SECTION 32 8426
RECLAIMED WATER IRRIGATION
EDIT NOTES:
1. THIS SPECIFICATION SECTION INCLUDES SOME DESIGN
GUIDELINES, SO EXTENSIVE EDITING IS REQUIRED FOR, BUT NOT
LIMITED TO, BOLD ITEMS TO PROVIDE A SPECIFICATION WHICH
IS COMPLIMENTARY TO THE DRAWINGS AND DESIGN INTENT.
2. USE DISTRICT STANDARD DETAILS, AS THEY PERTAIN TO THE
PROJECT.
3. LAUSD’s RECYCLED WATER USE PROJECT PLAN SHALL BE USED
TO COORDINATE RECLAIMED IRRIGATION PROJECTS.
PART 1 - GENERAL
1.01
SUMMARY
A.
Section Includes:
1.
B.
1.02
Reclaimed water irrigation system.
Related Requirements:
1.
Division 01 - General Requirements.
2.
Section 01 4524 - Environmental Import/Export Materials Testing.
3.
Division 22 - Plumbing.
4.
Division 26 - Electrical.
5.
Section 31 2313 - Excavation and Fill.
6.
Section 31 2323 - Excavation and Fill (Utilities).
7.
Section 32 8416 - Irrigation Controls.
8.
Section 32 8426 - Potable Water Irrigation.
9.
Section 32 9000 - Planting.
10.
LAUSD’s Recycled Water Use Project Plan.
SUBMITTALS
A.
Materials List: Provide manufacturer’s name and description of items to be
furnished.
PROJECT NAME
SCHOOL NAME
10/01/2011
RECLAIMED WATER IRRIGATION
32 8426-1
B.
Product Data: Provide catalog cuts, technical data, and manufacturer’s
specifications.
C.
Shop Drawings: Provide Shop Drawings indicating proposed system
layout, locations of controllers, valves, backflow devices, flow sensors,
master valves, quick couplers, heads and point of connections. Include
details for sleeves, yard boxes, backflow devices, and controller
installations.
D.
Provide proof of purchase for energy saving devices to the Owner. Owner
will receive rebates as part of energy savings program.
E.
RECORD DOCUMENTS
1.
Before Contract Completion, provide project record documents as
follows:
a.
2.
Closeout Submittals-As Built:
a.
Submit three copies of as built including complete list of
materials, manufacturer’s name, and product installation
literatures.
b.
Record drawings: Submit dimensioned drawings and
details, before Contract Completion.
c.
Record Drawings shall contain the following:
d.
PROJECT NAME
SCHOOL NAME
On a laminated chart indicate the location of each
numbered sprinkler controlled valves and quick coupling
valves with legible dimensions from two permanent points
of reference such as building corners or sidewalks.
1)
As-Built shall be computer generated (AutoCad).
2)
Print shall show the locations of the numbered
remote control valves, manual control valves,
locations and size of supply and lateral lines,
location and type of sprinkler heads, quick coupling
valves, gate valves, point of connections,
controllers, and other related equipment.
3).
Dimensions shall be legible from two permanent
points of reference such as buildings and sidewalks.
4).
Drawings shall be 24-inch by 36-inch minimum
size.
Letter of notification to the County Public Health Dept. that
reclaimed system will be activated.
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RECLAIMED WATER IRRIGATION
32 8426-2
3.
1.03
Operation and Maintenance Manuals:
a.
Provide complete operating and maintenance instruction
manuals for equipment.
b.
Provide in writing as part of the Water Management
Program the controller settings for water under Best
Management Practices No. 5 Handbook for all seasons.
This service shall be performed by a certified water auditor
and paid by the Contractor. This report shall identify
designed controller setting for water discharge and actual
installed discharged tested. The audit report shall also
include the status of items indicated in paragraph 1.07.C
based on final inspection and testing.
REFERENCES
A.
B.
American Society for Testing and Materials International (ASTM):
1.
ASTM A53 – Standard Specification for Pipe, Steel, Black and
Hot-Dipped, Zinc-Coated, Welded and Seamless.
2.
ASTM D1784 - Standard Specification for Rigid Poly(Vinyl
Chloride) (PVC) Compounds and Chlorinated Poly(Vinyl
Chloride) (CPVC) Compounds.
3.
