HomeMy WebLinkAboutENCLAVE AT REDWOOD - FDP220014 - SUBMITTAL DOCUMENTS - ROUND 6 - SUPPORTING DOCUMENTATION (3)Enclave at Redwood IRRIGATION February 7, 2024
Fort Collins, Colorado 328400 Construction Documents
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PLANTING IRRIGATON - 328400 PAGE 1 OF 17
SECTION 32 84 00 - IRRIGATION
PART 1: GENERAL
1.01 SCOPE:
Provide labor, materials, supplies, equipment, tools, and transportation, and perform all
operations in connection with and reasonably incidental to the complete installation of the
irrigation system, and guarantee/warranty as shown on the drawings, the installation details, and
as specified herein. Items of work specifically included are:
A. Procurement of applicable licenses, permits, and fees.
B. Coordination of Utility Locates ("Call Befo re You Dig").
C. Sleeving for irrigation pipe and wire.
D. Connection of electrical power supply to irrigation control system.
E. Preparation of Record Drawings.
F. Winterization and Spring Start-up
G. Maintenance period.
1.02 SUBMITTALS:
A. Deliver PDF of submittals to the Owner’s Representative. Furnish information with table
of contents and index sheet. Index sections for different components and label with
specification section number and name of component. Furnish submittals for components
on material list. Indicate which items are being supplied on catalog cut sheets when
multiple items are shown on one sheet. Incomplete submittals will be returned without
review.
B. Materials List: Include sleeving, pipe, fittings, mainline components, sprinkler
components, bubbler components, control system components, and other components
shown on drawings and installation details or described herein. Include pipe sealant, wire,
wire connectors, ID tags, and other miscellaneous items. Quantities of materials need not
be included.
C. Manufacturers' Data: Submit manufacturers' catalog cuts, specifications, and operating
instructions for equipment shown on materials list.
1.03 RULES AND REGULATIONS:
A. Provide work and materials in accordance with latest edition of National Electric Code,
Uniform Plumbing Code, and applicable laws, regulations, and codes of governing
authorities.
B. When contract documents call for materials or construction of better quality or larger size
than required by above-mentioned rules and regulations, provide quality and size required
by contract documents.
C. If quantities are furnished either in specifications or on drawings, quantities are furnished
for information only. It is Contractor's responsibility to determine actual quantities of
material, equipment, and supplies required by the project and to complete independent
estimate of quantities and wastage.
D. Notify Owner’s Representative in writing prior to construction about discrepancies
between contract documents and existing site conditions or manufacturer’s specific
recommendations for use of their product.
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Fort Collins, Colorado 328400 Construction Documents
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E. Contractor is responsible for damage to site amenities during construction. Replace
damaged items with identical materials of equal value to match existing conditions. Make
replacements at no additional cost to contract price. Penalty for specific damage: as
valued by an independent auditor or as mutually agreed to by Owner and Contractor.
1.04 TESTING:
A. Schedule testing with Owner’s Representative a minimum of three days in advance of
testing.
B. Mainline pipe may be subjected to pressure test at any time after partial completion of
backfill. Allow irrigation pipe jointed with solvent-welded PVC joints to cure at least 24
hours before testing.
C. Subsections of mainline pipe may be tested independently, subject to review of Owner’s
Representative.
D. Provide clean, clear water, pumps, labor, fittings, and equipment necessary to conduct
tests or retests.
E. Test Documentation:
1. Submit a written report of all tests to Owner’s Representative. Each test must list
name of test, date of test, name of the individual completing the test, name of the
company completing the test. Submit test documentation to Owner ’s
Representative within three (3) days of completing test.
2. Hydraulic Pressure Test – Include starting and ending pressures. If pipe does not
pass test, document reason for pressure loss.
3. Copper Tracing Wire – Include voltage readings for length of tested wire. If wire
does not pass test, document reason for voltage failure.
4. Control System Grounding – Include identification of each grounding equipment
by the remote control valve number and the ohms resistance to ground.
F. Hydrostatic Pressure Test (Solvent Weld):
1. Subject mainline pipe to hydrostatic pressure equal to 120 PSI for two hours.
Test with mainline components installed.
2. Backfill to prevent pipe from moving under pressure. Expose couplings and
fittings.
3. Purge air from mainline pipe before test. Attach pressure gauge to mainline pipe
in test section.
4. Observe pressure loss on pressure gauge. If pressure loss is greater than 5 PSI,
identify reason for pressure loss. Replace defective pipe, fitting, joint, valve, or
appurtenance. Repeat test until pressure loss is equal to or less than 5 PSI.
5. Visually inspect irrigation pipe for leakage and replace defective pipe, fitting,
joint, valve, or appurtenance. Repeat test until pipe passes test.
6. Cement or caulking to seal leaks is prohibited.
G. Volumetric Leakage Test (Gasketed):
1. Volumetric leakage test to be conducted for 3-inch and larger mainline pipe.
2. Backfill to prevent pipe from moving under pressure. Expose couplings and
fittings.
3. Purge air from pipeline before test.
4. Subject mainline pipe to 120 PSI for two hours. Maintain constant pressure.
5. Provide all necessary pumps, bypass piping, storage tanks, meters, 3-inch test
gauge, supply piping, and fittings in order to properly perform testing.
