Attachment N - UFGS 32 84 23 Underground Sprinkler Systems.pdf

SECTION 32 84 23 Page 1

SECTION TABLE OF CONTENTS

DIVISION 32 - EXTERIOR IMPROVEMENTS

SECTION 32 84 23

UNDERGROUND SPRINKLER SYSTEMS

04/08

Table of Contents 04/08

PART 1 GENERAL

1.1 REFERENCES

1.2 SYSTEM DESCRIPTION

1.3 SUBMITTALS

1.4 DELIVERY, STORAGE, AND HANDLING

1.5 EXTRA MATERIALS

PART 2 PRODUCTS

2.1 MATERIALS AND EQUIPMENT

2.2 PIPING MATERIALS

2.3 SPRINKLER AND EMITTER HEADS

2.4 VALVES

2.5 ACCESSORIES AND APPURTENANCES

2.6 AUTOMATIC CONTROLLERS, ELECTRICAL

2.7 ELECTRICAL WORK

2.8 CONCRETE MATERIALS

2.9 WATER SUPPLY MAIN MATERIALS ......... Error! Bookmark not defined.

2.10 INSULATING JOINTS

PART 3 EXECUTION

3.1 EXAMINATION

3.2 INSTALLATION

3.3 FRAMED INSTRUCTIONS

3.4 FIELD TRAINING

3.5 FIELD TESTS

3.6 CLEANUP

SECTION 32 84 23 Page 2

SECTION 32 84 23

UNDERGROUND SPRINKLER SYSTEMS

04/08

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 SOCIETY OF MECHANICAL ENGINEERS (ASME)

ASME B1.2 (1983; Errata 1992; R 2017) Gages and

Gaging for Unified Inch Screw Threads

ASME B16.3 (2016) Malleable Iron Threaded Fittings, Classes 150 and 300

ASME B16.15 (2018) Cast Copper Alloy Threaded Fittings

Classes 125 and 250

ASME B16.18 (2018) Cast Copper Alloy Solder Joint

Pressure Fittings

ASME B16.22 (2018) Standard for Wrought Copper and

Copper Alloy Solder Joint Pressure Fittings

ASME B40.100 (2013) Pressure Gauges and Gauge

Attachments

AMERICAN SOCIETY OF SANITARY ENGINEERING (ASSE)

ASSE 1012 (2009) Performance Requirements for

Backflow Preventer with an Intermediate

Atmospheric Vent - (ANSI approved 2009)

ASSE 1013 (2011) Performance Requirements for

Reduced Pressure Principle Backflow

Preventers and Reduced Pressure Fire

Protection Principle Backflow Preventers -

(ANSI approved 2010)

ASSE 1020 (2020) Performance Requirements for

Pressure Vacuum Breaker Assemblies

AMERICAN WATER WORKS ASSOCIATION (AWWA)

AWWA C509 (2015) Resilient-Seated Gate Valves for

Water Supply Service

AWWA C606 (2015) Grooved and Shouldered Joints

AWWA C901 (2017) Polyethylene (PE) Pressure Pipe and

Tubing, 3/4 In. (19mm) Through 3 In. (76 mm), for Water Service

SECTION 32 84 23 Page 3

ASTM INTERNATIONAL (ASTM)

ASTM A53/A53M (2020) Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless

ASTM A183 (2014; R 2020) Standard Specification for

Carbon Steel Track Bolts and Nuts

ASTM A536 (1984; R 2019; E 2019) Standard

Specification for Ductile Iron Castings

ASTM B32 (2008; R 2014) Standard Specification for

Solder Metal

ASTM B43 (2020) Standard Specification for Seamless

Red Brass Pipe, Standard Sizes

ASTM B88 (2020) Standard Specification for Seamless

Copper Water Tube

ASTM B88M (2020) Standard Specification for Seamless

Copper Water Tube (Metric)

ASTM D1785 (2015; E 2018) Standard Specification for

Poly(Vinyl Chloride) (PVC), Plastic Pipe, Schedules 40, 80, and 120

ASTM D2000 (2018) Standard Classification System for

Rubber Products in Automotive Applications

ASTM D2241 (2015) Standard Specification for

Poly(Vinyl Chloride) (PVC) Pressure-Rated

Pipe (SDR Series)