ASTM D2466 - Standard Specification for Poly(Vinyl Chloride)
(PVC) Plastic Pipe Fittings, Schedule 40.
4.
ASTM D2467 - Standard Specification for Poly(Vinyl Chloride)
(PVC) Plastic Pipe Fittings, Schedule 80.
American Society of Mechanical Engineers International (ASME):
1.
1.04
B36.10M - Welded and Seamless Wrought Steel Pipe.
QUALITY ASSURANCE
A.
Regulatory Requirements:
1.
B.
Comply with local, municipal and state laws, rules, and regulations
governing or relating to this Work. Wiring shall conform to
National Electrical Code.
Best Management Practices: Conform to “Handbook Five: A Guide for
Implementing Large Scale Irrigation Projects” as required by The
California Water Conservation in Landscaping Act (Assembly Bill 325).
PROJECT NAME
SCHOOL NAME
10/01/2011
RECLAIMED WATER IRRIGATION
32 8426-3
1.
AB 325 California Calculation of Estimated Applied Water Use
(EWU).
2.
AB 325 California Calculation of Maximum Applied Water
Allowance (MAWA).
C.
Conform to California Code of Regulations, Title 23, Division 2, Chapter
2.7, Model Water Efficient Landscape Ordinance.
D.
Manufacturers Instructions: The manufacturer’s instructions and detailed
drawings shall be followed where the manufacturers of products and/or
materials furnish installation details not indicated in the Drawings and
Specifications.
E.
Qualifications: Work shall be performed by skilled workers with a
minimum of five years experience in work of similar scope and
complexity.
F.
Designs and materials used shall conform to the Efficient Landscape
Ordinance, AB 1881 water efficiency use requirements.
G.
LAUSD’s Recycled Water Use Project Plan shall be used to coordinate
reclaimed irrigation projects.
1.05
PRODUCT HANDLING
A.
Do not damage materials during handling, loading, unloading, and storage
of pipe and fittings. Store materials under cover, protect from direct
sunlight. Transport materials in a manner to avoid undue stress on piping
and other materials.
B.
Do not install damaged materials or products into the Work.
1.06
PROJECT CONDITIONS
A.
1.07
Before excavation, contact the "Underground Service Alert of Southern
California" (USASC) for information on buried utilities and pipelines.
TESTING AND INSPECTION
A.
Notify the Project Inspector 24 hours in advance of the pressure side
piping inspection.
1.
PROJECT NAME
SCHOOL NAME
Pressure Side Piping: After welded joints have cured for at least 24
hours, lines flushed and outlets are capped, the system shall be
tested under normal street water pressure for a minimum of 4
hours. Joints shall remain exposed for inspection during the
pressure test. Center loading of piping with small loads of sand
backfill to prevent arching or slipping under pressure is permitted.
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32 8426-4
2.
B.
C.
Correct defective Work and repeat tests until the entire system is
tested watertight.
Submit a request for a final inspection 48 hours in advance. Perform a
coverage test to determine if the coverage of water to turf and planting
areas is complete and adequate meeting the Efficient Landscape Ordinance,
AB 1881 requirements.
Final Inspection: The following items shall be considered part of the final
inspection:
1.08
1.
Specified products and materials.
2.
Irrigation coverage test, providing 100 percent head to head
coverage.
3.
Soils compacted in trenches and around sprinkler heads, level with
existing grades.
4.
Controller and cabinet installation.
5.
Sprinkler control valves and boxes.
6.
Pressure regulators, pumps.
7.
Automatic sensors.
8.
Final site review shall include operating each system in its entirety
in the presence of the Landscape Architect or Project Inspector.
9.
Provide any required adjustments and correct defective Work as
required.
10.
A water audit review showing compliance with the Efficient
Landscape Ordinance, AB 1881.
11.
11.
Irrigation Controller shall water only on days when allowed
by the applicable city that governs watering days. Watering
windows shall be used to water only during non-school hours.
12.
Proper signage stating that a reclaimed water irrigation
system is in place and to not drink the water signs are posted as
outlined in LAUSD’s Recycled Water Use Project Plan Manual
and required by code.
TURN OVER MATERIALS
A.
Extra Materials, Tools and Accessories:
PROJECT NAME
SCHOOL NAME
10/01/2011
RECLAIMED WATER IRRIGATION
32 8426-5
B.
1.09
1.
