Type: ASTM D 2464, Schedule 80. Provide lavender-colored fittings. Provide ultra-violet resistant fittings.

2.1.4.3 Solvent Cement

ASTM D 2564.

2.1.5 Polyethylene (PE) Plastic Piping

2.1.5.1 Pipe

AWWA C901, outside diameter (od) base with dimension ratio (DR) of 9.3 to provide 150 psi minimum pressure rating.

2.1.5.2 Fittings

ASTM D 3261, DR of 9.3.

2.1.6 Dielectric Fittings

ASTM F 441/F 441M, Schedule 80, CPVC threaded pipe nipples, 4 inch length.

2.1.7 Drip Irrigation Tubing

ASTM D 2287, maximum inside diameter (id) as indicated, vinyl plastic extruded from non-rigid chloride, integrally algae-resistant, homogeneous throughout, smooth inside and outside, free from foreign materials, cracks, serrations, blisters and other effects. Provide slip, barbed or compression fittings.

2.1.8 Pipe Sleeve

a. Provide PVC piping two times the diameter of main or lateral piping.

b. Provide grey PVC electrical conduit sized according to number of control wires. Minimum 2 inch size.

c. Sleeves shall conform to EPA requirements in accordance with Section 01 62 35

RECYCLED/RECOVERED MATERIALS.

2.2 IRRIGATION AND DRIP SPRINKLER HEADS

FS A-A-2745. Provide lavender-colored body, nozzle, and/or cap indicator for non-potable use.

2.2.1 Fixed Riser Irrigation Heads

2.2.1.1 Stream Rotors, Full or Part Circle

Sprinkler body, nozzle, and screen constructed of heavy-duty, ultra-violet resistant plastic. Heavy duty, stainless steel internal construction with plastic body. Provide check valve below each sprinkler body on riser.

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2.2.1.2 Gear Rotor Irrigation Head, Full or Part Circle

Single-stream, water lubricated, gear drive type capable of covering indicated radius and psi with distribution rate of indicated gpm. Part circle sprinkler with an adjustable arc coverage of 30 to 360 degrees. Stainless steel internal construction with plastic body, with matched precipitation rate nozzles in standard /low/ flat angle trajectories, filter screen, reducible watering radius, and choice of nozzles.

2.2.1.3 Impact Irrigation Head

Coverage, psi, distribution rate and pop-up as indicated. Provide one or two nozzles to distribute water, an inlet strainer to prevent debris from clogging nozzles, and non-corrosive plastic head and stainless steel assemblies. Seal bearing assembly from abrasives. Provide entire assembly including strainer removable from top of case without disturbing case installation. Provide plastic housing.

2.2.1.4 Spray Irrigation Heads, Full or Part Circle

Coverage, psi and discharge rate as indicated. Sprinkler body, nozzle, and screen constructed of heavy-duty, ultra-violet resistant plastic. Matched precipitation rate plastic nozzle with an adjustable screw capable of regulating the radius and the flow. Capable of housing under the nozzle; protective, non-clogging filter screen and/or pressure compensating devices. Screen used in conjunction with the adjusting screw from regulating. Provide check valve below each sprinkler body on riser.

2.2.1.5 Adjustable Flood Bubbler Head

Capable of providing the indicated discharge rate at the indicated psi, operating over a pressure range of 10 to 60 psi. Constructed of durable ultra-violet resistant plastic with a plastic inlet filter screen to protect the nozzle against clogging, and a stainless steel adjustable screw, capable of shutting off the bubbler and regulating the flow.

2.2.1.6 Pressure Compensating Flood Bubbler Head

Capable of providing a consistent discharge rate and pressure indicated. Plastic inlet filter screen bubbler assembly to protect the nozzle against clogging. Permanently assembled design constructed of durable, ultra-violet resistant plastic with a integral rubber flow washer for regulating the discharge rate at an operating pressure range of 20 to 90 psi.

2.2.2 Pop-Up Irrigation Head

2.2.2.1 Stream Rotor Irrigation Head, Full or Part Circle

duty, stainless steel internal construction with plastic body. Pop-up height of indicated as measured from top of cap at normal installation to middle of nozzle orifice. Provide check valve in head.

2.2.2.2 Gear Rotor Irrigation Head, Full or Part Circle

duty, stainless steel internal construction with plastic body and match precipitation rates for standard low or flat angle trajectories. Single-stream, water lubricated, gear drive type capable of covering radius and distribution rate indicated. Part circle sprinkler with an adjustable arc coverage of 30 to 360 degrees. Pop-up height as indicated as measured from top of cap at normal installation to middle of

SECTION 32 84 24 Page 11 nozzle orifice. Provide wiper seal that positively seals against nozzle flange to keep debris out of rotor and cleans debris from pop-up steam as it retracts. Provide check valve in head.