ASTM D2287 (2019) Nonrigid Vinyl Chloride Polymer and

Copolymer Molding and Extrusion Compounds

ASTM D2464 (2015) Standard Specification for Threaded

Poly(Vinyl Chloride) (PVC) Plastic Pipe

Fittings, Schedule 80

ASTM D2466 (2017) Standard Specification for

Poly(Vinyl Chloride) (PVC) Plastic Pipe

Fittings, Schedule 40

ASTM D2564 (2012) Standard Specification for Solvent

Cements for Poly(Vinyl Chloride) (PVC)

Plastic Piping Systems

ASTM D2774 (2012) Underground Installation of

Thermoplastic Pressure Piping

ASTM D2855 (2015) Standard Practice for Making

Solvent-Cemented Joints with Poly(Vinyl

Chloride) (PVC) Pipe and Fittings

ASTM D3261 (2016) Standard Specification for Butt

Heat Fusion Polyethylene (PE) Plastic

Fittings for Polyethylene (PE) Plastic

SECTION 32 84 23 Page 4

Pipe and Tubing

ASTM F441/F441M (2020) Standard Specification for

Chlorinated Poly(Vinyl Chloride) (CPVC)

Plastic Pipe, Schedules 40 and 80

FOUNDATION FOR CROSS-CONNECTION CONTROL AND HYDRAULIC RESEARCH

(FCCCHR)

FCCCHR Manual (10th Edition) Manual of Cross-Connection

Control

MANUFACTURERS STANDARDIZATION SOCIETY OF THE VALVE AND FITTINGS

INDUSTRY (MSS)

MSS SP-80 (2019) Bronze Gate, Globe, Angle and Check

Valves

MSS SP-85 (2011) Gray Iron Globe & Angle Valves

Flanged and Threaded Ends

NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION (NEMA)

NEMA ICS 2 (2000; R 2005; Errata 2008) Industrial

Control and Systems Controllers, Contactors, and Overload Relays Rated 600 V

NEMA ICS 6 (1993; R 2016) Industrial Control and

Systems: Enclosures

NATIONAL FIRE PROTECTION ASSOCIATION (NFPA)

NFPA 70 (2020; ERTA 20-1 2020; ERTA 20-2 2020; TIA

20-1; TIA 20-2; TIA 20-3; TIA 20-4)

National Electrical Code

PLUMBING AND DRAINAGE INSTITUTE (PDI)

PDI WH 201 (2010) Water Hammer Arresters Standard

U.S. GENERAL SERVICES ADMINISTRATION (GSA)

CID A-A-51145 (Rev D; Notice 1; Notice 2; Notice 3)

Flux, Soldering, Non-Electronic, Paste and

Liquid

1.2 SYSTEM DESCRIPTION.

1.3 SUBMITTALS.

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 government officer that will review the submittal for the Government.

SD-02 Shop Drawings

Sprinkler System

SECTION 32 84 23 Page 5

SD-03 Product Data

Framed Instructions

Field Training

Sprinkler System

Spare Parts

Design Analysis and Calculations

SD-06 Test Reports

Field Tests

SD-07 Certificates

Sprinkler System

SD-10 Operation and Maintenance Data

Sprinkler System; G, COR

1.4 DELIVERY, STORAGE, AND HANDLING.

Protect all equipment delivered and placed in storage from the weather, excessive humidity, and temperature variation; direct sunlight (in the case of plastic or rubber materials); and dirt, dust, or other contaminants.

1.5 EXTRA MATERIALS.

Submit spare parts data for each different item of material and equipment specified, after approval of the related submittals and not later than the start of the field tests. Include with the data a complete list of parts and supplies, with current unit prices and source of supply.

PART 2 PRODUCTS.

2.1 MATERIALS AND EQUIPMENT.

2.1.1 Standard Products

Provide materials and equipment which are the standard products of a manufacturer who has produced similar systems that have performed well for a minimum period of 2 years prior to bid opening. Equipment shall be supported by a service organization that is, in the opinion of the

Contracting Officer, reasonably convenient to the site.

2.1.2 Nameplates

Each item of equipment shall have the manufacturer's name, address, type or style, model or serial number, and catalog number on a plate secured to the item of equipment.