Spare Sprinkler Heads: Furnish twelve spare sprinkler heads, with
inserts for each type, size and series installed.
2.
Keys and Wrenches:
a.
Keys: Furnish two tagged pin tumbler type keys.
b.
Wrenches: Furnish two sets for each type of sprinkler head
or nozzle.
c.
Coupler: Furnish a minimum of one quick coupler key
(quill) and an additional key for every three quick-coupler
valves installed.
Training:
1.
Before starting a reclaimed irrigation project educate appropriate
school personal about the relative safety of reclaimed water and
explain the benefits of sustainability.
2.
Before substantial completion provide at least 4 hours of training,
by an authorized representative of the controller manufacturer, for
each type of irrigation controller installed.
3.
Instruct designated Owner personnel on operation and
programming of the irrigation controller and hand held controller,
demonstrating all program features.
4.
Review “As-Built” plans with Owner’s personnel and explain the
following features: master valve, flow sensor, rain sensors, pump,
backflow devices and locations of critical valves.
5.
Provide an attendance sheet to the Owner listing all personnel
trained.
WARRANTY
A.
Provide a five year manufacturer’s warranty for controller units.
B.
Provide a one year warranty for materials, fabrication, and installation,
including restoration of planted or paved areas due to settlement of
trenches.
PART 2 - PRODUCTS
2.01
IRRIGATION SYSTEM
A.
Systems shall be automatic with electrically operated control valves.
PROJECT NAME
SCHOOL NAME
10/01/2011
RECLAIMED WATER IRRIGATION
32 8426-6
B.
Provide 100 percent head to head triangulated coverage or other required
100 percent configuration.
C.
Point of connection (POC) for irrigation systems:
1.
Provide a single POC on a designated irrigation meter, with flow
monitoring, unless otherwise indicated on the Drawings.
D.
Football Fields: Install remote valves grouped in above grade caged areas
when not restricted by Project site limitations.
E.
Athletic Fields: Install remote valves grouped along the perimeter of the
field.
F.
No PVC piping of any kind will be permitted for above grade pressure
lines.
G.
Drip irrigation is not permitted except as required the Efficient Landscape
Ordinance, AB 1881.
H.
Install isolation valves in order to avoid a total system shutdown for
maintenance and repairs. Include valves to isolate loop system and major
branch lines.
I.
Irrigation System shall incorporate the following requirements:
2.02
1.
The flow velocity shall not exceed five feet per second for
pressure/lateral lines based on industry standard friction pressure
loss values.
2.
Pressure line pipe size shall be sufficient to support a minimum of
two control valves operating at the same time, one valve opening
while another is closing.
3.
Gallons per minute demand and sprinkler head coverage shall
follow the manufacturer’s requirements.
4.
Remote valves shall be sized no smaller than the piping it serves
unless piping is increased in size to reduce friction loss. Remote
valves shall then be sized no less than one pipe size smaller than
the piping it serves.
5.
Minimum pipe size shall be ¾ inch.
MATERIALS
A.
Provide only new materials, of brands and types noted on Drawings and in
the Specifications.
PROJECT NAME
SCHOOL NAME
10/01/2011
RECLAIMED WATER IRRIGATION
32 8426-7
B.
Plastic Purple Pipe and Fittings:
1.
Pipe shall be extruded from compounds meeting (PVC1120) the
requirements of Cell Classification 12454, as defined in ASTM D
1784, Standard Specification for Rigid Poly (Vinyl Chloride)
(PVC) Compounds and Chlorinated Polyvinyl Chloride) (CPVC)
Compounds.
2.
Pipe shall be colored Purple
3.
Pipe shall be marked with two print lines on opposite sides of the
pipe. Both sides shall read “CAUTION RECLAIMED WATER –
DO NOT DRINK” in intervals not to exceed 5 feet. Pipe shall also
be marked with manufacturer’s name, nominal pipe size, Schedule
or Class. The UL, FM and NSF designations do not apply and are
not printed on the reclaimed water pipes.
4.
Plastic fittings: Schedule 40 molded from PVC Type I Compound,
conforming to the requirements of specification ASTM D2466.
5.
C.
a.
Plastic Nipples: PVC schedule 80 conforming to ASTM
D2467.
b.
Male Threaded Nipples: Schedule 80 only.