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Fort Collins, Colorado 328400 Construction Documents
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PLANTING IRRIGATON - 328400 PAGE 3 OF 17
6. Testing pump must provide a continuous 1 20-PSI pressure to the mainline pipe.
Allowable deviation in test pressure is 5-PSI during test period. Restore test
pressure to 120-PSI at end of test.
7. Water added to mainline pipe must be measured volumetrically to nearest 0.10
gallons.
8. Use following table to determine maximum allowable volume lost during test:
Leakage Allowable (Gallons per (100 Joints) / Hour)
Test Pressure (PSI)
PIPE SIZE
(INCHES)
60
70
80
90
100
110
120
130
140
3” 0.31 0.34 0.36 0.38 0.41 0.43 0.44 0.46 0.48
4" 0.42 0.45 0.48 0.51 0.54 0.57 0.59 0.62 0.64
Note: Allowable Leakage calculated using L = (ND√P)/7400
Where: L = Allowable Leakage (gph)
N = Number of Joints
D = Nominal Diameter of Pipe (inches)
P = Average Test Pressure (psi)
9. Replace defective pipe, fitting, joint, valve, or appurtenance. Repeat test until
pipe passes test.
10. Cement or caulking to seal leaks is prohibited.
11. Contractor may sub-contract testing to pipeline testing company approved by
Owner.
H. Operational Test:
1. Activate each remote control valve in sequence from controller. Manually
activating remote control valve using manual bleed mechanism at remote control
valve is not an acceptable method of activation. Owner’s Representative will
visually observe operation, water application patterns, and leakage.
2. Replace defective remote control valve, decoder, solenoid, two wire cable,
wiring, or appurtenance to correct operational deficiencies.
3. Replace, adjust, or move water emission devices to correct operational or
coverage deficiencies.
4. Replace defective pipe, fitting, joint, valve, sprinkler, or appurtenance to correct
leakage problems. Cement or caulking to seal leaks is prohibited.
5. Repeat test(s) until each lateral passes all tests. Repeat tests, replace components,
and correct deficiencies at no additional cost to Owner.
I. Copper Tracing Wire:
1. Pass current through wire and demonstrate that wire is capable of locating all
mainline pipe.
2. If wire will not pass current, locate break in circuit, repair or replace wire or
splice, and test until tracer wire works in accordance with its intended use.
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PLANTING IRRIGATON - 328400 PAGE 4 OF 17
J. Control System Grounding:
1. Test for proper grounding of control system and two wire cab le per
manufacturer's recommendations. Test results must meet or exceed
manufacturer's guidelines for acceptan ce.
2. Replace defective wire, grounding rods, or appurtenances. Repeat test until
manufacturer's guidelines are met.
K. Testing Review:
1. Failure of initial testing review will require additional review. Payment of costs,
including travel expenses and site visits by Owner’s Representative, for
additional reviews that may be required due to non-compliance with the
Construction Documents will be Contractor’s responsibility.
L. Field Mock Up:
1. Fabricate an on-site example of the following assemblies for demonstration prior
to construction. The mock-ups must be presented to the Owner’s Representative
and meet approval prior to construction.
a. Remote Control Valve Assembly: Mock-up is to include remote control
valve, wire splices, two wire cable, and decoder.
b. Decoder Grounding: Mock-up is to include decoder, wire splices, and
grounding equipment.
1.05 CONSTRUCTION REVIEW:
The purpose of on-site reviews by Owner’s Representative is to periodically observe work in
progress, Contractor's interpretation of construction do cuments, and to address questions with
regard to installation.
A. Schedule reviews for irrigation system layout or testing with Owner’s Representati ve as
required by these specifications.
B. Impromptu reviews may occur at any time during project.
C. A review will occur at completion of irrigation system installation and Project Record
Drawing submittal.
1.06 GUARANTEE/WARRANTY AND REPLACEMENT:
The purpose of guarantee/warranty is to ensure that Owner receives irrigation materials of prime
quality, installed and maintained in thorough and careful manner.
A. Guarantee/warranty irrigation materials, equipment, and workmanship against defects for
period of one year from formal written acceptance by Owner’s Representative. Fill and
repair depressions. Restore landscape, utilities, structures and site features damaged by
settlement of irrigation trenches or excavations. Repair damage to premises caused by
defective items. Make repairs within seven days of notification from Owner’s
Representative.
B. Replace damaged items with identical materials and methods per contract documents or
applicable codes. Make replacements at no additional cost to contract price.
C. Guarantee/warranty applies to originally installed materials and equipment, and
replacements made during guarantee/warranty period.
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Fort Collins, Colorado 328400 Construction Documents
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PLANTING IRRIGATON - 328400 PAGE 5 OF 17
PART 2: MATERIALS
2.01 QUALITY:
Use new materials without flaws or defects.
2.02 SUBSTITUTIONS:
A. Use specified equipment, or pre-approved equal. Alternative equipment must be
approved by Engineer prior to bidding. Changes and associated design c osts to
accommodate alternative equipment are Contractor’s responsibility.
B. Pipe sizes referenced in the construction documents are minimum sizes and may be
increased at Contractor’s option.
2.03 SLEEVING:
A. Provide sleeve beneath hardscape for irrigation pipe. Provide separate sleeve beneath
hardscape for two wire cable.