2.2.2.3 Impact Irrigation Head

Capable of covering indicated radius at pressure and distribution rate indicated. Provide one or two nozzles to distribute water, an inlet strainer to prevent debris from clogging nozzles, and non-corrosive plastic head and stainless steel assemblies. Seal bearing assembly from abrasives. Provide entire assembly including strainer removable from top of case without disturbing case installation. Provide plastic housing. Pop-up height as indicated as measured from top of cap at normal installation to middle of nozzle orifice.

2.2.2.4 Spray Irrigation Head, Full or Part Circle

Capable of covering indicated radius at pressure and dischard rate indicated. Sprinkler body, nozzle, and screen constructed of heavy-duty, ultra-violet resistant plastic with wiper seal. Plastic nozzle with matched precipitation rate and an adjustable screw capable of regulating the radius and flow. Capable of housing under the nozzle; protective, non-clogging filter screen and/or pressure compensating devices. Screen used in conjunction with the adjusting screw from regulating. Pop-up height indicated as measured from the top of cap at normal installation to middle of nozzle orifice. Provide check valve below each sprinkler body on riser.

2.2.3 Bubbler Irrigation Head

2.2.3.1 Adjustable Flood Bubbler

Capable of providing a discharge rate as indicated operating over a pressure range of 10 to 60 psi.

Construct of durable ultra-violet resistant plastic with a plastic inlet filter screen to protect the nozzle against clogging, and a stainless steel adjusting screw, capable of shutting off the bubbler and regulating the flow. Pop-up height ofas indicated as measured from top of cap at normal installation to middle of nozzle orifice.

2.2.3.2 Pressure Compensating Flood Bubbler

Capable of providing a consistent discharge rate indicated at the pressure indicated. Plastic inlet filter screen bubbler assembly to protect the nozzle against clogging. Permanently assembled design constructed of durable, ultra-violet resistant plastic with an integral rubber flow washer for regulating the discharge rate at an operating pressure range of 20 to 90 psi. Pop-up height as indicated as measured from top of cap at normal installation to middle of nozzle orifice.

2.2.4 Fixed Drip Head

2.2.4.1 Multi-Port Outlet Device

Multi-outlet, pressure compensating emitter manifold that is ultra-violet resistant, algae, and heat resistant, non-corrosive PVC material for above or below grade installation. Integral 200 mesh fabric screen that can be serviced from the top of the unit by unscrewing the top cap. Six, eight, or twelve, top mounted outlet ports that will accept 1/8 ot 1/4 inch vinyl tubing as indicated. The ports can be accessed through the top of the unit by unscrewing the lid from the base. Each outlet port accepts a pressure compensating emitter controlling the flow from 0.5 to 24.0 gph per outlet. Operating range of unit is 15 to 50 psi with 1/2 inch female national pipe thread (FNPT) inlet.

SECTION 32 84 24 Page 12

Multi-outlet, pressure-compensating emitter constructed of a ultra-violet resistant algae and heat resistant, non-corrosive PVC material. Diaphragm/flap constructed of a silicone elastomer material.

Pressure-compensated emitter with each outlet delivers a nominal flow as indicated at 15 to 50 psi.

Three, four, or six barbed outlet unit that will accept 1/8 or 3/4 inch vinyl tubing with continuous "self flushing" emitter feature.

2.2.4.2 Single Outlet Pressure Compensating Emission Device

Pressure compensated emitter body constructed of ultra-violet, algae, heat resistant and chemical resistant, non-corrosive PVC material. Diaphragm constructed of a silicone elastomer material.

Capable of delivering a nominal flow rate indicated at a pressure range of 15 to 50 psi. A self piercing inlet barb type 1/2 inch female national pipe thread (FNPT) inlet mounted onto a 1/2 inch male national pipe thread (MNPT) riser. Barbed emitter outlet configuration that will accept 1/8 or 1/4 inch vinyl tubing.

2.2.4.3 Microspray Device

Capable of covering 0 to 15 feet radius at indicated psi with the discharge rate indicated with overall pop-up height of indicated. Sprinkler body, nozzle, and screen constructed of heavy-duty, ultra-violet resistant plastic with wiper seal on sprinkler. Matched precipitation rate plastic nozzle with an adjustable screw capable of regulating the radius and flow and capable of housing under the nozzle;

protective, non-clogging filter screens and/or pressure compensating devices. Screen used in conjunction with the adjusting screw for regulating. Mount with 1/2 inch female national pipe thread (FNPT) adapter poly flex riser stake.