PVC primer and solvent for chemical weld of pipe and fittings
shall be as recommended by pipe manufacturer. Containers for
solvent and primer shall be clearly marked with manufacturer's
data. Solvent and primer shall not be more than one year old.
Blue or red hot glue is not permitted.
a.
IPS Weld On P-70 primer.
b.
IPS Weld On 2711 (gray) cement.
Pipe and Fittings:
1.
2.
PROJECT NAME
SCHOOL NAME
Steel Pipe and Steel Fittings: (where occurs at existing schools
only): Pipe and fittings shall be ASA Schedule 40 galvanized mild
steel screwed pipe and beaded galvanized malleable iron screwed
fittings, including couplings. Thread on pipe and fittings shall be
taper type, complying with ANSI Specification B125.1, B125.2
and ASTM A53. Above grade fittings shall comply with ASME
B36.10M and ASTM. A53.
a.
Unions 2-inch and smaller shall be ground joint pattern.
b.
Unions larger than 2-inch shall be flanged unions.
Connection between any female threaded fitting and plastic pipe
shall be bridged with a Schedule 80 PVC nipple.
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32 8426-8
D.
3.
Brass Pipe:
threaded.
Seamless, 85 percent red brass, iron pipe sized,
4.
Brass Fittings: Brass fittings shall be 250250 psi rated, threaded FS
WW-P-460.
5.
Copper pipe, fittings:
a.
Pipe: Type L rigid.
b.
Fittings: Wrought copper, solder joint type.
Valves: (PVC Valves are not permitted):
1.
Gate valves on pipe 2 ½-inch and larger shall be AWWA
Specification, Class "D" standard flanged, or a combination of
outlets as required, iron body, brass trimmed, non-rising stem.
Gate valves 2-inch or smaller shall be bronze, non-rising stem,
threaded:
a.
2.
Gate valves 2-inch or smaller shall be bronze, non-rising stem,
threaded:
a.
3.
Watts 406-NRS-RW, Milwaukee, Hammond, or equal.
Nibco T113, Milwaukee 105, or Hammond 1B 645.
Quick coupler valves shall be all brass, 1 inch, with purple lock
top or purple rubber vinyl cap:
a.
Rainbird 44LRC-NP, Hunter HQ-44LRC-R, or equal.
b.
Quills shall be the same manufacturer as quick coupler
valve, cast bronze, machine shank, stainless steel or bronze
lugs.
4.
Coupler keys (quills) shall be from the same manufacturer as quick
coupler valve; cast bronze with stainless steel or bronze lugs.
5.
Pressure Relief Valves shall be set at a 150 psi. Bronze body with
internal brass parts, stainless steel springs, and 3/4 inch IPS, angle
type, with purge lever:
a.
6.
Check Valves:
a.
PROJECT NAME
SCHOOL NAME
Wilkins P220, Watts 31, or equal.
Swing Type: Check Valves shall be 200 pounds WOG:
bronze screwed with replaceable neoprene disc. Shall have
a straight through pattern with closing member set on angle.
Of size and type indicated on the Drawings. Disc shall
close tight to prevent low head drainage:
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32 8426-9
1)
b.
7.
Pop-up Type: Check valves shall be PVC body, neoprene
disc, stainless steel spring and integral components, straight
through pattern, screwed. Valve to be adjustable in field
from 5 feet to 40 feet head to prevent low head drainage.
Size and type indicated on Drawings.
Electric remote control valves shall be 24 volts normally closed
solenoid actuated valves capable of operating on #14 gage UF
wire; either bronze or brass, globe or angle pattern, and diaphragm
actuated. Said Valves shall be marked in purple, identifying them
as being installed in a Reclaimed Irrigation System.
a.
Superior 950, Rainbird GB-R Series, or Hunter IBVXXXG-FS-R.
8.
Manual sprinkler control valves are not allowed.
9.
Master Control Valves:
10.
E.
Watts Series WCV-2, Nibco T-413, or equal.
a.
Shall be a normally open solenoid actuated valve. Valve
shall have a NPT inlet and outlet, and shall be capable of
working pressures up to 150 psi. Superior 3100, Rainbird,
Hunter, or equal.
b.
Shall meet requirements for Automatic Valves, except for
those indicated on subparagraph 9.a above.
c.
Shall be installed with separate power and common wires.
d.
Flow control handles and bleed screws shall be colored
purple to signify reclaimed water.
No hose bibs shall be installed in reclaimed water irrigation
systems.