B. Provide PVC Class 200 pipe with solvent welded joints for sleeving material beneath
hardscape.
C. Sleeve sizing: A minimum of twice the nominal diameter of solvent-welded pipe or
wiring bundle, or as indicated on drawings.
2.04 PIPE AND FITTINGS:
A. Mainline Pipe and Fittings:
1. Use rigid, unplasticized polyvinyl chloride (PVC) 1120, 1220 Na tional Sanitation
Foundation (NSF) approved pipe, extruded from material meeting requirements
of Cell Classification 12454-A or 12454-B, ASTM Standard D1784, with
integral belled end.
2. Use Class 200, SDR-21, rated at 200 PSI, conforming to dimensions and
tolerances established by ASTM Standard D2241.
3. Use rubber-gasketed pipe equipped with factory installed reinforced gaskets for
mainline pipe with nominal diameter greater than or equal to 3-inches. Use
Gasketed pipe joints conforming to “Laboratory Qualifying Tests” section of
ASTM D3139. Use gasket material conforming to ASTM F477. Use Harco,
Leemco or approved equal rubber-gasketed deep bell ductile iron fittings
conforming to ASTM A-536 and ASTM F-477. Use lubricant approved by pipe
manufacturer.
4. Use solvent weld pipe for mainline pipe. Use Schedule 40, Type 1, PVC solvent
weld fittings conforming to ASTM Standards D2466 and D1784. Use primer
approved by pipe manufacturer. Use solvent cement conforming to ASTM
Standard D2564.
5. Mainline pipe within sleeves: Use solvent weld pipe for mainline pipe with
nominal diameter 3-inches and smaller installed within sleeves. Use pipe
equipped with factory installed reinforced ga skets for mainline pipe with nominal
diameter of 4-inches and larger installed within sleeves. Provide restrained casing
spacers where gasketed joints occur within sleeve.
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B. HDPE Mainline Pipe and Fittings:
1. Use high density, extra high molecular weight polyet hylene pipe (HDPE),
extruded from material meeting the specifications of cell classification 445574C,
ASTM standard D 3350, PE4710, DR 9, rated at 200 PSI or SDR 11, rated at 160
PSI, conforming to the dimensions and tolerances established by AWWA C906
and/or ASTM F 714 (if applicable).
2. Join pipe lengths using butt-fusion technique as recommended by pipe
manufacturer. Join HDPE to dissimilar pipe materials using HDPE (butt -fusion)
x flange adapter with ductile iron back-up ring.
C. Lateral Pipe and Fittings:
1. Use rigid, unplasticized polyvinyl chloride (PVC) 1120, 1220 National Sanitation
Foundation (NSF) approved pipe, extruded from material meeting requirements
of Cell Classification 12454-A or 12454-B, ASTM Standard D1784, with
integral belled end suitable for solvent welding.
2. Use Class 160, SDR-26, rated at 160 PSI, conforming to dimensions and
tolerances established by ASTM Standard D2241. Use PVC pipe rated at higher
pressures than Class 160 in cases where small nominal diameters are not
manufactured in C lass 160. Use solvent weld pipe for lateral pipe. Use Schedule
40, Type 1, PVC solvent weld fit tings conforming to ASTM Standards D2466
and D1784 for PVC pipe. Use primer approved by pipe manufacturer. Solvent
cement to conform to ASTM Standard D2564, of type approved by pipe
manufacturer.
3. For drip irrigation laterals downstream of zone control valves, use UV radiation
resistant polyethylene pipe manufactured from Prime Union Carbide G -resin
7510 Natural 7 manufactured by Union Carbide or a Union Carbide Licensee
with a minimum of 2 -percent carbon black.
Use PVC/compression line fittings compatible with drip lateral pipe. Use tubing
stakes or landscape fabric staples to hold above-ground pipe in place.
D. Specialized Pipe and Fittings:
1. Copper pipe: Use Type "K" rigid pipe conforming to ASTM Standard B88.
Use wrought copper or cast bronze fittings, soldered, flared mechanical, or
threaded joint per installation details or local code. Use a 95-percent tin and 5-
percent antimony solder.
2. Ductile iron pipe: Use Class 50 conforming to ANSI A21.51 (AWWA C151).
Use minimum of Class 53 thickness pipe for flanged piping.
Use mechanical joints conforming to ANSI A 21.10 (AWWA C110) and ANSI
A21.11 (AWWA C111) or flanged fittings conforming to ANSI/AWWA C110
and ANSI B16.1 (125#).
3. Use dielectric union wherever copper -based metal (copper, brass, bronze) is
joined to iron-based metal (iron, galvanized steel, stainless steel).
4. Low Density Polyethylene Hose:
a. Use pipe specifically intended for use as flexible swing joint.
Inside diameter: 0.490+0.010 inch.
Wall thickness: 0.100+0.010 inch.
Color: Black.
b. Use spiral barb fittings supplied by same manufacturer as hose.
5. Use stainless steel fasteners and rubber gaskets for flanged connections.
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Fort Collins, Colorado 328400 Construction Documents
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PLANTING IRRIGATON - 328400 PAGE 7 OF 17
6. Use PVC Schedule 80 nipples and PVC Schedule 40 threaded fittings for
threaded pipe connections.
7. Joint sealant: Use non-hardening, nontoxic pipe thread sealant formulated for use
on threaded connections and approved by pipe fitting or valve manufacturer.
