01120.10 1011 PART 01100 - WATER SUPPLY SYSTEMS Description
01120.00 Scope - This Work consists of installing irrigation systems and associated Equipment at
locations shown or specified and as directed.
01120.01 Qualifications - In order to install certain kinds of Equipment or systems, manufacturer's
certifications may be required, if described in the Special Provisions. Materials
01120.10 General - Furnish only commercial quality M aterials and Equipment . All items propos ed
for use will be subject to testing to ensure compliance with the Specifications. Provide Materials of the same function that are of the same type and the same manufacturer. Submit a list of proposed materials for approval as soon as practicable after Award and before arranging for procurement of any materials, especially those materials or products not shown or specified. If any initially proposed materials are not approved, submit substitutes for approval. Any materials installed without approval wi ll be subject to removal and replacement with acceptable material at no additional cost to the Agency. Materials may be designated by trade name or by manufacturer's catalogue information as shown or specified. The use of a substitute material may be all owed if a written request for substitution and proof of equivalent quality and suitability are furnished. Make any request for substitution with ample time for approval without delaying the Work . When alternate Equipment , such as sprinkler heads, is proposed for use with hydraulic characteristics differing from that originally shown, the following will be required: • A redrafted, legible plan that shows the redesigned layout, location, or sizes of every affected system element as required for proper operat ion as originally designed. Furnish a plan showing every relevant system element, site feature, and plan element that was shown on the original plan. A plan made by marking up the original plan will not be accepted. • A hydraulic calculation table for the alternate Equipment . At a minimum, show a complete calculation for one average sprinkler zone (section) and a complete calculation for the "worst case" sprinkler zone (i.e., the section that is farthest from the point of connection (P.O.C.), is the larges t, or otherwise presents the most challenging hydraulics). Starting from the P.O.C., show the calculation with a step-down method with flow and loss at each piece of Equipment and length of pipe run between Equipment . Show the new total water required for each zone and the total for all zones to ensure that maximums for meter size, pipe sizes, and watering times will not be exceeded. • Where any controller run-time change will be required, submit a separate page showing the total timing per controller required for each section, to show that timing changes will still allow all zones to be run within a reasonable time period. • A cost page showing the Contractor's actual discount cost from the Supplier s, comparing the original plan costs versus t he proposed Equipment costs for each type of item, such as pipe by size, where there is a change required. Show the line total of each type of item and the grand total for the proposed change. 01120.11 1012 01120.11 Pipe, Tubing, and Fittings - Furnish galvanized iron or steel, PVC, or polyethylene pipe as shown or specified that meets the following requirements:
a.Galvanized Pipe and Fittings - Furnish pipe of standard weight, hot -dip galvanized iron or steel, stan dard threaded, coupled, and that meets the requirements of ASTM A53. Non-standard threaded fittings will be rejected.
b.Polyvinyl Chloride Pipe and Fittings - Furnish PVC pipe and fittings of PVC compound Type 1, Grade 1, conforming to ASTM D2241 and certified approved by the National Sanitation Foundation. Provide pipe and fittings free from defects caused by poor materials, low quality of Work , or rough handling. Dimensional and quick burst tests of pipe and fittings may be required after arrival at the Project Site before materials will be accepted. Furnish pipe and fittings as follows: Used for Class or Schedule Main and lateral lines ......................................... Class 200 or Schedule 40 PVC Irrigation sleeves ..................................................................... Schedule 40 PVC Caps ........................................................................................ Schedule 80 PVC Direct bury pipe, not in sleeves, placed under road beds or other paved areas ............................................. Schedule 40 PVC Unless otherwise specified, furnish entire Project with one pipe class or schedule type. Furnish PVC threaded pipe of PVC 1120, schedule 80 material conforming to ASTM D1785. Provide PVC solvent -weld pipe of PVC 1120 materials having a 200 psi minimum pressure rating with SDR 21 walls that conform to ASTM D2241. Furnish PVC pipe fittings conforming to ASTM D2466, Type I, Grades 1 or 2. Pipe may be belled on one end with the dimensions of the tapered bell conforming to ASTM D2672. Install PVC pipe with walls heavier than SDR 21 when shown or specified.