Sprinkler Heads:
1.
In lawn areas, provide 4-inch plastic pop-up sprinkler heads with
built in pressure regulator, check valve and nozzles with diameter
of coverage as indicated on drawings.
a.
2.
PROJECT NAME
SCHOOL NAME
Toro 570Z-4P-PRX-COM, Rainbird 1804-SAM-PRS-NP,
Hunter PROS-04-PRS30-CV-R, or equal.
In planters and shrub areas, provide 6-inch plastic pop-up sprinkler
heads with built in check and adjustable or fixed nozzles with
diameter of coverage as indicated on drawings:
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RECLAIMED WATER IRRIGATION
32 8426-10
a.
3.
Tree area sprinklers shall be pressure compensating flood bubblers
surrounded by a perforated sleeve and gravel:
a.
4.
6.
F.
G
Toro-570Z-12P-PRX-COM, Rainbird 1812 SAM-PRS,
Hunter PROS-12-PRS30-CV-R or equal.
Large turf-area sprinkler heads shall be gear driven rotary heads
with removable strainer, and make, type and performance as
indicated on Drawings. Heads shall be permanently marked with
manufacturer's name and shall be equipped with soft rubber covers.
Provide with built-in check valve.
a.
Large Turf: Hunter I40-XX-SS-R, Toro Super 640 Series
SS, Rainbird 800 SS-NP, or equal or Non Potable
equivalent. .
b.
Small Turf: Hunter I20-XX-SS-R, Toro Super 700
Commercial SS, Rainbird 5505 SS NP, or equal.
c.
On Slopes Only: Hunter PGP-XX-CV-R, Toro Super 700
Series, Rainbird 5000 SS NP, or equal.
Install on triple swing assemblies: King Bros. Industries, TSA0500-SS, hunter SJ-505, through SJ 712 or swing joints assembled
with PVC schedule 80 nipples and Marlex 90 degree “L”.
Back Flow Protection Device:
1.
Back Flow Devices are NOT required on Reclaimed Water
Irrigation systems.
2.
Provide shut-off valve in lieu of back flow device.
Tracer Wires:
1.
H.
Rainbird 1400 Series, Hunter PCN Series, or equal.
In groundcover and similar areas, provide 12-inch plastic pop-up
sprinkler heads with built in pressure regulator, check valve and
adjustable or fixed nozzles with diameter of coverage as indicated:
a.
5.
Toro 570Z-6P-PRX-COM, Rainbird 1806-SAM-PRS-NP,
Hunter PROS-06-PRS30-CV-R, or equal.
No. 14, Green, Type TW plastic-coated copper tracer wire shall be
installed with non-metallic irrigation main lines.
Control Wires to Control Valves:
1.
PROJECT NAME
SCHOOL NAME
Control wires to electrically operated solenoid valves shall be
direct burial type UF#14 AWG copper, 3/64 inch thick PVC
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RECLAIMED WATER IRRIGATION
32 8426-11
coating. UL approved for Class 2 wiring for 24 volts, 60 cycle AC
use UL recognized waterproof connectors to connect control wires
to solenoids.
1.
Use UL recognized waterproof connectors to connect
control wires to solenoids.
a.
J.
Spears Drysplice DS400 or Equal.
Valve Boxes:
EDIT NOTE: REMOTE CONTROL VALVE BOXES: AUTOMATIC CONTROL
VALVES SHALL BE ENCLOSED IN GREEN RECTANGULAR PLASTIC
BOXES WITH LOCKING COVERS.
1.
Rectangular valve boxes shall be provided with Purple Lid plastic
12-inch wide, 18-inch long, and 12-inch deep (outside dimensions)
or larger as may be required to provide specified clearances.
a.
2.
NDS#314BCBR with purple, recycled water cover.
Round valve boxes shall be provided with Purple Lid, 7-inch
diameter by 10-inch high with locking cover.
a.
NDS#312BCBR with purple, recycled water cover.
3.
Covers on valve boxes shall be vandal resistant, locking,
and marked "NON POTABLE WATER, DO NOT DRINK". Tops
of boxes shall be set flush with finished turf grade or 2 inch above
grade in shrubbery or groundcover areas. The cover shall be
identified with 3 inch high stenciled letters “RCV (with Station
No.) GV for Gate Valve or QC for Quick Coupler. GV, QC, etc.”