2.2.4.4 In-Line Tubing Device

Factory installed, heavy-walled flexible polyethylene (PE) tubing, pressure compensating, self-cleaning emitters at spacings indicated. Emitter flow and inlet pressure flow indicated. Tubing diameter of size indicated.

2.2.5 Pop-Up Drip Head

Capable of covering 0 to 15 feet radius at indicated psi with a discharge rate indicated with overall pop-up height as indicated. Sprinkler body, steam, nozzle, and screen constructed of heavy-duty, ultra-violet resistant plastic with wiper seal on sprinkler. Provide a heavy-duty, stainless steel retract spring for positive pop-down and a racheting system for easy alignment of the pattern. Matched precipitation rate plastic nozzle with an adjusting screw capable of regulating the radius and flow and capable housing under the nozzle; protective, non-clogging filter screens and/or pressure compensating devices.

Screen used in conjunction with the adjusting screw for regulating. A side and bottom 1/2 inch female national pipe thread (FNPT) inlet for the 6 or 12 inch modelindicated. Mount with 1/2 inch female national pipe thread (FNPT) adapter poly flex riser stake.

2.3 VALVES

Provide lavender-colored assembly for non-potable use.

2.3.1 Isolation Valve

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2.3.1.1 Ball Valves, Less than 3 Inches

API Std 598, plastic body, threaded ends.

2.3.1.2 Gate Valves, 3 Inches and Larger

AWWA C500, bottom wedging double discs, parallel seats, non-rising stems, open by counterclockwise turning. Provide flanged end connections. Provide bronze interior construction of valves including stem containing a maximum 2 percent aluminum and maximum 16 percent zinc.

2.3.2 Control Valves

2.3.2.1 Pressure Regulating Master Control Valve

Automatic mechanical self-cleaning, self-purging control system having an adjustable pressure setting operated by a solenoid on alternating current (ac) with indicated amperes at 24 volts. Valve shall close slowly and be free of chatter in each diaphragm position. Provide a manual flow stem to adjust closing speed and internal flushing. Provide an adjusting screw for setting pressure and schrader valve for monitoring pressure. Provide one or two inlet tappings capable of being installed as a straight pattern valve. Provide heavy duty brass valve body with brass seat that is removable and serviceable from top without removing valve body from system. Maximum working pressure of valve is 150 psi and pilot range from 10 to 125 psi.

2.3.2.2 Remote Control Valve, Electrical

Solenoid actuated globe or angle valves of 3/4 to 3 inch size, alternating current (ac), 60/50 cycle amps indicatedin rush current and indicated holding current. Provide brass or plastic (as indicated) valve housing suitable for service at 150 psi operating pressure. Provide pressure regulating module capable of regulating outlet pressure between 15 to 25 psi (+/-) 5 psi and adjustable screw for setting pressure schrader valve connection for monitoring pressure.

2.3.2.3 Manual Angle Control Valve, Manual Globe Control Valve

Less than 2 1/2 inch MSS SP-80, type 3, Class 150 threaded ends. Angle or globe (as indicated) valve 2 1/2 inch and larger MSS SP-85, Type II, Class 250 threaded ends.

2.3.3 Quick Coupling Valves

Two piece unit consisting of a coupler water seal valve assembly and a removable upper body to allow spring and key track to be serviced without shutout of main. Provide brass parts. Provide lavender, vinyl or rubber lockable lids with springs for positive closure on key removal.

2.3.4 Hose Bib

One piece consisting of all brass construction with full flow hose connection outlet and removable key handle with gaskets and washers.

2.3.5 Drain Valves

2.3.5.1 Manual

SECTION 32 84 24 Page 14

MSS SP-80, Type 3, Class 150 threaded ends for sizes less than 2 1/2 inches. MSS SP-85, Type II, Class 250 flanged ends for sizes 2 1/2 inches and larger.

2.3.6 Backflow Preventers

2.3.6.1 Reduced Pressure Type Backflow Preventers

AWWA C511. Provide backflow preventers complete with 150 psi rated flanged, bronze or brass mounted gate or ball valve and strainer, 304 stainless steel or bronze, internal parts. Total pressure drop through complete assembly shall be a maximum of 10 psi at rated flow. Listing of particular make, model/design, and size in FCCCHR List will be acceptable as required proof for testing and certification.

a. Piping Assembly: Galvanized steel pipe and fittings.

b. Strainers: Bronze or brass construction with gasket caps. Equip units with No. 200 mesh stainless steel screen elements.

