HomeMy WebLinkAbout23 L-105 Irrigation SpecificationsL-105
IRRIGATION
SPECIFICATIONS
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GREATER GALLATIN
LANDSCAPE CONTRACTORS
1700 W. KOCH
UNIT 6
BOZEMAN, MT 59715
(406) 570-3784
GGC182021
ENG
02/04/2022
GGC182021-TB
PROPOSED SITE DEVELOPMENT
PLAN DOCUMENTS
PROPOSED
DEVELOPMENT
BUILDING I
OAK & COTTONWOOD STREET
BOZEMAN, MT
.
8/12/2021...........................
REV0 8/12/21 CONCEPT PLAN
REV1 11/19/21 SITE PLAN REVIEW
REV2 02/04/22 SP RESUBMIT 2-4-22
IRRIGATION COMPONENTS AND/OR SYSTEMS
PART 1 ± GENERAL
SECTION INCLUDES
Work to be performed under this Section shall consist of furnishing all labor and materials necessary to
construct a complete working and tested sprinkler irrigation system as per all drawings and
specifications.
REFERENCES
A.ANSI – American National Standards Institute
B.ASIC – American Society of Irrigation Consultants: ASIC Grounding Guideline.
C.ASSE – American Society of Sanitary Engineering: ASSE 1013, 1015: Backflow Preventers,
Pressure Reducers.
D.ASTM – American Society of Testing and Materials
E.IA – The Irrigation Association: Main BMP Document.
F.NFPA – National Fire Protection Association: NFPA 70 National Electrical Code.
G.UL – Underwriters Laboratories: UL Wires and Cables.
PERFORMANCE REQUIREMENTS
A.All work to be performed to current standards of SEI and of the local governing municipality.
B.PVC Pipe: Must be stamped with certified NFS.
C.Contractor shall be responsible to obtain all necessary permits and to comply with electrical
company requirements.
D.No substitutions of materials are allowed unless approved by Landscape Architect.
QUALITY ASSURANCE
A.Contractor shall have considerable experience and demonstrate ability in the installation of
irrigation system(s) of specified type(s) in a neat, orderly, and responsible manner in accordance
with recognized standards of workmanship.
B.All work shall be performed in accordance with the best standards of practice relating to the trade.
C.Contractor shall provide an irrigation as-built drawing to the designer responsible for the irrigation
plan. This drawing shall be overnighted to the respective party within 24 hours of
installation completion.
WARRANTY
A.Contractor shall provide a one year warranty that covers all workmanship and labor.
B.Contractor shall provide a five year warranty that covers all materials.
ROTOR HEADS
A.Pop-up rotor sprinkler for medium turf areas (25-47 feet (7.6-14.3 m), maximum 75 psi (5.2 bar)
specifications include but are not limited to:
1.Shall have adjustable arc rotation of 40 to 360 degrees (0.7 to 6.3 rad) and reversing full circle
rotation.
2.Shall have a flow shut-off device that is integrated into the flow path of the sprinkler.
3.Shall have a pressure-activated, multi-function wiper seal that protects internals from debris
and assures positive pop-up and retraction.
4.Shall contain additional o-rings and seals for extra protection in “gritty” water.
5.Operating precipitation rate of 0.20 to 1.01 inches per hour (5 to 26 mm/h).
6.Operating flow rate of 0.73 to 8.31 gpm (0.17 to 1.85 m3/h).
7.The body, stem, nozzle, and screen shall be constructed of heavy-duty and ultra-violet resistant
plastic.
8.Shall include a 45 psi (3.1 bar) pressure regulating device to prevent high pressure misting to
the nozzle stream.
9.Shall include an internal check valve to prevent low head drainage of up to 7 feet (2.1 m) to
prevent puddling, run-off and erosion.
10.Shall include a set of twelve interchangeable nozzles, 8 nozzles with 25 degree (0.4 rad)
trajectory and 4 low-angle nozzles with 10 degree (0.2 rad) trajectory.