E. Joint Restraint Harness:
1. Provide joint restraint harness components as recommended by pipe and fitting
manufacturer and in accordance with accepted industry practices. For joint
restraints on ductile iron pipe applications, use restraint components constructed
of 60-42-10 ductile iron conforming to ASTM A536. For joint restraints on PVC
pipe applications, use restraint components constructed of 60-42-10 ductile iron
conforming to ASTM A536-80 and ASTM F1674-96.
2. Use bolts, nuts, retaining clamps, all -thread, or other joint restraint harness
materials which are zinc plated or galvanized.
3. Restrained Casing Spacers: Provide Ford Uni-Flange Restrained Casings Spacers
or equal. Use restrainer body and runner supports constructed of high strength
ductile iron meeting ASTM A536 and grade 65 -42-12. Use Connecting rods
conforming to ASTM A242, ANSI/AWW AC111/A21.11. Use runners
constructed of ultra high molecular weight polymer.
2.05 COPPER TRACING WIRE:
1. Use American Wire Gauge (AWG) No. 12-1 solid copper, 600-volt, Type UF or
PE cable, UL approved for direct underg round burial.
2. Color: Tracing wire must be of color different from that of any active two wire
cable, control wire, or common wire. Wire color shall be continuous over entire
length.
3. Splices: Use 3M DBR/Y-6 wire connector with waterproof sealant.
2.06 MAINLINE COMPONENTS:
A. Winterization Assembly: as presented in drawings and installation det ails.
B. Backflow Prevention Assembly: as presented in drawings and installation details and per
local codes.
C. Isolation Gate Valve Assembly: as presented in drawings and installation details.
D. Master Valve Assembly: as presented in drawings and installation details.
E. Flow Sensor Assembly: as presented in drawings and installation details.
F. Blow Out Assembly: as presented in drawings and installation details.
G. Quick Coupling Valve Assembly: as presented in drawings and installation details.
H. Air Vacuum Relief Valve Assembly: as presented in drawings and installation details.
I. Yard Hydrant: as presented in drawings and installation details.
J. POC Assembly: as presented in drawings and installation details.
2.07 SPRINKLER AND BUBBLER IRRIGATION COMPONENTS:
A. Remote Control Valve (RCV) Assembly for Sprinkler and Bubbler Laterals: as presented
in drawings and installation details.
B. Sprinkler Assembly: as presented in drawings and installation de tails.
C. Bubbler Assembly: as presented in drawings and installation details.
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Fort Collins, Colorado 328400 Construction Documents
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2.08 DRIP IRRIGATION COMPONENTS:
A. Remote Control Valve (RCV) Assembly for Drip Laterals: as presented in drawings and
installation details.
B. Zone Control Valve Assembly: as presented in drawings and installation details.
C. Drip Emitter Assembly:
1. Use emitter device as presented in drawings and installation details.
2. Use flexible plastic distribution tubing to direct water from emitter outlet to
emission point. Use distribution tubing compatible with emitters. Do not exceed
five feet length between emitter and distribution tubing outlet. Use tubing stakes
to anchor distribution tubing.
D. Flush Cap Assembly: as presented in drawings and installation details.
E. Tree Ring Assembly: as presented in drawings and installation details.
F. Inline Drip Flush Valve Assembly: as presented in d rawings and installation details.
2.09 CONTROL SYSTEM COMPONENTS:
A. Irrigation Controller Assemblies:
1. As presented in drawings and installation details.
2. Electrical conduit: Use PVC Schedule 40 conduit conforming to dimensions and
tolerances established by ASTM Standard D -1785. Use Schedule 40, Type 1,
PVC solvent weld sweep fittings for PVC conduit conforming to ASTM
Standards D2466 and D1784 for buried installations. Use rigid metallic conduit
with sweep elbows for above grade installations.
B. Power Wire:
1. Use AWG #12, solid or stranded copper, Type UF single -conductor cable or
multi-conductor with ground cable, UL approved fo r direct underground burial
from power source to Controller Assembly.
2. Splices: Use 3M #82-A2 Series with Split Bolts or Butt Connectors for inline
splices and 82-B1 or 90-B1 Series for wye splices.
3. Electrical conduit: Use PVC Schedule 40 conduit conformi ng to dimensions and
tolerances established by ASTM Standard D-1785. Use Schedule 40, Type 1,
PVC solvent weld sweep fittings for PVC conduit conforming to ASTM
Standards D2466 and D1784 for buried installations. Use rigid metallic conduit
with sweep elbows for above grade installations.
4. Warning tape: Inert plastic film highly resistant to alkalis, acids, or other
destructive chemical components likely to be encountered in soils. Three inches
wide, colored red, and imprinted with "CAUTION: BURIED ELECTRIC LINE
BELOW."
C. Two Wire Cable From Controller to Decoders:
1. Use two wire cable per controller manufacturer’s guidelines.
2. Splices: Rain Bird WC20
3. Electrical conduit: Use PVC Schedule 40 conduit conformin g to dimensions and
tolerances established by ASTM Standard D -1785. Use Schedule 40, Type 1,
PVC solvent weld sweep fittings for PVC conduit conforming to ASTM
Standards D2466 and D1784 for buried installations. Use rigid metallic conduit
with sweep elbows for above grade installations.
