328423-RIB-Underground_Sprinklers-05-03-2024.pdf

Gulf Boulevard Landscape Phase 3 Navarre, Florida

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Underground Sprinklers WAS Design, Inc.

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SECTION 328423

UNDERGROUND SPRINKLERS

PART 1 GENERAL

1.01 SECTION INCLUDES

A. Pipe and fittings, valves, sprinkler heads, drip irrigation specialties, emitters, and accessories.

B. Control system.

1.02 RELATED REQUIREMENTS

A. Section 260519 - Low-Voltage Electrical Power Conductors and Cables.

B. Section 312316 - Excavation: Excavating for irrigation piping.

C. Section 312323 - Fill: Backfilling for irrigation piping.

1.03 REFERENCE STANDARDS

A. ASTM D2241 - Standard Specification for Poly(Vinyl Chloride) (PVC) Pressure-Rated Pipe (SDR Series); 2020.

B. ASTM D2564 - Standard Specification for Solvent Cements for Poly(Vinyl Chloride) (PVC) Plastic Piping Systems; 2020.

C. NEMA 250 - Enclosures for Electrical Equipment (1000 Volts Maximum); 2020.

1.04 ADMINISTRATIVE REQUIREMENTS

A. Coordination: Coordinate the work with site backfilling, landscape grading and delivery of plant life.

B. Preinstallation Meeting: Convene one week prior to commencing work of this Section.

1.05 SUBMITTALS

A. See Section 013000 - Administrative Requirements, for submittal procedures.

B. Product Data: Provide component and control system and wiring diagrams. Include specific model numbers to be provided.

C. Operation and Maintenance Data:

1. Provide instructions for operation and maintenance of system and controls, seasonal activation and shutdown, and manufacturer's parts catalog.

2. Provide schedule indicating length of time each valve is required to be open to provide a determined amount of water.

D. Record Documents: Record actual locations of all concealed components piping system.

1.06 QUALITY ASSURANCE

A. A. Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA 70, by a qualified testing agency, and marked for intended location and application.

B. Installer Qualifications: Company specializing in performing the work of this section with minimum 5 years of experience .

PART 2 PRODUCTS

2.01 REGULATORY REQUIREMENTS

A. Comply with applicable code for piping and component requirements.

2.02 IRRIGATION SYSTEM

A. Electric solenoid controlled underground irrigation system, with low point self drain.

1. Source Power: 120 volt, minimum 15 A., single phase.

B. Manufacturers:

1. Rain Bird Sales, Inc: www.rainbird.com/#sl per Owner maintenance requirements.

2. Substitutions: See Section 016000 - Product Requirements.

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2.03 PIPE MATERIALS

A. PVC Pipe 2 inch & smaller: ASTM D2241; 200 psi pressure rated upstream from controls, 200 psi downstream; solvent welded sockets.

B. PVC Pipe 2.5 inch & larger: ASTM D2241; 200 psi pressure rated upstream from controls, [200] psi downstream; rubber gasketed joints.

C. Fittings: Type and style of connection to match pipe.

D. Pipe Risers at Valves: 160 psi PVC pipe.

E. Solvent Cement: ASTM D2564 for PVC pipe and fittings.

F. Sleeve Material: PVC Class 200 .

2.04 SPRINKLERS

A. Manufacturers:

1. Rainbird .

2. Substitutions: See Section 016000 - Product Requirements.

B. Spray Type Sprinkler Head: Fixed surface head.

C. Quick Coupler: Rainbird. .

2.05 MANUAL VALVES

A. Plastic Ball Valves:

1. Description:

a. Standard: MSS SP-122.

b. Pressure Rating: 150 psig.

c. Body Material: PVC.

d. Type: Union.

e. End Connections: Socket or threaded.

f. Port: Full.

2.06 AUTOMATIC CONTROL VALVES

A. Manufacturers:

1. Rainbird, as Indicated on Drawings.

2. Substitutions: See Section 016000 - Product Requirements .

B. Valve Box and Cover:

1. Plastic Boxes:

a. Description: Box and cover, with open bottom and openings for piping; designed for installing flush with grade.

1) Size: As required for valves and service.

2) Shape: Rectangular.

3) Sidewall Material: PE, ABS, or FRP.

4) Cover Material: PE, ABS, or FRP.

(a) Lettering: " IRRIGATION".

(b) Must be sized to allow for 2" clearance in any direction of operable, movable parts or parts requiring maintenance within the box, such as a solenoid or valve top replacement.