2.1.3 Additional Stock

Provide the following extra stock: Two sprinkler heads of each size and type, two valve keys for operating manual valves, two wrenches for removing and installing each type of head, two quick coupler keys and hose swivels, and four irrigation controller housing keys.

2.2 PIPING MATERIALS.

SECTION 32 84 23 Page 6

NOTE: Select piping materials according to project requirements. Verify soil and water conditions onsite, use proper materials where corrosion problems exist.

2.2.1 Copper Tubing and Associated Fittings

Tubing shall conform to requirements of ASTM B88M ASTM B88, Type K.

Fittings shall conform to ASME B16.22 and ASME B16.18, solder joint.

Solder shall conform to ASTM B32 95-5 tin-antimony. Flux shall conform to

CID A-A-51145, Type I. Grooved mechanical joints and fittings shall be designed for not less than 125 psig service and shall be the product of the same manufacturer. Grooved fitting and mechanical coupling housing shall be ductile iron conforming to ASTM A536. Gaskets for use in grooved joints shall be molded synthetic polymer of pressure responsive design and shall conform to ASTM D2000 for circulating medium up to 230 degrees F.

Grooved joints shall conform to AWWA C606. Coupling nuts and bolts for use in grooved joints shall be steel and shall conform to ASTM A183.

2.2.2 Red Brass Pipe and Associated Fittings

Pipe shall conform to requirements of ASTM B43, regular. Fittings shall be Class 250, cast bronze threaded conforming to the requirements of

ASME B16.15.

2.2.3 Galvanized Steel Pipe and Associated Fittings

Pipe shall conform to requirements of ASTM A53/A53M, Schedule 40.

Fittings shall be Class 150 conforming to requirements of ASME B16.3.

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

2.2.4.1 PVC Pipe

Pipe shall conform to the requirements of ASTM D1785, PVC 1120 Schedule

80; or ASTM D2241, PVC 1120 SDR 21, Class 200.

2.2.4.2 PVC Fittings

Solvent welded socket type fittings shall conform to requirements of

ASTM D2466, Schedule 40. Threaded type fittings shall conform to requirements of ASTM D2464, Schedule 80.

2.2.4.3 Solvent Cement

Solvent cement shall conform to the requirements of ASTM D2564.

2.2.5 Polyethylene (PE) Plastic Piping

Pipe shall conform to AWWA C901, outside diameter base with dimension ratio (DR) of 9.3 to provide 1034 kPa 150 psi minimum pressure rating.

Fittings shall conform to ASTM D3261, DR of 9.3.

2.2.6 Dielectric Fittings

Dielectric fittings shall conform to ASTM F441/F441M, Schedule 80, CPVC threaded pipe nipples, 100 mm 4 inch minimum length.

2.2.7 Emitter Hose and Distribution Tubing

SECTION 32 84 23 Page 7

Emitter hose and distribution tubing shall conform to ASTM D2287, maximum inside diameter of 1/2 inch, minimum wall thickness of 90 mils, 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.

Slip fittings shall be provided.

2.3 SPRINKLER AND EMITTER HEADS.

2.3.1 Pop-Up Spray Heads

2.3.1.1 General Requirements

Pop-up spray heads lay flush with housing, then pop up when water pressure

138 kPa 20 psi is activated in system. The rising member supporting the nozzle shall be identical on full, half, third or quarter pattern sprinklers so that nozzles will be interchangeable. The sprinkler head shall be designed to be adjustable for coverage and flow. The nozzle shall be removable so head does not have to be removed for flushing or cleaning. Nozzle rises a minimum of 100 mm 4 inches above the body. The body shall be constructed with a 13 mm 1/2 inch female thread for installation in a fixed underground pipe system.

2.3.1.2 Shrubbery Sprinkler Heads

Sprinkler heads shall be conical spray with adjustable or non-adjustable coverage and designed for permanent aboveground mounting on riser or pop-ups at a height compatible with ground covers. Provide brass nozzles.

2.3.2 Rotary Pop-Up Sprinklers

Sprinklers shall be capable of covering the area shown in the drawings.

2.3.3 Bubbler Sprinkler Heads

Heads shall be multiple-spray bubbler with adjustable flow and designed for permanent aboveground mounting on risers.