2.3.6.2 Pressure Type Vacuum Breaker

ASSE 1020 bronze or brass construction, with one or two check valves, vacuum relief, inlet and discharge shut-offs valves, and field test cocks, and with vacuum relief opening of greater diameter than unit.

2.3.6.3 Atmospheric Vacuum Breaker

AWWA M14, vacuum relief, inlet and discharge openings, and with vacuum relief opening of greater diameter than unit.

2.4 ACCESSORIES AND APPURTENANCES

2.4.1 Tapping Tee

Bronze flat, double strap, with neoprene gasket or "O"-ring seal.

2.4.2 Water Meter

Meter to include roll sealed register, magnetic drive, straight reading (odometer shall indicate in gallons, large numerals, glass lens for legibility,) low flow indicator to detect leaks, tamper proof seal pin to detect theft; sturdy durable, corrosion resistant main case, electrical grounding continuity;

nutating disc measuring chamber with minimum head loss.

2.4.3 Drip Head Accessories

2.4.3.1 Strainer

Provide strainer at inlet to each drip control valve assembly. Provide polyester fabric screen attached to a PVC frame having the equivalent of 200 mesh filtration capacity. Compact "Y" body and cap configuration. Incorporate flush valves within strainer to clean screen without disassembling unit.

SECTION 32 84 24 Page 15

2.4.3.2 Riser Adapters

PVC material, threaded barbed or soldered to attached drip heads to tubing, pop-up irrigation body, or rigid piping and tubing to rigid piping.

2.4.3.3 Tubing Stakes

Plastic, plastic coated steel, or other non-corrosive strong material to secure tubing.

2.4.3.4 Bug Cap

Provide check valves at end of each emitter outlet distribution line. Valves shall permit free flow of water with minimum restriction; prevent back siphoning, entry of insects, and contamination into outlet ports.

2.4.3.5 Sub Terranean Drip Box and Cover

Construct of ultra-violet resistant PVC. Two slots in bottom of box to allow for installation of distribution tubing onto the emission device.

2.4.3.6 Line Flushing Valve

Construct of PVC with maximum flow rate of 15 gpm with minimum flushing water volume of one gallon at a minimum 4 psi to a maximum 25 psi at a point of discharge.

2.4.3.7 Valve Boxes

plastic valve box for each isolation valve, control valve, quick coupling valve and drain valve. Provide box sizes that are suitable and adjustable for valve used.

a. Cast the word "IRRIGATION" on cover.

b. Stencil, engrave, or brand controller and valve sequence on remote control valve cover.

Letters minimum 4 inches height.

2.4.4 Backflow Preventer Accessories

2.4.4.1 Pressure Gages

ASME B40.100, single style pressure gage for water with 4 1/2 inch dial, brass or aluminum case, bronze tube, gage cock, pressure snubber, and siphon. Provide scale range suitable for irrigation systems.

2.4.4.2 Water Hammer Arresters

ASSE 1010; stainless steel construction with an encased and sealed bellows compression chamber.

2.4.4.3 Backflow Preventer Enclosure

Frame to be constructed of 3/16 inch stainless steel angle iron with 1 1/2 inch No. 9 expanded metal covering. Construct in a one piece single swing or two piece double hinge configuration. Provisions

SECTION 32 84 24 Page 16 for pad locking and lighting handles. Size to fit backflow assembly to installed. Color to be green.

Lock for enclosure provided by others.

2.4.4.4 Concrete Pads

Cast-in-place reinforced concrete construction for reduced pressure type backflow preventers.

2.4.5 Moisture Sensing Device

2.4.5.1 Automatic Rain Shut-Off Device

One piece, maintenance and adjustment free, reacts to a minimum 1/8 inch of rain water, unaffected by humidity levels, commercial grade materials, no exposed mechanical switch or electrodes, solid state construction with internal relay operating voltage of, static charge pretested, maximum switch current of.

2.4.5.2 Automatic Freeze Shut-Off Device

Construct of a PVC cylinder with a sensing element mounted at top of cylinder capable of interrupting the control valve common wire as temperatures approach 32 degrees F. Operating voltage 24 VAC, maximum current. Static charge protection with snubber network.

2.4.5.3 Soil Moisture Sensor Device

24 VAC, field adjustable and capable of interrupting irrigation cycles for pre-determined moisture level at moisture probe location. Waterproof field adjustment module with bypass switch.

2.4.6 Air/Vacuum Relief

Construct of PVC with a maximum operating pressure of 140 psi.