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4. Warning tape: Inert plastic film highly r esistant to alkalis, acids, or other
destructive chemical components likely to be encountered in soils. Three inches
wide, colored red, and imprinted with "CAUTION: BURIED ELECTRIC LINE
BELOW."
5. Ground two wire cable per manufacturer’s guidelines.
D. Low Voltage Control Wire:
1. Use American Wire Gauge (AWG) No. 14-1 solid copper, 600 volt, Type UF or
PE cable, UL approved for direct underground burial for individual control wires
and spare control wires from the controller assembly to each remote control valve
or stub-out location. Use American Wire Gauge (AWG) No. 12-1 solid copper,
600 volt, Type UF or PE cable, UL approved for direct underground burial for
common ground wire and spare common wires from controller assembly to each
remote control valve or stub-out location.
2. Color: Use white for common ground wire. Use easily distinguished colors for
other control wires. Spare control wires shall be of color different from that of
active control wire. Wire color shall be continuous over entire length.
3. Splices: Use 3M DBR/Y-6 wire connector with waterproof sealant.
4. Electrical conduit: Use PVC Schedule 40 conduit conforming to dimensions and
tolerances established by ASTM Standard D -1785. Use Schedule 40, Type 1,
PVC solvent weld sweep fittings for PVC conduit conforming to ASTM
Standards D2466 and D1784 for buried installations. Use rigid metallic conduit
with sweep elbows for above grade installations.
5. Warning tape: Inert plastic film highly resistant to alkalis, acids, or other
destructive chemical components likely to be encountered in soils. Three inches
wide, colored red, and imprinted with "CAUTION: BURIED ELECTRIC LINE
BELOW."
E. Instrumentation:
1. As presented in the drawings and installation details.
2. Rain Sensor Assembly – as presented in drawings and installation details.
2.10 OTHER COMPONENTS:
A. Tools and Spare Parts: Furnish operating keys, servicing tools, test equipment, spare parts
and other items indicated in drawings and specifications.
B. Other Materials: Provide other materials or equipment shown on drawings or installation
details that are part of irrigation system, even though items may not have been referenced
in specifications.
PART 3: EXECUTION
3.02 INSPECTIONS AND REVIEWS:
A. Site Inspections:
1. Verify construction site conditions and note irregularities affecting work of this
section. Report irregularities in writing to Owner’s Representative prior to
beginning work.
2. Commencement of work implies acceptance of existing site conditions.
B. Utility Locates ("Call Before You Dig"):
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1. Arrange and coordinate Utility Locates with local authorities prior to
construction.
2. Repair underground utilities that are damaged during construction. Make repairs
at no additional cost to contract price.
3.03 LAYOUT OF WORK:
A. Stake out irrigation system. Items staked include: sprinklers, pipe, sleeves, remote
control valves, quick coupling valves, and isolation valves.
B. Irrigation System Layout Review: Irrigation system layout review will occur after
staking has been completed. Notify Owner’s Representative one week in advance of
review. Modifications will be identified by Owner’s Representative at this review.
C. Install irrigation components inside of project property lines.
3.04 EXCAVATION, TRENCHING, AND BACKFILLIN G:
A. Excavate and install pipes at minimum cover indicated in drawings or specifications.
Excavate trenches at appropriate width for connections and fittings.
B. Minimum cover (distance from top of pipe or control wire to finish grade):
1. Mainline pipe (3-inch and larger): 30-inches to top of pipe.
2. Mainline pipe (2.5-inch and smaller): 24-inches to top of pipe.
3. Electrical conduit: 24-inches to top of pipe.
4. Two Wire Cable & Control Wire: 2-inch offset from bottom of mainline pipe.
5. Lateral pipe to sprinklers and bubblers: 14-inches to top of pipe.
6. Manifold pipe: 14-inches to top of pipe.
7. Drip lateral pipe in planting beds downstream of drip system zone control valves:
Secure to finish grade with approved tubing stakes. Install and test prior to
installation of landscape fabric and mulch.
C. Maintain at least 10-feet clearance from centerline of trees.
D. PVC lateral pipe and manifold pipe must be installed in open trench. Pipe pulling is not
allowed. Install pipe at burial depths listed above.
E. Backfill only after lines have been reviewed and tested.
F. Excavated material is generally satisfactory for backfill. Use backfill free from rubbish,
vegetable matter, frozen materials, and stones larger than 2-inches in maximum
diameter. Remove material not suitable for backfill. Use backfill free of sharp objects
next to pipe.
G. Backfill buried pipe in either of the following manners:
1. Backfill and puddle lower half of trench. Allow to dry 24 hours. Backfill
remainder of trench in 6-inch layers. Compact to density of surrounding soil.
2. Backfill trench by depositing backfill material equally on bo th sides of pipe in 6-
inch layers and compacting to density of surrounding soil.
H. Enclose pipe and wiring beneath roadways and hardscapes in separate sleeves.
Minimum compaction of backfill for sleeves shall be 95 percent Standard Proctor
Density, ASTM D698-78. Use of water for compaction around sleeves, "puddling",
will not be permitted.
I. Dress backfilled areas to original grade. Incorporate excess backfill into existing site
grades.
J. Contact Owner’s Representative for trench depth adjustments where utilitie s conflict
with irrigation trenching and pipe work.