2.3.4 Surface Connected Lawn Sprinkler Heads

Heads shall be an impulse type with or without sled, ring, or wheel base;

multiple T Type; a rotary type with sled, spike or wheel base; or oscillating type with wheel or sled base.

2.3.5 Emitter Heads

Emitter heads shall be self-cleaning, pressure compensating diaphragm with one or six self-piercing barbed outlets; each capable of emitting from 1/4 to 2 gallons/hour flow. Emitter body shall be ultraviolet stabilized, algae, and heat resistant plastic construction.

2.4 VALVES.

2.4.1 Gate Valves, Less than 80 mm 3 Inches

Gate valves shall conform to the requirements of MSS SP-80, Type 1, Class

150, threaded ends.

2.4.2 Gate Valves, 3 Inches and Larger

SECTION 32 84 23 Page 8

Gate valves shall conform to the requirements of AWWA C509 and have encapsulated resilient wedge, parallel seats, non-rising stems, and open by counterclockwise turning. End connections shall be flanged. Interior construction of valves shall be bronze including stem containing a maximum

2 percent aluminum and maximum 16 percent zinc.

2.4.3 Angle Valves, Less Than 2-1/2 Inches

Angle valves shall conform to the requirements of MSS SP-80, Type 3, Class

150 threaded ends.

2.4.4 Angle Valves, 2-1/2 Inches and Larger

Angle valves shall conform to the requirements of MSS SP-85, Type II, Class 250 threaded ends.

2.4.5 Quick Coupling Valves

Quick coupling valves shall have brass parts and shall be 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 shutdown of main. Lids shall be lockable vinyl with spring for positive closure on key removal.

2.4.6 Remote Control Valves, Electrical

Remote control valves shall be solenoid actuated globe valves of 3/4 to 3 inch size, suitable for 24 volts, 60 or 50 cycle, and designed to provide for shut-off in event of power failure. Valve shall be cast bronze or brass or plastic housing suitable for service at 150 psi operating pressure with external flow control adjustment for shut-off capability, external plug at diaphragm chamber to enable manual operation, filter in control chamber to prevent valve body clogging with debris, durable diaphragm, and accessibility to internal parts without removing valve from system.

2.4.7 Drain Valves

2.4.7.1 Manual Valves

Manual valves shall conform to requirements of MSS SP-80, Type 3, Class

150 threaded ends for sizes less than 2-1/2 inches and MSS SP-85, Type

II, Class 250 threaded ends for sizes 2-1/2 inches and larger.

2.4.7.2 Automatic Valves

Automatic valves shall be brass or plastic, spring loaded ball drip type, 150 pounds and threaded ends, designed to close at 6 foot pressure head with positive seal at 3 psi pressure or greater and be open to drain at less than 3 psi pressure.

2.4.8 Pressure Regulating Master Valve

Pressure regulating master valve shall be automatic mechanical self-cleaning, self-purging control system having an adjustable pressure setting operated by a solenoid on alternating current with 0.70 amperes at 24 volts. Valve shall close slowly and be free of chatter in each diaphragm position, have manual flow stem to adjust closing speed and internal flushing, and one or two inlet tappings capable of being

SECTION 32 84 23 Page 9 installed as a straight pattern valve. Body shall be cast bronze or brass with removable brass seat serviceable from top without removing valve body from system. Valve shall operate at 150 psi working pressure and pilot range from 10 to 125 psi.

2.4.9 Backflow Preventers

Reduced pressure principle assemblies, double check valve assemblies, atmospheric (nonpressure) type vacuum breakers, and pressure type vacuum breakers shall be tested, approved, and listed in accordance with

FCCCHR Manual. Backflow preventers with intermediate atmospheric vent shall be in accordance with ASSE 1012. Reduced pressure principle backflow preventers shall be in accordance with ASSE 1013.

2.4.9.1 Pressure Type Vacuum Breaker

Vacuum breaker shall conform to the requirements of ASSE 1020 and shall be brass construction, with one or two check valves, vacuum relief, inlet and discharge shut-offs valves, field test cocks, and vacuum relief opening of greater diameter than unit.