Dura Boxes are not allowed.
EDIT NOTE: EDIT THIS ARTICLE AND SPECIFY PUMP
AND SIZE ACCORDINGLY.
J.
Pumps:
1.
The entire pre-assembly unit shall be U.L. listed and approved.
2.
Energy efficient variable frequency drive (VFD), 3 phase, with
surge. Free soft start.
3.
Pressure regulating valve (PRV) to provide constant downstream
pressure.
4.
Two year limited warranty.
5.
Prefabricated and factory tested booster pump system.
6.
Over temperature protection/pump temperature safety.
PROJECT NAME
SCHOOL NAME
10/01/2011
RECLAIMED WATER IRRIGATION
32 8426-12
K.
7.
Service rated disconnected.
8.
Electrical surge protection – low flow and overflow protection.
9.
Pumps shall be Standalone by Munro Systems, Floboy S Series by
Flowtronex, Irritrol Barret Engineered Pumps, or approved equal.
Signs:
1.
Install signs, in accordance with LAUSD and Title 22
requirements, at entrances stating the use of recycled water for
landscape irrigation.
PART 3 - EXECUTION
3.01
CONNECTIONS TO SUPPLY
A.
Source of water supply shall be as indicated on the Drawings.
B.
Connection to piping shall be provided with proper fittings:
1.
When connecting to point of connection (POC) above grade all
pipes shall be brass or copper with required fittings unless
otherwise indicated.
2.
POC from above to below grade transition shall be brass or copper
pipe to a depth of 18 inches from top of pipe.
3.
No steel pipe or fittings shall be installed.
4.
When connecting plastic pipe to copper, below grade, provide a
schedule 80 PVC nipple.
5. Exposed copper or brass material above grade shall be painted purple
in color and marked as RECLAIMED WATER.
EDIT NOTE: PROVIDE A 1” CONDUIT FROM ONE SUBMASTER ZONE
CONTROLLER TO NEAREST BUILDING (MDF ROOM) FOR FUTURE
CONTROL SYSTEM. THIS CONDUIT SHALL BE LABELED FOR ITS USE.
3.02
RECLAIMED PIPE INSTALLATION
A.
Excavate trenches deep enough to provide earth coverage of 12 inches for
non-pressure lines and 24 inches for pressure lines, from finished grades to
top of pipe. Bottom of trenches shall be free of rocks, clods and other
sharp-edged objects. Below grade piping shall be installed on a firm sand
bed for its entire length.
B.
Plastic pipe and fittings shall be solvent welded. PVC pipe ends shall be
cut ninety degrees and cleaned of all cutting burrs prior to cementing. Use
approved reaming tool. Pipe ends shall be wiped clean with a rag and
lightly wetted with PVC primer. Cement shall be applied with a light coat
PROJECT NAME
SCHOOL NAME
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RECLAIMED WATER IRRIGATION
32 8426-13
on the inside of the fitting and a heavier coat on the outside of the pipe.
Pipe shall be inserted into the fitting and given a quarter turn to seat the
cement. Excess cement shall be wiped from the outside of the pipe. The
pipe will be tested as indicated in article 1.07.
C.
Cure welded joints at least 15 minutes before moving or handling, and at
least 24 hours before applying pressure to system, unless otherwise
recommended by joint solvent manufacturer.
D.
Irrigation piping installed under a driveway or sidewalk shall be sleeved.
The sleeves shall be two pipe sizes larger than the piping.
E.
Piping through cement and asphalt pavement shall be L type copper with ¼
inch of foam wrap or other required material around the pipe to allow for
expansion.
F.
Holes cored through walls shall be two pipe sizes larger to allow for foam
wrap around pipe.
G.
PVC pipes shall not be installed above grade unless reviewed by the
Architect.
H.
Lettering shall be face up on all below grade PVC piping. Pipe serving tree
areas shall be located not more than 30 inch from center of tree area.
I.
Reclaimed irrigation shall be installed below potable water lines.
J.
Reclaimed water meters shall be set no closer than ten feet from a Potable
water meter.
3.03
IRRIGATION HEAD INSTALLATION
A.
Install sprinkler heads with 100 percent triangulated head to head coverage
or other required 100 percent head to head coverage method where
indicated.
B.
To insure proper coverage spray heads and rotary heads shall be installed
on separate control valves.