FLEXIBLE SWING PIPE
A.Swing pipe specifications include but are not limited to:
1.Swing pipe shall be flexible black tubing constructed of linear low density polyethylene material
with a wall thickness of 0.098” (0.3 cm) with a nominal inside diameter of 0.49” (1.2 cm).
2.Pipe shall be capable of a flow up to 8 gpm (0.5 l/s).
DRIPLINE
A.Distribution tubing specifications include but are not limited to:
1.The blank tubing shall be manufactured from flexible polyethylene material with a wall thickness
of 0.049” (1.2 mm), outside diameter of 0.634” (16.1 mm), and inside diameter of 0.536” (13.6
mm).
2.The tubing shall be dual-layered (brown over black).
INLINE EMITTER DRIPLINE
A.Sub-surface inline emitter tubing specifications include but are not limited to:
1.The tubing shall be manufactured from flexible polyethylene material with wall thickness of
0.049” (1.2 mm), outside diameter of 0.634” (16 mm), and inside diameter of 0.536” (13.6 mm).
2.The tubing shall have factory installed pressure-compensating, inline emitters with a copper
shield device installed every 12, 18, or 24 inches (30.5, 45.7, 61 cm) as indicated on
construction drawings.
3.Operating pressure range of 8.5 to 60 psi (0.6 to 4.1 bar).
4.Operating emitter flow rates of 0.6 and 0.9 gph (2.3 l/hr and 3.5 l/hr).
DISTRIBUTION TUBING
A.¼” distribution tubing for emitters and other devices specifications include but are not limited to:
1.The blank tubing shall be extruded from ultra-violet resistant polyethylene resin materials with a
wall thickness of 0.04” (1 mm), outside diameter of 0.250” (6.3 mm), and inside diameter of
0.170” (4.3 mm).
2.Operating pressure range from 0 to 60 psi (0 to 4.1 bar).
EMITTERS
A.Point source emission device specifications include but are not limited to:
1.The emitter shall be constructed of ultra-violet resistant acetyl materials.
2.Shall have a pressure-compensating design to deliver a uniform flow throughout a pressure
range of 15 to 50 psi (1.0 to 3.4 bar).
3.Flow rates that range from 0.5 to 2 gph (1.89 to 7.57 l/h) at a pressure range of 15 to 50 psi
(1.0 to 3.4 bar).
VALVE BOX
A.Valve boxes specifications include but are not limited to:
1.Shall be made of structural foam HPDE resin that is resistant to ultra-violet light, weather,
moisture and chemical action of soils.
2.Lids shall be clearly marked with the words “IRRIGATION CONTROL VALVE” molded onto the
top.
3.Lid colors are available in black, green and purple designating non-potable water use.
PART - EXECUTION
EXCAVATION
A.Stake pipe and equipment layout for Owner’s review and approval. Review does not relieve
installer from coverage problems due to improper placement after staking.
B.Excavate trenches for irrigation system pipe to provide minimum cover per plans and details.
C.Barricade trenches that are left open overnight.
INSTALLATION
A.General: Plans are diagrammatic. Proceed with installation in accordance with the following:
1.Install stop and waste valves, backflow preventers, and other equipment required by local
authorities according to laws and regulations in order to make system complete.
a.Coordinate with the General Contractor the responsible for installing the backflow preventer
and other irrigation items at the connection point.
b.Coordinate with the General Contractor the for exact location of the irrigation connection
point.
2.Thoroughly flush main lines before installing automatic control valves, and laterals before
installing sprinklers. Flush supply lines thoroughly before installing backflow preventers or other
regulating devices.
B.Piping: Assemble all mainline and lateral lines in accordance with manufacturer’s
recommendations with no cul-de-sacs. Assure positive drainage.
C.Sleeves: General Contractor shall install sleeves before concrete/paving work.
1.Sleeves should be a minimum two times the diameter of the pipe passing through them.
2.General Contractor shall stub-up and flag sleeve locations for the Irrigation Contractors ease of
locating.
3.Sleeve locations shall be approximate to that shown on the Irrigation Plan.