2.4.9.2 Reduced Pressure Type Backflow Preventers

Backflow preventers shall be 150 pound flanged brass mounted gate 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. Piping shall be red brass pipe and fittings. Strainers shall be bronze or brass construction with gasket caps. Units shall have 200-mesh stainless steel screen elements.

2.5 ACCESSORIES AND APPURTENANCES.

2.5.1 Valve Keys for Manually Operated Valves

Valve keys shall be 1/2 inch diameter by 3 feet long, tee handles and keyed to fit valves.

2.5.2 Valve Boxes and Concrete Pads

2.5.2.1 Valve Vaults

Valve boxes shall be cast iron, plastic lockable, or precast concrete for each gate valve, manual control valve and remote control valve.

Vault sizes shall be adjustable for valve used. Cast the word

"IRRIGATION" on the cover. Shaft diameter of vault shall be minimum 5-

1/4 inches. Cast iron vault shall have bituminous coating.

2.5.2.2 Concrete Pads

Concrete pads shall be precast or cast-in-place reinforced concrete construction for reduced pressure type backflow preventers.

2.5.3 Pressure Gauges

Pressure gauges shall conform to requirements of ASME B40.100, single style pressure gauge for water with 4-1/2 inch dial brass or aluminum case, bronze tube, gauge cock, pressure snubber, and siphon. Scale range shall be suitable for irrigation sprinkler systems.

2.5.4 Service Clamps

SECTION 32 84 23 Page 10

Service clamps shall be bronze flat, double strap, with neoprene gasket or

"O"-ring seal.

2.5.5 Water Hammer Arresters

Water hammer arrester shall conform to the requirements of PDI WH 201;

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

2.5.6 Emitter Head Accessories

2.5.6.1 Strainer

Strainer shall be provided at inlet to each drip line. Strainer shall have stainless steel screen having equivalent of 140-mesh filtration capacity and incorporate flush valves within strainer to clean screen without disassembling unit.

2.5.6.2 Pressure Regulator

Pressure regulator shall be provided at each drip system if supply pressure exceeds 50 psi.

2.5.6.3 Riser Adapters

Riser adapters shall be provided with a rigid piping system.

2.5.6.4 Tubing Stakes

Tubing stakes shall be plastic coated steel, or other non-corrosive strong material to secure tubing.

2.5.6.5 Emitter Outlet Check Valve (Bug Cap)

Check valves shall be provided 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.

2.5.6.6 Access Sleeve

Access sleeve shall be provided at buried emitters placed in covered boxes. Lids of access sleeve shall be secured with removable lugs. Drip hose in both vertical and horizontal axis shall be secured.

2.5.6.7 Closure Caps

Closure caps shall be in accordance with manufacturer's recommendations.

2.6 AUTOMATIC CONTROLLERS, ELECTRICAL.

Controller shall conform to the requirements of NEMA ICS 2 with 120 or

220-volt single phase service, operating with indicated stations, and grounded chassis. Enclosure shall conform to NEMA ICS 6 Type 3R, with locking hinged cover, pedestal-mounted or wall-mounted. Controller shall be programmed for various schedules by setting switches and dials equipped with the following features: A switch for each day of week for one, two, or three schedules, allowing each station to be scheduled individually as to days of watering; a minute switch for each station with a positive increment range of 3 to 60 minutes, set time within one percent; a switch

SECTION 32 84 23 Page 11 allowing selected schedules to be repeated after each completion of initial watering schedule and allowing each operation to be scheduled throughout a 24-hour day; a circuit breaker for surge protection; and circuit for a 9-volt rechargeable NiCad battery.

2.7 ELECTRICAL WORK.

Wiring and rigid conduit for electrical power shall be in accordance with

NFPA 70.

2.8 CONCRETE MATERIALS.

Concrete shall have a compressive strength of 3500 psi at 28 days as specified in Section 03 30 00 CAST-IN-PLACE CONCRETE.

2.9 INSULATING JOINTS.

Insulating joints and dielectric fittings shall be in accordance with manufacturer.

PART 3 EXECUTION.

3.1 EXAMINATION.

After becoming familiar with all details of the work verify all dimensions in the field and advise the Contracting Officer of any discrepancy before performing the work.