C.
Install heads and or change heads, nozzles, or orifices as may be required
to provide coverage.
D.
Branch lines, swing joints or sprinkler risers shall not be sized smaller than
the sprinkler heads inlet they serve.
E.
Rotary Heads:
1.
PROJECT NAME
SCHOOL NAME
Prior to installing heads, thoroughly flush main and lateral lines
with full line pressure. Repeat whenever system is opened up for
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RECLAIMED WATER IRRIGATION
32 8426-14
repairs or replacements. Start flushing operation at highest point of
delivery and proceed to lowest.
F.
3.04
2.
Risers to rotary heads shall be installed plumb and secured in
position with thoroughly compacted sand.
3.
In new turf fields, rotary heads shall be temporarily set 3 inch
minimum above grade and then lowered into permanent position as
required.
4.
Rotary heads in turf areas shall be provided with rubber tops.
5.
Part circle rotor heads shall be adjusted to minimize spray water
onto adjacent track or paving surfaces.
6.
Adjust spray nozzles to minimize overspray and so entire system
will be evenly balanced as required.
7.
Install rotary heads on factory assembled triple-swing joints or
triple-swing joints assembled with PVC Schedule 80 nipples and
Marlex 90 degree elbows.
8.
Unless overspray or run off flows into the landscaping then
overhead irrigation is not permitted within 24 inches of
nonpermeable surfaces.
Pop-up Head Installation:
1.
Pop-up head shall be installed flush with finished grade and 4
inches from edge of walks, and 9 inches from buildings to parking
areas.
2.
Install pop-up heads on factory assembled triple-swing joints or
triple-swing joints assembled with PVC Schedule 80 nipples and
Marlex 90 degree elbows.
VALVE BOX INSTALLATION
A.
Automatic control valves shall be enclosed in valve boxes of HDPE or
polyolefin fibrous material, with locking lids.
B.
Valve boxes shall be of sufficient size to provide no less than 1 1/2-inch of
clearance on all sides of equipment installed within. The bottom section
shall be slotted so as to extend below the pipe. Extensions shall be added
as required to meet grade requirements.
C.
Valve boxes installed in concrete or asphalt shall be set one inch below
pipe and extensions shall be added as required to meet grade requirements.
A homogeneous finished material shall surround valve boxes 4 inches
below finished grade and match existing grade conditions.
PROJECT NAME
SCHOOL NAME
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RECLAIMED WATER IRRIGATION
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D.
Valve boxes shall be installed level to finish grade except in ground cover
areas which shall extend 2 inches above finish grade.
E.
Bottom of valve boxes shall be set level on four full size corner bricks on
2 inches of gravel bed.
F.
Pea gravel shall be filled up to the bottom of the manual and remote valve
and at least 4 inches of gravel inside of the valve box.
EDIT NOTE: USE DISTRICT STANDARD DETAILS FOR THE
FOLLOWING AND REFERENCE THEM ON THE DRAWINGS
AND EDIT ACCORDINGLY.
3.05
QUICK COUPLER VALVES AND ASSEMBLIES
A.
3.06
Quick couplers shall be one inch brass with one or two piece bodies and
locking brass tops with purple rubber or vinyl covers.
1.
For typical Baseball infield application behind Pitcher’s mound,
use quick coupler installed in 8-inch round, bolted, yard box.
2.
For football fields, install quick coupler up against cement curb
surrounding the football field, and as indicated on the drawings.
3.
For athletic fields, install at the perimeter of the field, and as
indicated on the drawings.
4.
In other applications, install next to walkways.
5.
Top of quick coupler assembly shall be installed within 2 inches
from bottom of yard box cover.
6.
Reclaimed Water Irrigation Quick Coupler supply piping shall
originate from a Point of Connection upstream of the Master
Valve.
HOSE BIBS
A.
A.
Hose bibs are prohibited.
B.
Where hose bib connections are required provide a quick coupler
valve.3.07
VALVES
ISOLATION AND SHUT-OFF VALVES
1.
Pressure piping system shall be furnished with valves at points
indicated on Drawings or specified.
2.
Valves shall be installed with neat appearance and groupings, so
parts are easily accessible. Valves near walks, curbs etc., to be set
in 12 inches and parallel to the adjacent surface. Remote control
PROJECT NAME
SCHOOL NAME
10/01/2011
RECLAIMED WATER IRRIGATION
32 8426-16
valves shall be installed in ground cover or shrub areas wherever
possible.