2.07 CONTROLS

A. Controller: As Indicated on Drawings .

B. Controller Housing: NEMA 250 Type 3; weatherproof, watertight, with lockable access door.

C. Valves: Electric Solenoid ; normally closed ; hydraulic tubing , including required fittings and accessories.

D. Wire Conductors: Color coded.

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PART 3 EXECUTION

3.01 EXAMINATION

A. Verify location of existing utilities.

B. Verify that required utilities are available, in proper location, and ready for use.

3.02 PREPARATION

A. Piping layout indicated is diagrammatic only. Route piping to avoid plants, ground cover, and structures.

B. Layout and stake locations of system components.

C. Review layout requirements with other affected work. Coordinate locations of sleeves under paving to accommodate system.

3.03 TRENCHING

A. Trench Size:

1. Minimum Cover Over Installed Main Piping: 24 inches or not less than 18 inches below average local frost depth, whichever is deeper.

2. Minimum Cover Over Installed Circuit Piping: 18 inches.

3. Minimum Cover Over Installed Drain Piping: 18 inches.

4. Minimum Cover Over Installed Sleeve Piping: 24 inches

B. Trench to accommodate grade changes and slope to drains.

C. Maintain trenches free of debris, material, or obstructions that may damage pipe.

D. Install warning tape directly above pressure piping, 12 inches below finished grades, except 6 inches below subgrade under pavement and slabs.

3.04 INSTALLATION

A. Connect to utilities.

B. Set outlets and box covers at finish grade elevations.

C. Provide for thermal movement of components in system.

D. Slope piping for self drainage to drain valves at a minimum uniform slope of 0.5 percent .

E. Use threaded nipples for risers to each outlet.

F. Install piping free of sags and bends.

G. Install groups of pipes parallel to each other, spaced to permit valve servicing.

H. Install fittings for changes in direction and branch connections.

I. Install underground thermoplastic piping according to ASTM D 2774 and ASTM F 690.

J. Install expansion loops in control-valve boxes for plastic piping.

K. Lay piping on solid subbase, uniformly sloped without humps or depressions.

L. Install PVC piping in dry weather when temperature is above 40 deg F. Allow joints to cure at least 24 hours at temperatures above 40 deg F before testing.

M. Install control wiring in accordance with Section 260519 . Provide 10 inch expansion coil at each valve to which controls are connected, and at 100 ft intervals. Bury wiring beside pipe.

N. After piping is installed, but before outlets are installed and backfilling commences, open valves and flush system with full head of water.

3.05 JOINT CONSTRUCTION

A. Ream ends of pipes and tubes and remove burrs. Bevel plain ends of steel pipe.

B. Remove scale, slag, dirt, and debris from inside and outside of pipe and fittings before assembly.

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C. Threaded Joints: Thread pipe with tapered pipe threads according to ASME B1.20.1. Cut threads full and clean using sharp dies. Ream threaded pipe ends to remove burrs and restore full ID. Join pipe fittings and valves as follows:

1. Apply appropriate tape or thread compound to external pipe threads unless dry seal threading is specified.

2. Damaged Threads: Do not use pipe or pipe fittings with threads that are corroded or damaged. Do not use pipe sections that have cracked or open welds.

D. Flanged Joints: Select rubber gasket material, size, type, and thickness for service application.

Install gasket concentrically positioned. Use suitable lubricants on bolt threads.

E. PVC Piping Solvent-Cemented Joints: Clean and dry joining surfaces. Join pipe and fittings according to the following:

1. Comply with ASTM F 402 for safe-handling practice of cleaners, primers, and solvent cements.

2. PVC Pressure Piping: Join schedule number, ASTM D 1785, PVC pipe and PVC socket fittings according to ASTM D 2672. Join other-than-schedule-number PVC pipe and socket fittings according to ASTM D 2855.

3. PVC Nonpressure Piping: Join according to ASTM D 2855.

3.06 VALVE INSTALLATION

A. Drain Valves: Install in underground piping in boxes for automatic control valves.

3.07 SPRINKLER INSTALLATION

A. Install sprinklers after hydrostatic test is completed.

B. Install sprinklers at manufacturer's recommended heights.

C. Locate part-circle sprinklers to maintain a minimum distance of 4 inches from walls and 2 inches from other boundaries unless otherwise indicated.

3.08 DRIP IRRIGATION SPECIALTY INSTALLATION

A. Install freestanding emitters on pipe riser to mounting height indicated.

B. Install drip tubes with direct-attached emitters on ground.

C. Install application pressure regulators and filter units in piping near device being protected, and in control-valve boxes.