D.Control Valves:
1.Install one valve per valve box and provide 12 inches of expansion loop slack wire at all
connections inside valve box.
E.Manual Drains:
1.Install per manufacturer’s recommendations on upstream and downstream side of backflow
preventers and at lowest point along main pressure pipe.
F.Quick-Coupling Valves:
1.Install using 1 inch PVC nipples and schedule 40 ells as detailed. Location as indicated on
plans.
G.Backflow Preventer:
1.Install assembly complete for irrigation system with 2 drain valves and 2 shut off valves per
detail, local laws and regulations, and per manufacturer’s specifications.
2.Install assemblies with drain valves in below grade installations. Provide open box floor with
gravel drain sump.
H.Valve Boxes
1.Install over all remote control valves, manual control valves, zone shutoff valves, gate valves,
or globe valves. Size to provide adequate room for maintenance.
2.Install boxes on level subgrade with proper drainage so that top of boxes are flush with finish
grade material (sod, mulch, rock, etc.). Place parallel or perpendicular to adjacent curbs,
sidewalks, or driveways.
3.Place washed gravel aggregate in sump as shown on details.
I.Automatic Controller
1.Properly ground controller per local laws and regulations. Make all control wire connections to
automatic controller. Coordinate controller installation with other electrical work.
2.Connect remote control valves to controller in numerical sequence as shown on Plans.
J.Wire and Electrical Work
1.Use electrical control and ground wire suitable for sprinkler control cable.
2.Provide 120-volt power connection (by others) to automatic controller to conform to local codes,
ordinances and authorities having jurisdiction.
3.Low Voltage Wiring:
a.Bury control wiring between controller and electric valves in pressure supply line trenches,
strung as close as possible to main pipe lines with such wires to be consistently located
below and to one side of the pipe, or in separate trenches.
b.Bundle all 24-volt wires at 10-foot intervals and lay with pressure supply line pipe to one
side of trench.
c.Install control wire for each control valve.
d.Run 2 spare #14-1 wires from controller pedestal or electric control valve on each and
every leg of mainline.
K.Sprinkler Heads, Emitters, Rotators, and Rotors
1.Flush circuit piping with full head of water and install sprinklers after hydrostatic text is
completed.
2.Adjust nozzles to allow for adequate coverage and to minimize overspray onto walks, roads,
driveways, and buildings.
3.Stake emitter tubing with 1/4” Rainbird® TS-025 tubing stakes.
4.Adjust heads to be plumb and flush with finish grades, even with top of soil level or top of
material level after completion of grading, seeding, sodding, and rolling of grass.
L.Drip Tubing
1.Install all drip tubing in locations shown on the Irrigation Plan. To be laid out and installed per
the irrigation drip details (sheet L-2.1).
2.Install flush caps as indicated on details.
3.Install drip indicator on all drip zones.
M.Thrust Blocks and/or Joint Restraints
1.Install on pipe sized 2” or larger wherever the main pipe line:
a.Changes any direction at tees, angles, and crosses vertical and horizontal.
b.Changes at reducers.
c.Stops at a dead-end.
d.Valves at which thrust develops when closed.
BACKFILLING
A.Do not begin backfilling operations until system tests and approvals have been completed.
B.Bed all pipe a minimum of 2 inches. Backfill to 6 inches above pipe with soil free of rocks over
1-inch diameter, debris, or organic matter. Backfill remainder of trench with soil of like quality to
adjacent areas. Haul away all material not suitable for backfill.
C.Compact backfill in 6-inch lifts thoroughly to prevent settling damage to grades or plant material.
Leave trenches slightly mounded to allow for settlement after backfilling is completed. Low areas
and damage caused by settling will be repaired by Contractor at no additional cost to the Project or
Owner.
D.Prevent soil, rocks, or debris from entering pipes or sleeves.
FLUSHING AND TESTING
A.Flushing: After piping, risers, and valves are in place and connected, but prior to installation of
sprinkler heads, thoroughly flush piping system under full head of water pressure from dead end
fittings. Maintain flushing for 5 minutes through furthermost valves. Cap risers after flushing.