3.
B.
3.08
Remote Control Valves:
1.
Remote control valves shall be low wattage (24 volts,) and shall be
capable of operating properly on no larger than 14 gage UF wire.
2.
Remote control valves shall be adjustable to control flow of water
through valve adjustments and shall be accessible through valve
boxes installed above each valve. Valves shall be highest quality
of manufacturer.
3.
Remote control valves shall be installed and adjusted so that
sprinkler heads operate at pressure recommended by head
manufacturer. Remote control valves shall be adjusted so that
sprinkler heads to planting areas from each individual valve system
applies a uniform distribution of water.
4.
Remote control valves on any line shall be installed 3 inch
minimum, 8 inch maximum below finish grade to top of flow
control stem.
5.
Remote control valves shall be installed with schedule 80 PVC
nipples on each side of the valve.
6.
Valves for lawn and shrub areas shall be installed within the
perimeter of the area it serves. The location shall be accessible
within 12 inches from curb or sidewalk and installed in a location
to avoid wetting the person operating the valve manually.
7.
Remote control valves for athletic fields shall be installed in one of
the following specified locations:
a.
Control valves shall be installed in groups of three or more.
They shall be installed on the perimeter of the athletic field
in valve boxes.
b.
Control valves above ground shall be grouped together and
installed on the perimeter outside of the athletic field, on a
copper manifold and enclosed in a secure fenced enclosure.
CONTROLLER, CLOCK AND ENCLOSURES
A.
3.09
Valves shall be full size of line in which they are installed unless
otherwise indicated.
Refer to Section 32 8416.
COVERAGE TEST
PROJECT NAME
SCHOOL NAME
10/01/2011
RECLAIMED WATER IRRIGATION
32 8426-17
A.
When sprinkler system has been completed, perform a coverage test to
determine if coverage of water to turf and planting areas is complete and
adequate.
B.
Make adjustments, add heads, change heads, nozzles or orifices as may be
required to provide complete coverage and provide layout indicated on
Drawings.
3.10
CONTROL WIRE
A.
Mainline control wires shall be taped together at five-foot intervals with
black electrical tape, then laid parallel to pressure line with 18 inches
minimum cover to finish grade.
B.
Control wiring located under paved areas shall be encased in Schedule 40
PVC pipe and shall extend a minimum of 12 inches beyond pavement.
C.
Wires shall be color coded, white for common ground wire, red or black
for valve control wires.
D.
Wire splicing shall only be performed in controller cabinet and at remote
control valve boxes. Splices shall be made with a mechanical connector
equal to Spears Dry Splice Wire Connectors and encased in epoxy resin to
provide a permanent watertight connection.
E.
Stubbed out control wires shall terminate in concrete yard boxes.
F.
Wire passing under future or existing paving or structures shall be encased
in Schedule 40 PVC pipe extending at least 12 inch beyond edges of the
paving or structure.
3.11
PRESSURE TEST
A.
After welded joints have cured at least 24 hours and before sprinkler heads
are installed, flush out lines and cap outlets. Test system under normal
street water pressure, in presence of the Project Inspector.
B.
Joints shall remain exposed for examination during pressure test. Center
load pipe with small amount of sand to prevent arching or slipping under
pressure. Use normal street water pressure for test. Maintain pressure on
plastic pipe for not less than four hours.
C.
Replace or repair system, including joints that fail during pressure test.
Repeat pressure testing until entire system passes the test period without
leaks.
3.12
IRRIGATION PUMPS
A.
Install on flat, level concrete pad per manufacture recommendations.
B.
The above grade inlet and outlet piping shall be type L copper piping.
PROJECT NAME
SCHOOL NAME
10/01/2011
RECLAIMED WATER IRRIGATION
32 8426-18
C.
3.13
PROTECTION
A.
3.14
Coordinate pump installation with electrical work.
Protect the Work of this section until Substantial Completion.
CLEANUP
A.
Remove rubbish, debris, and waste materials and legally dispose of off the
Project site. Hard surfaces shall be washed clean. Daily clean up shall be
required on areas used for circulation, parking, or other use.
END OF SECTION
PROJECT NAME
SCHOOL NAME
10/01/2011
RECLAIMED WATER IRRIGATION
32 8426-19