2.4.7 Water Booster Package

Booster pump package to be a prefabricated system, pre-piped, pre-wired and mounted on a steel skid base minimum 3 inch welded angle iron or channel brackets, hot dipped galvanized, with a minimum 9/16 inch holes at each corner for bolting to concrete with anchors. Field assembled pump systems are not acceptable.

2.4.7.1 Pump

Pump to be end suction close coupled or in-line type, bronze impeller and wear rings, bronze shaft sleeve, mechanical seal with high-resist seat, integral flanged suction and discharge connections, keyed motor shaft, back pull-out type, with centerline discharge for automatic venting and Type 304 stainless steel internal parts and fittings.

2.4.7.2 Motor

Motor to be size and phase indicated, ball bearing design, stainless steel shaft, non-over loading on full range of the impeller curve without use of the service factor and including rodent and insect screens over the openings. Single phase motors to be totally enclosed fan cooled and open drip-proof with a

SECTION 32 84 24 Page 17 minimum 1.15 service factor. Three phase motors to be totally enclosed fan cooled, open drip-proof with a minimum 1.15 service factor.

2.4.7.3 Piping and Fittings

Piping and fittings to be flanged spools of Schedule 40 steel and Class 150 weld flanges, hot dipped galvanized after fabrication. Spacer spools to be welded and galvanized. Companion flanges at suction and discharge header connections to be Schedule 40 steel and galvanized.

2.4.7.4 Gages

Gages shall be 2 1/2 inch diameter, liquid filled for vibration dampering, 0-200 pounds, stainless steel casing, with brass needle valve shut-off cocks.

2.4.7.5 Butterfly Valve

Butterfly valves and adjustable handles to be sandblasted and epoxy coated, nuts and bolts to be cad plated, shut off valves to be centerline butterfly lug type, wafer style, drilled and tapped, with bronze disc, capable of remaining installed in the piping.

2.4.7.6 Check Valves

A combination pressure reducing and non-slam check valve to be installed with booster pump package to reduce effect of varying suction pressure.

2.4.7.7 Pump Control Panels

Pump control panels to be 14 gage type UF, type 304 stainless steel with continuous welded seams, door with continuous hinge, all welds passivated to eliminate corrosion, UL listed, NEMA 3R enclosure with holes in bottom to allow for all inlet wiring for main power control accessories and louvers with insect screens on opposite sides for cross ventilation, deadfront, keylockable and padlockable, with main disconnect switch, circuit breaker with adjustable overloads on all legs and adjustable inrush current trip setting on units exceeding 41 amps, heavy duty contactor, 115 volt control circuit transformer with circuit breaker disconnect. A plug-in module type pump start relay shall be mounted and hard wired in the pump panel. A electronic flow switch with 0-60 seconds adjustable time delay relay, mounted and hard wired in the pump panel, to operate as a no-flow safety shut down. NEMA 3R non-fused main disconnect switch, mounted on exterior of pump panel, hard wired to panel circuit breaker.

2.4.8 Flow Meter

Flow meter of size indicated, female national pipe threaded ends and replaceable metering insert. 9 volt direct current output with a pulse rate which is proportional to the gpm, a 0.067 amperes fuse link to protect metering insert and 14 gage output feeder wire to be powered by the controller. Provide brass meter housing suitable for service at 150 psi operating pressure.

2.5 AUTOMATIC CONTROLLER ELECTRICAL, SOLAR OR BATTERY

Controller, NEMA ICS 2 with 120-volt single phase service; 24 VAC sola; r 24 VDC solar; or 24 VDC battery (as indicated), operating with indicated station, and grounded chassis. Provide enclosure NEMA ICS 6 Type 3R, with locking hinge cover, wall or pedestal mounted as indicated.

SECTION 32 84 24 Page 18

2.5.1 Controller Features

a. Station controller size as indicated with indicated independent programs that can run concurrently.

b. Allows an infinite number of cycles per day by placing the program in a looping mode.

c. Ability to be programmed in one second increments, from one second to 24 minutes.

d. A water budgeting capability in all stations within a program in one percent increments from one percent to 255 percent.

e. A programmable watering calendar ranging from one to 16 days.

f. A single-station timed manual feature that allows a station to be turned on manually for its programmed watering time.

g. A semi-automatic manual cycle feature.

h. A true manual operation with safety shut-off at midnight and indicate which station is on by means of L.E.D.S.

i. UL listed, having a re-settable circuit breaker, cadmium plated, weatherproof steel case, and keyed lock.

2.6 ELECTRICAL CIRCUITS

2.6.1 Control Wiring for Electrically Operated Valves

NFPA 70, copper conductor 14 gage wire, Type UF.