3.2 INSTALLATION.

Install Sprinkler System after site grading has been completed. Perform excavation, trenching, and backfilling for sprinkler system in accordance with the applicable provisions of Section 31 00 00 EARTHWORK, except as modified herein.

a. Submit detail drawings for valves, sprinkler heads, backflow preventers, automatic controllers, emitter heads, and water hammer arresters. Include on the drawings a complete list of equipment and materials, and manufacturer's descriptive and technical literature, performance charts and curves, catalog cuts, and installation instructions. Also show on the drawings complete wiring and schematic diagrams and any other details required to demonstrate that the system has been coordinated and will function as a unit. Show on the drawings proposed system layout, type and number of heads and emitters, zone valves, drain pockets, backflow devices, controllers, and mounting details of controllers.

b. Submit detailed procedures defining the Contractor's provisions for accident prevention, health protection, and other safety precautions for the work to be done. Submit the material supplier's or equipment manufacturer's statement that the supplied material or equipment meets specified requirements. Each certificate shall be signed by an official authorized to certify in behalf of material supplier or product manufacturer and shall identify quantity and date or dates of shipment or delivery to which the certificates apply.

Include As-built Drawings which provide current factual information showing locations of mains, heads, valves, and controllers including deviations from and amendments to the drawings and changes in the work.

c. Submit 6 copies of operation and 6 copies of maintenance manuals for the equipment furnished. One complete set prior to field testing

SECTION 32 84 23 Page 12 and the remainder upon acceptance. Manuals shall be approved prior to the field training course. Operating manuals shall detail the step-by-step procedures required for system startup, operation, and shutdown.

Operating manuals shall include the manufacturer's name, model number, parts list, and brief description of all equipment and their basic operating features.

d. Maintenance manuals shall list routine maintenance procedures, possible breakdowns and repairs, and troubleshooting guides.

Maintenance manuals shall include piping and equipment layout, simplified wiring and control diagrams of the system as installed, and system programming schedule.

3.2.1 Trenching

Hand excavate trench around roots to pipe grade when roots of 2 inches diameter or greater are encountered. Trench width shall be 4 inches minimum or 1.5 times diameter of pipe, whichever is wider. Backfill shall be hand tamped over excavation. When rock is encountered, trench shall be excavated 4 inches deeper and backfilled with silty sand (SM) or well-graded sand (SW) to pipe grade. Trenches shall be kept free of obstructions and debris that would damage pipe. Subsoil shall not be mixed with topsoil. Existing concrete walks, drives and other obstacles shall be bored at a depth conforming to bottom of adjacent trenches. Pipe sleeves for bored pipe shall be two pipe diameters larger than sprinkler pipe.

3.2.2 Piping System

3.2.2.1 Cover

Underground piping shall be installed to meet the minimum depth of backfill cover specified.

3.2.2.2 Clearances

Minimum horizontal clearances between lines shall be 4 inches for pipe 2 inches and less; 12 inches for 2-1/2 inches and larger. Minimum vertical clearances between lines shall be 1 inch.

3.2.2.3 Minimum Slope

Minimum slope shall be 6 inches per 100 feet in direction of drain valves.

3.2.3 Piping Installation

3.2.3.1 Polyvinyl Chloride (PVC) Pipe

a. Solvent-cemented joints shall conform to the requirements of

ASTM D2855.

b. Threaded joints shall be full cut with a maximum of three threads remaining exposed on pipe and nipples. Threaded joints shall be made tight without recourse to wicks or fillers, other than polytetrafluoroethylene thread tape.

c. Piping shall be joined to conform with requirements of ASTM D2774 or ASTM D2855, and pipe manufacturer's instructions. Pipe shall be installed in a serpentine (snaked) manner to allow for expansion and contraction in trench before backfilling. Pipes shall be installed at

SECTION 32 84 23 Page 13 temperatures over 40 degrees F.

3.2.3.2 Soldered Copper Tubing

Pipe shall be reamed and burrs removed. Contact surfaces of joint shall be cleaned and polished. Flux shall be applied to male and female ends.

End of tube shall be inserted into fittings full depth of socket. After soldering, a solder bead shall show continuously around entire joint circumference. Excess acid flux shall be removed from tubings and fittings.