INSPECTION
A.Arrange for Owner’s presence 48 hours in advance of inspection walk-through.
B.Examine areas and conditions under which work of this section is to be performed and ensure a
complete and operating installation prior to scheduling a walk-through.
C.Operate each zone in its entirety for Owner at time of walk-through and open all valve boxes as
directed.
D.Expose all drip emitters under operations for observation by Owner to demonstrate they are
performing and installed as designed prior to placing of mulch material. Schedule separate
walk-through as necessary.
E.As necessary Owner will generate a list of items to be corrected prior to Final Acceptance.
RESTORATION AND CLEANING
A.Flush dirt and debris from piping before installing sprinklers and other devices.
B.Adjust automatic control valves to provide flow rate of rated operating pressure required for each
sprinkler circuit.
C.Restore all damaged areas to original condition unless otherwise shown on plans at no additional
cost to the Project or Owner.
PART 2 - PRODUCTS
PIPE AND FITTINGS
A.Material: PVC
B.Pressure Pipe: Class 200.
C.Lateral Pipe: Class 200, Polyethylene for Northeastern Climate.
D.Fittings: Schedule 40, solvent welded or threaded.
E.Risers: Schedule 80, threaded.
F.Sleeves: Schedule 40, minimum 4”.
AUTOMATIC CONTROLLER
A.Irrigation controller specifications include but are not limited to:
1.The controller shall be of a hybrid type that is microelectronic circuitry capable of fully automatic
or manual operation.
2.All stations shall have the capability of independently obeying or ignoring the weather sensor as
well as using or not using the master valve.
3.The controller shall have the capability of shutting off the system on rainy days.
B.Control zone kit for drip zones with flows from 3 to 15 gpm (11.4 to 56.8 l/m), including control valve
(CV) and pressure-regulating filter (PRF).
1.Control Valve (CV) component specifications include:
a.Valve body and bonnet constructed of high impact, weather-resistant plastic, stainless steel
and other chemical/ultra-violet resistant materials.
b.One unit diaphragm constructed of durable Buna-N rubber with a clog resistant metering
orifice.
c.Inlet pressure rating of 15 to 150 psi (1.0 to 10.3 bar).
2.Pressure Regulating Filter (PRF) component specifications include:
a.Compact “Y” filter body and cap configuration constructed of glass-filled, ultra-violet
resistant polypropylene, with 150 psi (10.3 bar) operating pressure rating.
b.200 mesh (75 micron) filter screen constructed of stainless steel.
c.Normally-open pressure regulating device with preset outlet pressure of 40 psi (2.8 bar).
3.Regulated pressure of 40 psi (2.8 bar).
C.Low flow control zone kit for drip zones with flows from 0.2 to 5.0 gpm (0.8 to 18.9 l/m), including
Low Flow Valve (LFV) and Pressure-Regulating Filter (PRF).
1.Low flow valve (LFV) component specifications include:
a.Valve body and bonnet constructed of high impact, weather-resistant plastic, stainless steel
and other chemical/ultra-violet resistant materials.
b.One unit diaphragm constructed of durable Buna-N rubber material with a clog resistant
metering orifice.
c.Inlet pressure rating of 15 to 150 psi (1.0 to 10.3 bar).
2.Pressure regulating filter (PRF) component specifications include:
a.Compact “Y” filter body and cap configuration constructed of glass-filled, ultra-violet
resistant polypropylene, with 150 psi (10.3 bar) operating pressure rating.
b.200 mesh (75 micron) filter screen constructed of stainless steel.
c.Normally-open pressure regulating device with preset outlet pressure of 30 psi (2.1 bar).
3.Regulated pressure of 30 psi (2.1 bar).
POP-UP SPRINKLERS
A.Irrigation spray body for small turf areas (2.5-24 feet (0.8-7.3m) with a 30 psi (2.0 bar) pressure
regulating device specifications include but are not limited to:
1.Parts and components to withstand harsh operating conditions using chemically treated
recycled water (reclaimed/non-potable), dirty water containing grit, debris, and other
particulates, high operating pressures common in commercial irrigation and resistant to
ultra-violet light.