2.6.2 Conduit

UL 651, rigid polyvinyl chloride conduit, Schedule 40.

2.7 CONCRETE MATERIALS

2500 psi compressive concrete strength at 28 days as specified under Section 03 30 00 CAST-IN-

PLACE CONCRETE.

PART 3 EXECUTION

3.1 INSTALLATION

Install sprinkler system after site grading has been completed.

Per Executive Order 13423, the irrigation contractor shall be certified through a WaterSense labeled program (http://www.epa.gov/watersense/pp/cert_programs.htm).

SECTION 32 84 24 Page 19

3.1.1 Trenching

Hand trench around roots to pipe grade when roots of 2 inches diameter or greater are encountered.

Make width of trench 4 inches minimum or 1 1/2 times diameter of pipe, whichever is wider. Backfill and hand tamp over excavation. When rock is encountered, excavate 4 inches deeper and backfill with silty sand (SM) or well-graded sand (SW) to pipe grade. Keep trenches free of obstructions and debris that would damage pipe. Do not mix subsoil with topsoil. Bore under existing concrete walks, drives and other obstacles at a depth conforming to bottom of adjacent trenches. Install pipe sleeve, two pipe diameters larger than sprinkler pipe, to fill bore. If rock is encountered., excavate 4 inches deeper and backfill with silty sand (SM) or well graded sand (SW) to pipe grade. Prior to backfilling of trench, Contracting Officer shall verify and approve location of all irrigation heads.

3.1.2 Piping System

3.1.2.1 Clearances

a. Minimum horizontal clearances between lines: 4 inches for 2 inch pipe and less; 12 inches for 2 inch pipe and more.

b. Minimum vertical clearances between lines: One inch.

3.1.2.2 Minimum Pitch

Down 6 inches per 100 feet in direction of drain valves.

3.1.2.3 Thrust Blocks

Install thrust blocks at bends, tees, plugs and valves or 2 1/2 inches and larger mainline piping. Place concrete so that sides subject to thrust or load are against undisturbed earth, and valves and fittings are serviceable after concrete has set.

3.1.2.4 Minimum Backfill Cover

a. 18 inches for pressure mainline pipe and valve control wire.

b. 12 inches for non-pressure lateral pipe.

c. 24 inches for all piping under paved or non-paved pedestrian paths.

d. 36 inches for all piping under traffic loads, farm operations, freezing temperatures.

e. Install pipe sleeves at depths indicated in "c" and "d".

If rock is encountered provide minimum 4 inches of silty sand (SM) or well graded sand (SW) cover on top of all piping. Fill remainder of trench or pipe cover to within 3 inches of top with excavated soil, and compact soil with plate hand-held compactors to same density as undisturbed adjacent soil.

3.1.2.5 Restoration

SECTION 32 84 24 Page 20

Fill top 3 inches with topsoil and compact with same density as surrounding soil. Restore turf and plants according to Section 32 92 19 SEEDING, Section 32 92 23 SODDING, Section 32 93 00 EXTERIOR PLANTS. Restore pavements if required.

3.1.2.6 Sterilization

Sprinkler system fed from a potable water system sterilized upstream of backflow preventer in accordance with AWWA C651. Sterilize new water lines for a minimum of 24 hours to meet health test requirements before placing in service. Minimum retention period shall be 3 hours.

3.1.3 Piping Installation

3.1.3.1 Polyvinyl Chloride (PVC) Pipe

a. Solvent-Cemented Joints: ASTM D 2855.

b. Threaded Joints: PPI TN8/8; full cut with a maximum of three threads remain exposed on pipe and nipples. Make threaded joints tight without recourse to wicks or fillers, other than polytetrafluoroethylene thread tape.

c. Piping: ASTM D 2774 or ASTM D 2855, and pipe manufacturer's instructions. Install pipe in a serpentine (snaked) manner to allow for expansion and contraction in trench before backfilling. Install pipes at temperatures over 40 degrees F.

3.1.3.2 Soldered Copper Tubing

Ream pipe and remove burrs. Clean and polish contact surfaces of joint. Flux both male and female ends. Insert end of tube into fittings full depth of socket. After soldering, a solder bead shall show continuously around entire joint circumference. Remove excess acid flux from tubings and fittings.

3.1.3.3 Threaded Brass or Galvanized Steel Pipe

Prior to installation ream pipe. Cut threads as specified in ASME B1.2. Make joints with pipe joint compound applied to male end only.