3.2.3.3 Threaded Brass or Galvanized Steel Pipe

Prior to installation, pipe shall be reamed. Threads shall be cut in conformance with ASME B1.2. Pipe joint compound shall be applied to male end only.

3.2.3.4 Insulating Joints

Insulating and dielectric fittings shall be provided where pipes of dissimilar metal are joined and at connections to water supply mains as shown.

3.2.3.5 Grooved Mechanical Joints

Grooves shall be prepared according to the coupling manufacturer's instructions. Grooved fittings, couplings, and grooving tools shall be products of the same manufacturer. Pipe and groove dimensions shall comply with the tolerances specified by the coupling manufacturer. The diameter of grooves made in the field shall be measured using a "go/no-go" gauge, vernier or dial caliper, narrow-land micrometer, or other method specifically approved by the coupling manufacturer for the intended application. Grove width and dimension of groove from end of pipe shall be measured and recorded for each change in grooving tool setup to verify compliance with the coupling manufacturer's tolerances. Grooved joints shall not be used in concealed locations.

3.2.4 Installation of Valves

3.2.4.1 Manual Valves

Valves shall be installed in a valve box extending from grade to below valve body, with a minimum of 100 mm 4 inches cover measured from finish grade to top of valve stem.

3.2.4.2 Automatic Valves

Valve shall be set plumb in a valve box extending from grade to below valve body, with minimum of 100 mm 4 inch cover measured from grade to top of valve. Automatic valves shall be installed beside sprinkler heads with a valve box.

3.2.4.3 Drain Valves

Entire system shall be manually or automatically drainable. Low points of system shall be equipped with drain valve draining into an excavation containing 1 cubic foot gravel. Gravel shall be covered with building paper then backfilled with excavated material and 6 inches of topsoil.

3.2.5 Sprinklers and Quick Coupling Valves

SECTION 32 84 23 Page 14

Sprinklers and valves shall be installed plumb and level with terrain.

3.2.6 Installation of Drip Irrigation System

3.2.6.1 Emitter Hose

Emitter laterals shall be buried 6 inches deep. Connections shall be solvent welded in accordance with manufacturer's recommendation to standard weight Schedule 40 PVC fittings and bushings. Hose shall be installed in a serpentine manner. When cutting hose, shearing tool such as a pipe cutter, knife, or shears shall be used. Manufacturer's recommended tool and procedures when punching hose for emitters shall be followed.

3.2.6.2 Emitter Heads

Emitters shall be installed in a plastic emitter box. Emitter on a rigid

PVC nipple shall be connected to PVC drip lateral with a tee or elbow.

Tubing shall be attached to barbed fitting and daylight distribution tubing at root ball secured with stake, with bug cap at end of secured distribution tubing. After installing emitters and before operating system, end of drip lateral shall be opened and flushed clean. The number of emitters on a line shall not exceed manufacturer's recommendations for that hose or distribution tubing size and length.

3.2.6.3 Tubing Stakes

Main irrigation line shall be secured with stakes where line is aboveground. Stakes shall be spaced to ensure that hose does not shift location in presence of foot traffic, operations, gravity on slope installations, or environmental effects. Discharge of the emitter distribution tubing shall be staked to ensure that discharge point of emitter will be maintained at specified position in relation to plant material to be irrigated.

3.2.7 Backflow Preventers

Backflow preventer shall be installed in new connection to existing water distribution system, between connection and control valves. Backflow preventer shall be installed with concrete pads.

3.2.7.1 Pressure Type Vacuum Breaker

Pressure type vacuum breaker shall be installed 12 inches above highest head.

3.2.7.2 Reduced Pressure Type

Pipe lines shall be flushed prior to installing reduced pressure device;

device shall be protected by a strainer located upstream. Device shall not be installed in pits or where any part of device could become submerged in standing water.

3.2.8 Control Wire and Conduit

3.2.8.1 Wires

Low voltage wires may be buried beside pipe in same trench. Rigid conduit shall be provided where wires run under paving. Wires shall be number tagged at key locations along main to facilitate service. One control

SECTION 32 84 23 Page 15 circuit shall be provided for each zone and a circuit to control sprinkler system.

3.2.8.2 Loops

A 12 inch loop of wire shall be provided at each valve where controls are connected.