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3.05 SLEEVING AND BORING:
A. Provide sleeving at depth that permits encased pipe or wiring to remain at specified
burial depth.
B. Extend sleeve ends twelve inches beyond edge of hardscape. Cap sleeve ends and mar k
with stakes. Provide rope or wire through sleeve and secure to stake at surface grade at
each end for future sleeve location.
C. Bore for sleeves under obstructions that cannot be removed. Employ equipment and
methods designed for horizontal boring.
D. Temporarily cap sleeve ends with duct tape to minimize dirt intrusion for sleeves not
utilized currently for irrigation use.
3.06 ASSEMBLING PIPE AND FITTINGS:
A. General:
1. Keep pipe free from dirt and debris. Cut pipe ends square, debur and clean as
recommended by manufacturer.
2. Keep ends of assembled pipe capped. Remove caps only when necessary to
continue assembly.
3. Trenches may be curved to change direction or avoid obstructions within limits
of the curvature of pipe. Curvature results from bending of pipe lengths. Do not
exceed pipe and fitting manufacturer’s allowable deflection at joints. Minimum
radius of curvature and offset per 20-foot length of pipe-by-pipe size are shown
in following table.
SIZE
RADIUS
OFFSET PER
20' LENGTH
1 ½"
25'
3'-4"
2"
25'
3’-4”"
2 ½"
100'
1'-11"
3"
100'
1'-11"
4"
100'
1'-11"
B. Mainline Pipe and Fittings:
1. Use only strap-type friction wrenches for threaded plastic pipe.
2. PVC Rubber-Gasketed Pipe:
a. Use pipe lubricant. Join pipe in manner recommended by manufacturer
and in accordance with accepted industry practices.
3. PVC Solvent Weld Pipe:
a. Use primer and solvent cement. Join pipe in manner recommended by
manufacturer and in accordance with accepted industry practices.
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PLANTING IRRIGATON - 328400 PAGE 12 OF 17
b. Cure for 30 minutes before handling and 24 hours before allowing water
in pipe.
c. Snake pipe from side to side within trench.
4. Fittings:
a. Use of cross type fittings is not permitted.
C. HDPE Mainline Pipe and Fittings:
1. Fusion equipment operators to be trained and certified per ASTM F3190. Join
pipe lengths using butt-fusion techniques per ASTM F2620 and as recommended
by pipe manufacturer.
2. Join HDPE pipe to dissimilar pipe materials using HDPE (butt-fusion) x flange
adapter with ductile iron back-up ring. Provide flanged transition fitting as
required for connection to dissimilar pipe material.
D. Lateral Pipe and Fittings:
1. Use only strap-type friction wrenches for threaded plastic pipe.
2. PVC Solvent Weld Pipe:
a. Use primer and solvent cement. Join pipe in manner recommended by
manufacturer and in accordance with accepted industry practices.
b. Cure for 30 minutes before handling and 24 hours before pressurizing or
installing with vibratory plow.
c. Snake pipe from side to side within trench.
3. Fittings: Use of cross type fittings is not permitted.
E. Specialized Pipe and Fittings:
1. Copper Pipe:
a. Use flux and solder. Join pipe in manner recommended by manufacturer
and in accordance with local codes and accepted industry practices.
b. Solder so that continuous bead shows around the joint circumference.
2. Ductile Iron Pipe: Join pipe in the manner recommended by manufacturer and in
accordance with accepted industry practices.
3. Insert dielectric union or flange wherever copper-based metal (copper, brass,
bronze) and iron-based metal (iron, galvanized steel, stainless steel) are joined.
4. Low Density Polyethylene Hose: Install hose and compatible fittings in manner
recommended by manufacturer and in accordance with accepted industry
practices.
5. Flanged connections: Install fittings, fastener s and gaskets in manner
recommended by manufacturer and in accordance with accepted industry
practices.
6. PVC Threaded Connections:
a. Use only factory-formed threads. Field-cut threads are not permitted.
b. Apply thread sealant in manner recommended by component, pipe and
sealant manufacturers and in accordance with accepted industry
practices.
c. Use plastic components with male threads and metal components with
female threads where connection is plastic-to-metal.
F. Joint Restraint Harness:
1. Use on pipe greater than or equal to 3-inch diameter or any diameter of rubber
gasketed pipe. Use a joint restraint harness wherever joints are not positively
restrained by flanged fittings, threaded fittings, and/or thrust blocks.
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2. Use a joint restraint harness with transition fittings between metal and PVC pipe,
where weak trench banks do not allow use of thrust blocks, or where extra
support is required to retain fitting or joint.
3. Use restrained casing spacers for gasket ed pipe routed through sleeving. Install
harness in the manner recommended by the manufacturer and in accor dance with
accepted industry practices. Install self-restraining casing spacers at all gasketed
pipe bell joints and every 10-feet along the gasketed mainline pipe installed
through sleeving. Provide correct number and type of restraints per
manufacturer’s requirements.
3.07 INSTALLATION OF COPPER TRACING WIRE:
A. Install tracing wire as shown in the details.
B. Tape to top centerline of pipe as shown in the details with adhesive tape or plastic tie
straps so that the wire remains in place during embedding and backfilling.
C. Bring tracing wire to the surface in all mainline component valve boxes as shown in the
details.