3.1.3.4 Polyethylene (PE) Pipe and Drip Tubing

Bury drip tubing and PE pipe 12 inches deep. Solvent weld, compression connection, or barbed connection (as indicated) in accordance with manufacturers recommendation. Install hose in serpentine manner. When cutting hose, use a shearing tool such as a pipe cutter, knife or shears. Use only manufacturer's recommended tool and procedure when installing drip heads.

3.1.3.5 Dielectric Protection

Where pipes of dissimilar metal are joined, make connection with dielectric fitting.

3.1.4 Irrigation Heads

Install plumb and level with terrain.

SECTION 32 84 24 Page 21

3.1.4.1 Fixed Riser Irrigation Heads

Nozzle mounted on fixed riser minimum 6 inches above grade in mulched planter beds, 12 inches above grade in planter beds with groundcover. Provide swing joint assembly attachment between lateral lines and fixed risers.

3.1.4.2 Pop-Up Irrigation Head

Install plumb and level with terrain. Provide swing joint assembly attachment between lateral line and pop-up body. Top of irrigation head shall be flush wit surrounding finish grade. In recreational fields, install all pop-up rotors with stainless steel risers 5 inches below finish grade per manufacturer's recommendations.

3.1.4.3 Drip Heads

Install drip heads. Connect drip head to a rigid PVC nipple; drip head stake; or directly to tubing as indicated. Attach tubing to barbed fitting and daylight distribution tubing at rootball secured with stake. Add bug cap at end of secured distribution tubing. After installing drip heads and before operating system, open end of drop lateral and flush lines clean. The number of drip heads on a line shall not exceed manufacturer's recommendations for that hose or distribution tubing size and length.

3.1.5 Valves

3.1.5.1 Isolation Valves

Install in a valve box extending from grade to below valve body, with a minimum of 4 inches cover measured from finish grade to top of valve stem.

3.1.5.2 Control Valves

Plumb valve in a valve box extending from grade to below valve body, with minimum of 4 inch cover measured from grade to top of valve. Install automatic valves beside sprinkler heads with a valve box.

3.1.5.3 Quick Coupling Valves

Install in a valve box extending from grade to below valve body, with a minimum of 4 inches cover measured from finish grade to top of valve stem; or Install 2 inches above finish grade in planter bed, level with finish grade in turf areas as indicated.

3.1.5.4 Hose Bibb

Install as indicated above grade or below grade in valve box with support.

3.1.5.5 Drain Valves

Entire system shall be manually or automatically drainable. Equip low point of each underground line with drain valve draining into an excavation containing gravel. Cover gravel with building paper.

Backfill with excavated material and 6 inches of topsoil.

3.1.6 Backflow Preventers

SECTION 32 84 24 Page 22

a. Install backflow preventer in new connection to existing water distribution system, between connection and control valves. Install with concrete pads. or install with concrete pads in turf only if indicated.

b. Flush pipe lines prior to installing device.

c. Device shall not be installed in pits or where any part of the device could become submerged in standing water

d. Install device a minimum of 12 inches from trees, walls, fences, structures and other obstructions.

3.1.6.1 Reduced Pressure Backflow Preventer

a. Protect device by a strainer located upstream.

b. Install device a minimum of 12 inches between finish grade and bottom of relief port.

c. Where freezing conditions occur, locate device inside a building and pipe the relief valve port through an air gap to a drain.

d. Install water meter above grade, upstream of unit of unit as a part of assembly. Provide galvanized steel support with concrete footing.

3.1.6.2 Pressure Vacuum Breaker

a. Install device a minimum of 12 inches between highest irrigation head and bottom of air relief valve.

b. Where freezing conditions occur, locate device inside a building and pipe the relief valve port through an air gap to a drain.

3.1.6.3 Atmospheric Vacuum Breaker

Install device minimum of 12 inches between highest irrigation head and bottom of relief valve located downstream of irrigation control valve.

3.1.7 Accessories

3.1.7.1 Connection To Existing Water Supply Systems (Tapping Tee)

Use tapping or drilling machine valve and mechanical joint type sleeves for connections to be made under pressure. Bolt sleeves around mains; bolt valve conforming to AWWA C500 to the branch.

Open valve, attach drilling machine, make tap, close valve, and remove drilling machine, without interruption of service. Notify Contracting Officer in writing at least 15 days prior to the date the connections are required; receive approval before any service is interrupted. Provide materials required to make connections into the existing water supply systems and perform excavating, backfilling, and other incidental labor as required. Furnish the labor and the tapping or drilling machine for making the actual connections to the existing systems.