3.2.8.3 Expansion and Contraction

Multiple tubes or wires shall be bundled and taped together at 10 or 20 foot intervals with 300 mm 12 inch loop for expansion and contraction.

3.2.8.4 Splices

Electrical splices shall be waterproof.

3.2.9 Automatic Controller

Exact field location of controllers shall be determined before installation. Coordinate the electrical service to these locations.

Install in accordance with manufacturer's recommendations and NFPA 70.

3.2.10 Thrust Blocks

Concrete shall be placed so that sides subject to thrust or load are against undisturbed earth, and valves and fittings are serviceable after concrete has set.

3.2.11 Backfill

3.2.11.1 Minimum Cover

Depth of cover shall be 24 inches for 1-1/4 inch pipe or smaller;

24 inches for 1-1/2 to 2 inch pipe; 24 inches for 2-1/2 inch pipe or larger;

36 inches for pipes under traffic loads, farm operations, and freezing temperatures; and 18 inches for low-voltage wires. Remainder of trench or pipe cover shall be filled to within 3 inches of top with excavated soil, and compact soil with plate hand-held compactors to same density as undisturbed adjacent soil.

3.2.11.2 Restoration

Top 3 inches shall be filled with topsoil and compacted with same density as surrounding soil.

3.2.12 Adjustment

After grading, seeding, and rolling of planted areas, sprinkler heads shall be adjusted flush with finished grade. Adjustments shall be made 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.

3.2.13 Disinfection

Sprinkler system fed from a potable water system shall be disinfected upstream of backflow preventer.

3.2.14 Cleaning of Piping

SECTION 32 84 23 Page 16

Prior to the hydrostatic and operation tests, the interior of the pipe shall be flushed with clean water until pipe is free of all foreign materials. Flushing and cleaning out of system pipe, valves, and components shall not be considered completed until witnessed and accepted by Contracting Officer.

3.3 FRAMED INSTRUCTIONS.

Post framed instructions, containing wiring and control diagrams under glass or in laminated plastic, where directed. Condensed operating instructions, prepared in typed form, shall be framed as specified above and posted beside the diagrams. Post the framed instructions before acceptance testing of the system. Submit labels, signs, and templates of operating instructions that are required to be mounted or installed on or near the product for normal, safe operation. After as-built drawings are approved by Contracting Officer, prepare controller charts and programming schedule. One chart for each controller shall be supplied. Chart shall be a reduced drawing of actual as-built system that will fit the maximum dimensions inside controller housing. Black line print for chart and a different pastel or transparent color shall indicate each station area of coverage. After chart is completed and approved for final acceptance, chart shall be sealed between two 20 mil pieces of clear plastic.

3.4 FIELD TRAINING.

Provide a field training course for designated operating and maintenance staff members for a total period of 2 hours of normal working time and starting after the system is functionally complete but prior to final acceptance tests. Submit information describing training to be provided, training aids to be used, samples of training materials to be provided, and schedules and notification of training. Field training shall cover all of the items contained in the operating and maintenance manuals.

3.5 FIELD TESTS.

Provide all instruments, equipment, facilities, and labor required to conduct the tests. Submit performance test reports, in booklet form, showing all field tests performed to adjust each component; and all field tests performed to prove compliance with the specified performance criteria, upon completion and testing of the installed system. Indicate in each test report the final position of control valves.

3.5.1 Hydrostatic Pressure Test

Piping shall be tested hydrostatically before backfilling and proved tight at a hydrostatic pressure of 150 psi without pumping for a period of one hour with an allowable pressure drop of 5 psi. If hydrostatic pressure cannot be held for a minimum of 4 hours, make adjustments or replacements and repeat the tests until satisfactory results are achieved and accepted by the Contracting Officer.

3.5.2 Leakage Tests

Leakage tests for service main shall be in accordance with manufacturer.

3.5.3 Operation Test

At conclusion of pressure test, sprinkler heads or emitter heads, quick

SECTION 32 84 23 Page 17 coupling assemblies, and hose valves shall be installed and entire system tested for operation under normal operating pressure. Operation test consists of the system operating through at least one complete programmed cycle for all areas to be sprinkled.

3.6 CLEANUP.

Upon completion of installation of system, all debris and surplus materials resulting from the work shall be removed.

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