3.08 INSTALLATION OF MAINLINE COMPONENTS:
A. Winterization Assembly: Provide where indicated on drawings.
B. Backflow Prevention Assembly: Provide where indicated on drawings. Install per local
codes.
C. Isolation Gate Valve Assembly: Provide where indicated on drawings. Install at least
12-inches from and align with adjacent walls or edges of paved areas. Brand “GV” on
valve box lid in 2-inch high letters.
D. Master Valve Assembly: Provide where indicated on drawings. Install at least 12-
inches from and align with adjacent walls or edges of paved areas. Brand “MV” on
valve box lid in 2-inch high letters.
E. Flow Sensor Assembly: Provide where indicated on drawings. Install at least 12-inches
from and align with adjacent walls or edges of paved areas. Brand “FS” on valve box
lid in 2-inch high letters.
F. Blow Out Assembly: Provide where indicated on drawings. Brand “BA” on valve box
lid in 2-inch high letters.
G. Quick Coupling Valve Assembly: Provide where indicated on drawings. Brand “QC”
on valve box lid in 2-inch high letters.
H. Air Vacuum Relief Valve Assembly: Provide where indicated on drawings. Brand
“AV” on valve box lid in 2-inch high letters.
I. Yard Hydrant Assembly: Provide where indicated on drawings.
J. POC Assembly: Provide where indicated on drawings.
3.09 INSTALLATION OF SPRINKLER AND BUBBLER IRRIGATION COMPONENTS:
A. Remote Control Valve (RCV) Assembly for Sprinkler Laterals:
1. Flush mainline before installation of RCV assembly.
2. Provide where indicated on drawings. Use wire connectors and waterproof
sealant to two wire cable and decoder station wiring to remote control valve
wires. Provide connectors and sealant per manufacturer's recommendations.
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3. Provide only one RCV to a valve box. Locate valve box at least 12-inches from
and align with nearby walls or edges of paved areas. Group RCV assemblies
together where practical. Align grouped valve boxes in uniform patterns. Allow
at least 12-inches between valve boxes. Brand controller letter and station
number on valve box lid in 2-inch high letters.
4. Adjust RCV assembly to regulate downstream operating pressure.
5. Attach ID tag with controller station number to control wiring.
B. Sprinkler Assembly:
1. Flush lateral pipe before installing sprinkler assembly.
2. Provide per installation details at locations shown on drawings.
3. Locate spray sprinklers 3-inches from adjacent walls, fences, or edges of paved
areas.
4. Locate rotor sprinklers 3-inches from adjacent walls, fences, or edges of paved
areas.
5. Install sprinklers perpendicular to finish grade.
6. Provide appropriate nozzle or adjust arc of coverage of each sprinkler for best
performance and uniform coverage.
7. Adjust radius of throw of each sprinkler for best performance and uniform
coverage.
C. Bubbler Assembly:
1. Flush lateral pipe before installing bubbler assembly.
2. Provide per installation details at locations shown on drawings.
3. Install bubbler perpendicular to finish grade.
3.10 INSTALLATION OF DRI P IRRIGATION COMPONENTS:
A. Remote Control Valve (RCV) Assembly for Drip Laterals:
1. Flush mainline pipe before installing RCV assembly.
2. Locate as shown on drawings. Connect control wires to remote control valve
wires using wire connectors and waterproof sealant. Provide connectors and
sealant per manufacturer's recommendations.
3. Provide only one RCV to valve box. Locate at least 12-inches from and align
with nearby walls or edges of paved areas. Group RCV assemblies together
where practical. Align grouped valve boxes in uniform patterns. Allow at least
12-inches between valve boxes. Brand controller letter and station number on
valve box lid in 2-inch high letters.
4. Arrange grouped valve boxes in rectangular patterns.
B. Zone Control Valve Assembly: Provide where indicated on drawings. Install at least 12-
inches from and align with adjacent walls or edges of paved areas. Brand “ZCV” on
valve box lid in 2-inch high letters.
C. Drip Emitter Assembly:
1. Locate as shown on drawings and installation details.
2. Flush lateral pipe before installing emitter assembly.
3. Cut emitter outlet distribution tubing square.
4. Use tools manufactured, and techniques recommended, by emitter manufacturer.
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D. Flush Cap Assembly: Provide at end of each drip irrigation lateral pipe as shown and
directed on drawings and installation details. Install at least 12-inches from and align with
adjacent walls or edges of paved areas. Brand “FC” on valve box lid in 2-inch high
letters.
E. Tree Ring Assembly: Provide as shown on drawings and details.
F. Inline Drip Flush Valve Assembly: Provide as shown on drawings and details.
3.11 INSTALLATION OF CONTROL S YSTEM COMPONENTS:
A. Irrigation Controller Assemblies:
1. Location of controller assembly as depicted on drawings is approximate;
Owner’s Representative will determine exact site location during sprinkler layout
review. Install controller assembly in accordance w ith controller manufacturer
recommendations.
2. Lightning protection: Connect to building ground when indoors. Install per
grounding details when installed outdoors.
3. Coordinate connection of electrical service in accordance with local codes.
Provide primary surge protection arrestors on incoming power lines in
accordance with controller manufacturer recommendations.
4. Connect two wire cables to the corresponding controller terminals per the
controller manufacturer recommendations.