2.Pressure-activated, co-molded soft elastomer wiper seal composed of three wipers and a base
seal to ensure a positive seal without excess “flow-by” which enables more heads to be
installed on the same valve.
3.Recessed debris pockets located in the base of the spray body to prevent recirculation of
harmful debris during operation.
4.Shall include a check valve to prevent low head drainage of up to 14 feet (4.3 m); 6 psi (0.4
bar).
5.Shall include technology built into the stem to prevent water loss and alert maintenance when a
spray nozzle is removed.
6.Flow by rating of 0 at 15 psi (1.0 bar) or greater, 0.5 gpm (0.1 m3/h; 0.03 l/s) otherwise.
7.Shall include ½” (15/21) NPT female threaded bottom inlet.
8.The spray body, stem, nozzle, and screen shall be constructed of heavy-duty and ultra-violet
resistant plastic.
B.Irrigation spray body for small turf areas (2.5-24 feet (0.8-7.3m) with a 45 psi (3.1 bar) pressure
regulating device specifications include but are not limited to:
1.Parts and components to withstand harsh operating conditions using chemically treated
recycled water (reclaimed/non-potable), dirty water containing grit, debris, and other
particulates, high operating pressures common in commercial irrigation and resistant to
ultra-violet light.
2.Pressure-activated, co-molded soft elastomer wiper seal composed of three wipers and a base
seal to ensure a positive seal without excess “flow-by” which enables more heads to be
installed on the same valve.
3.Recessed debris pockets located in the base of the spray body to prevent recirculation of
harmful debris during operation.
4.Shall include a check valve to prevent low head drainage of up to 14 feet (4.3 m); 6 psi (0.4
bar).
5.Shall include technology built into the stem to prevent water loss and alert maintenance when a
spray nozzle is removed.
6.Flow by rating of 0 at 15 psi (1.0 bar) or greater, 0.5 gpm (0.1 m3/h; 0.03 l/s) otherwise.
7.Shall include ½” (15/21) NPT female threaded bottom inlet.
8.The spray body, stem, nozzle, and screen shall be constructed of heavy-duty and ultra-violet
resistant plastic.
SPRAY NOZZLES
A.Fixed or variable arc matched precipitation rate spray nozzle for small turf areas (3-15 feet (.91-4.6
m), maximum 30 psi (2.1 bar) specifications include but are not limited to:
1.Shall be constructed of ultra-violet resistant plastic.
2.Shall contain a stainless steel flow and radius adjustment screw allowing up to 25% radius
reduction.
3.Nozzle shall have a precipitation rate that is matched across sets and patterns of spray nozzles
up to 15 feet (4.6 m).
4.Shall include color coding marking on top of nozzle for easy identification of spray radius.
B.Dual orifice fixed arc nozzle for small turf areas (5-15 feet (1.7-4.6 m), maximum 30 psi (2.1 bar)
specifications include but are not limited to:
1.Shall be constructed of ultra-violet resistant plastic.
2.Shall contain a stainless steel flow and radius adjustment screw allowing up to 25% radius
reduction.
3.The nozzle shall have dual orifices for both in-close watering and standard pattern watering
with a matched precipitation rate between sets and matched flow and with other matched
precipitation rate fixed spray nozzles up to 15 feet (4.6 m).
4.Shall include color coding marking on top of nozzle for easy identification of spray radius.
C.Multi stream rotating nozzle for small turf areas (8-24 feet (2.4-7.4m), maximum 55 psi (3.8 bar)
specifications include but are not limited to:
1.Shall be constructed of ultra-violet resistant plastic.
2.Shall contain a stainless steel radius adjustment screw allowing reduction to 13 feet (4.0 m).
3.Shall have a matched precipitation rate of 0.60 in/hr (15.2 mm/hr).
4.Shall have a color coded radius reduction plug to allow for easy identification of fixed arc
pattern.