D. Install air relief valves and vacuum relief valves in piping, and in control-valve boxes.

3.09 AUTOMATIC IRRIGATION-CONTROL SYSTEM INSTALLATION

A. Equipment Mounting: Install exterior freestanding controllers on precast concrete bases.

1. Place and secure anchorage devices. Use setting drawings, templates, diagrams, instructions, and directions furnished with items to be embedded.

2. Install anchor bolts to elevations required for proper attachment to supported equipment.

B. Install control cable in same trench as irrigation piping and at least 2 inches below or beside piping. Provide conductors of size not smaller than recommended by controller manufacturer.

Install cable in separate sleeve under paved areas.

3.10 IDENTIFICATION

A. Identify system components. Comply with requirements for identification specified in Section 220553 "Identification for Plumbing Piping and Equipment."

B. Equipment Nameplates and Signs: Install engraved plastic-laminate equipment nameplates and signs on each automatic controller.

1. Text: In addition to identifying unit, distinguish between multiple units, inform operator of operational requirements, indicate safety and emergency precautions, and warn of hazards and improper operations.

C. Valve Tags: Valves should be labeled with printed plastic tags.

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D. Warning Tapes: Arrange for installation of continuous, underground, detectable warning tapes over underground piping during backfilling of trenches.

3.11 FIELD QUALITY CONTROL

A. Perform test and inspections.

B. Prior to backfilling, test system for leakage at main piping to maintain 100 psi pressure for one hour.

C. Test and inspections:

1. System is acceptable if no leakage or loss of pressure occurs during test period.

2. Sprinkler coverage Test: After installation, the system will be observed to meet the following criteria. Adjustments to system shall be made until criteria are met to satisfy either Landscape Architect or Owner's Representative.

a. All sprinklers must be adjusted to minimize overspray onto buildings and paved areas.

b. All sprinkler controls must be adjusted to minimize runoff of irrigated water.

c. All sprinklers must operate at their design radius of throw. Nozzle sizes and types called for in the system design must have been used.

d. Spray patterns must overlap as designed.

e. Sprinklers must be connected, as designed, to the appropriate zone.

3. Operational Test: After electrical circuitry has been energized, operate controllers and automatic control valves to confirm proper system operation.

4. Test and adjust controls and safeties. Replace damaged and malfunctioning controls and equipment.

D. Any irrigation product will be considered defective if it does not pass tests and inspections.

E. Prepare test and inspection reports.

3.12 SYSTEM STARTUP

A. Perform startup service.

1. Prepare and start system in accordance with manufacturer's instructions.

2. Verify that controllers are installed and connected according to the Contract Documents.

3. Verify that electrical wiring installation complies with manufacturer's submittal.

3.13 ADJUSTING

A. Adjust control system to achieve time cycles required.

B. Adjust head types for full water coverage as directed.

C. Adjust settings of controllers.

D. Adjust automatic control valves to provide flow rate at rated operating pressure required for each sprinkler circuit.

E. Adjust sprinklers and devices, except those intended to be mounted aboveground, so they will be flush with, or not more than 1/2 inch above, finish grade.

3.14 CLEANING

A. Flush dirt and debris from piping before installing sprinklers and other devices.

3.15 PIPING SCHEDULE

A. Install components having pressure rating equal to or greater than system operating pressure.

B. Piping in control-valve boxes and aboveground may be joined with flanges or unions instead of joints indicated.

C. Underground irrigation main piping, NPS 2 and smaller , shall be the following:

1. Class 200 SDR 21, PVC, pressure-rated pipe; Schedule 80, PVC socket fittings; and solvent-cemented joints.

D. Underground irrigation main piping, NPS 2.5 and larger, shall be the following:

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1. NPS 2.5 and larger Class 200 SDR 21, PVC, push-on-joint pipe; push-on-joint fittings and gaskets; and gasketed joints.

E. Circuit piping, NPS 2 and smaller, shall be the following:

1. Class 200 SDR 21, PVC pipe and socket fittings; and solvent-cemented joints.

F. Underground Branches and Offsets at Sprinklers and Devices: Schedule 80, PVC pipe;

threaded PVC fittings; and threaded joints.

G. Risers to Aboveground Sprinklers and Specialties: Schedule 80, PVC pipe and socket fittings;

and solvent-cemented joints.

3.16 CLOSEOUT ACTIVITIES

A. Instruct Owner's personnel in operation and maintenance of system, including adjusting of sprinkler heads. Use operation and maintenance data as basis for demonstration.

END OF SECTION