B. Power Wire:
1. Install with minimum number of field splices. If power wire must be spliced,
make splice with recommended connector, installed per manufacturer's
recommendations. Locate splices in jumbo rectangular valve box. Coil 3-feet of
wire in valve box.
2. Install power wire using open trenches. Use of a vibratory plow is not permitted.
3. Use green wire as common ground wire from power source to controller
assembly.
4. Carefully backfill around power wire to avoid damage to wire insulation or wire
connectors.
5. Install wire parallel with and below mainline pipe unless noted otherwise on
plans. Install wire at depth required by local co des.
6. Provide continuous run of warning tape above power wire. Install warning tape
six inches above wire. Encase power wire within electrical conduit where not
installed in common trench with PVC mainline pipe.
C. Two Wire Cable From Controller to Decoder:
1. Route cable with mainline pipe. Install with minimum number of field splices.
2. Install cable using open trenches. Use of vibratory plow is not permitted.
3. Provide 24-inch excess length of wire in 8-inch diameter loop at each 90-degree
change of direction, at both ends of sleeves, and at 100-foot intervals along
continuous runs of wiring. Do not tape or tie wiring loop. Coil 30-inch length of
wire within each remote control valve box.
4. Carefully backfill around cable to avoid damage to wire insulation or wire
connectors.
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5. If cable must be spliced, make splice with recommended wire connector,
installed per manufacturer's recommendations. Locate splices in housing afforded
by other control system components or separate 10-inch round valve box. Coil 3-
feet of cable in valve box.
6. Install cable parallel with and offset from mainline pipe unless noted otherwise
on plans.
7. Provide continuous run of warning tape above cable when the cable is not
installed adjacent to mainline pipe. Install warning tape six inches below finish
grade.
8. Lightning protection: Install grounding equipment per manufacturer’s guidelines.
D. Low Voltage Control Wire:
1. Bundle control wires where two or more are in same trench. Bundle with pipe
wrapping tape spaced at 10 -foot intervals. Do not tape wires together where
contained within sleeving or conduit.
2. Provide 24-inch excess length of wire in 8-inch diameter loop at each 90-degree
change of direction, at both ends of sleeves, and at 100 -foot intervals along
continuous runs of wiring. Do not tape or tie wiring loop. Coil 30 -inch length of
wire within each remote control valve box.
3. Install common ground wire and one control wire for each remote control valve.
Multiple valves on single control wire are not permitted.
4. If control wire must be spliced, make splice with wire connectors and waterproof
sealant, installed per manufacturer's instructions. Locate splice in valve box that
contains irrigation valve assembly, or in separate standard rectangular valve box.
Use same procedure for connection to valves as for in -line splices.
5. Install wire 2” offset from bottom of mainline pipe unless noted otherwise on
plans.
6. Encase wiring within electrical conduit where installed above grade.
7. Protect wire not installed with PVC mainline pipe with continuous run of
warning tape placed in backfill six inches above wiring.
E. Rain Sensor Assembly:
1. In stall per manufacturer’s guidelines and in location approved by Owner.
3.12 INSTALLATION OF OTHER COMPONENTS:
A. Tools and Spare Parts: Prior to Review at completion of construction, supply to Owner
operating keys, servicing tools, spare parts, test equipment, and other items indicated in
General Notes on the drawings.
B. Other Materials: Provide other materials or equipment shown on drawings or
installation details that are part of irrigation system, even though items may not have
been referenced in specifications.
3.13 PROJECT RECORD (AS-BUILT) DRAWINGS:
A. Document changes to design. Maintain on-site and separate from documents used for
construction, one complete set of contract documents as Project Documents. Keep
documents current. Do not permanently cover work until accurate “as-built”
information is recorded.
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B. Record pipe and wiring network alterations on a daily b asis. Record work that is
installed differently than shown on construction drawings. Record accurate reference
dimensions, measured from at least two permanent reference points, of each irrigation
system valve, each sleeve end, and other irrigation compone nts enclosed within valve
box.
C. Obtain from Owner’s Representative a reproducible copy of drawings prior to
construction completion. Duplicate information contained on project drawings
maintained on-site using pen or CAD. Label each sheet "Record Drawing".
D. Turn over “Record Drawings” to Owner’s Representative. Completion of Record
Drawings is required prior to final construction review at completion of irrigation
system installation.
3.14 WINTERIZATION AND SPRING START -UP:
A. Winterize irrigation system in fall following completion, or partial completion, of
irrigation system construction. Start-up irrigation system in spring following
completion, or partial completion, of irrigation system construction. Repair any damage
caused in improper winterization at no addi tional cost to Owner. Coordinate
winterization and start-up with landscape maintenance personnel.
3.15 MAINTENANCE:
A. Maintain irrigation system for a duration of 30 calendar days from formal written
acceptance by Owner’s Representative. Make periodic examinations and adjustments to
irrigation system components in order to achieve the most desirable application of
water.
B. Following completion of Contractor's maintenance period, Owner will be responsible
for maintaining system in working order during remainder o f guarantee/warranty
period, for performing necessary minor maintenance, for trimming around sprinklers,
for protecting against vandalism, and for preventing damage after landscape
maintenance operation.
3.16 CLEANUP:
A. Remove from site machinery, tools, excess materials, and rubbish upon completion of
work.
END OF SECTION