SECTION 32 84 24 Page 23

3.1.7.2 Water Meter

Install meter upstream of backflow preventer per manufacturer's recommendations and local PWC Utility Department Instructions. Plumb meter in a valve box extending from grade to below meter body, with a minimum of 4 inch cover measured from top of grade to top of meter.

3.1.7.3 Valve Boxes and Lids

a. Install with Indicated amount or pea gravel sump below valve.

b. Support valve box with brick or concrete block.

c. Provide wire screen between gravel sump and bottom of valve body for rodent protection.

d. For turf areas, install flush with finish grade.

e. For planter beds, install 2 inches above finish grade.

f. For sloped conditions, install valve box level with terrain.

3.1.7.4 Backflow Preventer Enclosure

a. Install with concrete pad.

b. Place hinges so direction of swing will not conflict with other site features.

3.1.7.5 Rain and Freeze Shut-Off Devices

a. Install as per manufacturer's recommendations.

b. For wall mounted controllers, attach devices to side of building or eave, minimum 8 feet above finish grade and a minimum of 12 inches from building wall or eave.

c. For pedestal mounted controllers, mount as indicated.

3.1.7.6 Soil Moisture Sensing Device

a. Bury the device at depth per manufacturer's recommendation in the effective root zone of hydrozone to be monitored.

b. Place a sensor-protection valve box with cover above the device.

c. Provide waterproof connection to all field splices in valve boxes.

3.1.7.7 Air/Vacuum Relief Valve

Locate at highest point in piping system.

3.1.8 Electrical Circuits

SECTION 32 84 24 Page 24

Bury wires beside mainline pipe in same trench. Provide grey electrical conduit where wires run under paved or non-paved pedestrian paths and vehicular roads. Tag wires at controller and control valve location with plastic tie wrapped tags. Provide one control wire to each control valve location and one common wire looped from controller to each control valve. provide one separate control valve wire of a different color from controller to each control valve cluster.

3.1.8.1 Loops

Provide a 12 inch loop of wire at each valve where controls are connected.

3.1.8.2 Expansion and Contraction

Bundle multiple tubes or wires and tape together at 10 foot intervals with 12 inch loop for expansion and contraction.

3.1.8.3 Splices

Make electrical splices waterproof. Locate all field electrical splices in valve boxes.

3.1.9 Automatic Controller

Determine exact location of controllers in field before installation. Coordinate the electrical service to these locations. Install in accordance with manufacturer's recommendations and NFPA 70.

3.1.10 Flushing

After piping, risers, and valves are in place and connected, but prior to installation of sprinkler heads and valves, flush piping system under a full head of water. Maintain flushing for 3 minutes.

3.1.11 Adjustment

After grading, plant installation, and rolling of planted areas, adjust sprinkler heads flush with finished grade. Make adjustments by providing new nipples of proper length or by use of heads having an approved device, integral with head, which will permit adjustment in height of head without changing piping.

3.1.12 Sterilization

Sprinkler system fed from a potable water system shall be sterilized upstream of backflow preventer in accordance with AWWA C651. Sterilize new waterlines for a minimum of 24-hours, to meet local, health test requirements before placing in service. Minimum retention period shall be 3 hours.

3.2 FIELD QUALITY CONTROL

The Contractor will conduct and the Contracting Officer and the QC representative will witness field inspections and field tests specified in this section. Perform field tests, and provide labor, equipment, and incidentals required for testing.

3.2.1 Pressure Test

SECTION 32 84 24 Page 25

3.2.1.1 Duration

During pressure test, maintain a hydrostatic pressure of 150 psi without pumping for a period of one hour with an allowable pressure drop of 5 psi before backfilling system.

3.2.1.2 Leaks

Correct leaks. Make necessary corrections to stop leakage.

3.2.1.3 Retest

Retest system twice until pressure can be maintained for duration of test.

3.2.2 Operation Test

3.2.2.1 Accessories

At conclusion of pressure test, install irrigation heads or drip heads, quick coupling assemblies, and hose bib, and test entire system for operation under normal operating pressure. Make necessary corrections or adjustments to raise or lower pressure for each system if tests results do not match pressure requirements.

3.2.2.2 Acceptance

Operation test is acceptable if system operates through at least one complete cycle for areas to be irrigated.

3.2.3 Controller Charts

Provide one chart for each controller supplied. Indicate in chart area controlled by automatic controller.

The chart is a reduction of the actual plans that will fit the maximum dimensions inside controller housing. Use black line print for chart and a different pastel or transparent color to indicate each station area of coverage. After chart is completed and approved for final acceptance, seal chart between two 20 mil pieces of clear plastic.

-- End of Section --

SECTION 32 84 24 Page 26

1.9 WARRANTY