7103-32 8423 BSD-Underground Sprinklers-Addendum 317190 / American Legion Senior
Center
32 8423 - 1 UNDERGROUND SPRINKLERS
SECTION 32 8423
UNDERGROUND SPRINKLERS
PART 1 GENERAL
1.01 SECTION INCLUDES
A.Pipe and fittings, valves, sprinkler heads, emitters, bubblers, and accessories.
B.Control system.
1.02 RELATED REQUIREMENTS
A.Section 31 2316 - Excavation: Excavating for irrigation piping.
B.Section 31 2323 - Fill: Backfilling for irrigation piping.
1.03 REFERENCE STANDARDS
A.ASTM D2241 - Standard Specification for Poly (Vinyl Chloride) (PVC) Pressure-Rated Pipe
(SDR Series); 2015.
B.NEMA 250 - Enclosures for Electrical Equipment (1000 Volts Maximum); 2014.
1.04 ADMINISTRATIVE REQUIREMENTS
A.Preinstallation Meeting: Convene one week prior to commencing work of this Section.
1.05 SUBMITTALS
A.See Section 01 3000 - Administrative Requirements, for submittal procedures.
B.Product Data: Provide component and control system and wiring diagrams.
C.Shop Drawings: Indicate piping layout to water source, location of sleeves under pavement,
location and coverage of sprinkler heads, components, plant and landscaping features, site
structures, schedule of fittings to be used.
D.Certificate: Certify that products of this section approved by City of Denton Parks Department.
E.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.
F.Maintenance Materials: Provide the following for Owner's use in maintenance of project.
1.See Section 01 6000 - Product Requirements, for additional provisions.
2.Extra Sprinkler Heads: Two of each type and size.
3.Extra Valve Keys for Manual Valves: One.
PART 2 PRODUCTS
2.01 IRRIGATION SYSTEM
A.Electric solenoid controlled underground irrigation system, with pressure blow-out drain.
B.Manufacturers:
1.Rain Bird Sales, Inc; ____: www.rainbird.com/#sle.
2.Toro Company; ____: www.toro.com/#sle.
3.Weathermatic; ____: www.weathermatic.com/#sle.
4.Substitutions: See Section 01 6000 - Product Requirements.
2.02 PIPE MATERIALS
A.PVC Pipe: ASTM D2241; 200 psi pressure rated upstream from controls, 160 psi downstream;
solvent welded sockets.
2.03 OUTLETS
A.Rotary Type Sprinkler Head: Fixed type with screens; fully adjustable for flow and pressure;
size as indicated; with letter or symbol designating degree of arc and arrow indicating center of
spray pattern.
17190 / American Legion Senior
Center
32 8423 - 2 UNDERGROUND SPRINKLERS
2.04 VALVES
A.Gate Valves: Bronze construction non-rising stem.
B.Backflow Preventers: Iron body construction, double check valve type.
C.Valve Box and Cover: ________________.
2.05 CONTROLS
A.Controller: Automatic controller, microprocessor solid state control with visible readout display,
temporary override feature to bypass cycle for inclement weather, timer for a 4 station system,
programmable for 7 days in quarter hour increments, with automatic start and shutdown.
B.Controller Housing: NEMA 250 Type 3; weatherproof, watertight, with lockable access door.
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 INSTALLATION
A.Install pipe, valves, controls, and outlets in accordance with manufacturer's instructions.
B.Connect to utilities.
C.Set outlets and box covers at finish grade elevations.
D.Provide for thermal movement of components in system.
E.Use threaded nipples for risers to each outlet.
F.After piping is installed, but before outlets are installed and backfilling commences, open valves
and flush system with full head of water.
3.03 BACKFILLING
A.Provide 3 inch sand cover over piping.
B.Backfill trench and compact to specified subgrade elevation. Protect piping from displacement.
3.04 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.
3.05 MAINTENANCE
A.See Section 01 7000 - Execution and Closeout Requirements, for additional requirements
relating to maintenance service.
B.Provide one complete spring start-up and a fall shutdown by installer, at no extra cost to Owner.
END OF SECTION 32 8423