c.Non -Potable Colored Coded Pipe - Wherever non-potable, reclaimed or reuse water is used, furnish PVC pipe that is tinted purple and imprinted with the warning "Caution: Reclaimed Water - Do Not Drink". Provide pipe meeting the same AWWA and ASTM specifications as the potable water pipe sizes on which they are based.
d.Polyethylene Pipe - Furnish polyethylene pipe of Cl ass 80, SDR 15, medium density, meeting the requirements of ASTM D2239, conforming to U.S. Commercial Standard CS -255, and approved by the National Sanitation Foundation (NSF).
1.Micro Tubing and Fittings - Where drip emitters are not required, furnish a blank type and provide any connections necessary. Provide tubing consisting of nominal -sized linear, low-density, minimum 1/4 inch outside diameter (OD) polyethylene.
2.Low Volume (Drip) Tubing - Furnish drip tubing manufactured fr om specially formulated, chemical -resistant, low to medium density, virgin polyethylene or polybutylene which is selected for excellent weatherability and stress cracking resistance, and is designed specifically for use in drip irrigation systems. Provide drip tubing having a minimum wall thickness of 0.044 inch. 01120.13 1013 01120.12 Automatic Controllers - Provide Underwriter's Laboratories (UL) approved controllers as shown or specified. Furnish each outdoor controller with either a pedestal or wall mount brackets when appropriate. Provide and install the controller in a weatherproof and vandal -proof cabinet of corrosion -resistant metal. Furnish the controller housing or cabinet with hasp and lock or locking device. Provide locks or locking devices that are ma ster-keyed and include three sets of keys for the locks. If the irrigation system serves both lawns and planting beds, furnish a controller that has a dual programming capability. Provide controllers that are compatible with and capable of operating the irrigation system as constructed. The following are definitions of some controller -associated Equipment : Central Controller - A computer system programmable to receive data from and provide commands to multiple irrigation systems remotely located from th e central system location. Flow Sensor - The hardware located in a pipeline that senses water flow and sends resulting data by electronic pulses to the Pulse Output Transmitter. Pulse Decoder - A microprocessor -based device designed to read electrical pulses originating at the Flow Sensor (or other type of monitoring device) and send the data to a central control system for analysis and action. When reading water flow data, the Pulse Decoder may also be referred to as a flow monitor. Pulse Output Transmitter - A device that reads electronic pulses from the F low Sensor and sends data to the pulse- decoding device. Rain Sensor - A sensor able to interrupt the power from the irrigation controller to the valves when the rainfall exceeds a pre-selected amount. Furnish Rain Sensors that are compatible with the system controller and are fully adjustable. Satellite Controller - A Satellite Controller similar to a normal stand-alone controller and able to operate as one, but designed to be operated by a C entral Controller located off -site. Soil Moisture Sensor - A sensor that interrupts programmed irrigation cycles until the Soil moisture reaches a predetermined condition at the sensor's probe location. Weather Station - A field station that collects and stores various weather data for access and use by a central control system in modifying an irrigation program for weather conditions. Typical data collected over a time period are wind speed, wind direction, relative humidity, rainfall, solar radiation and air temperature.
01120.13 Quick -Coupling Equipment - Furnish quick coupling Equipment with a body of cast
leaded semi -red brass alloy No. C84400 conforming to ASTM B584, and a service rating not less than 125 psi for non -shock cold water. Provide couplers having standard male pipe threads at the top and standard female pipe threads at the base. Ensure that the valve is designed to open only upon inserting a coupler key and close completely after removing the key, with absolutely no leakage of water between the coupler and valve body. Provide valve bodies to receive couplers that are designed with double worm slots to allow smooth opening and closing action with a minimum of effort. Ensure that slots notched at the base will hold the coupler firmly in t he open position. Furnish couplers of one piece construction with steel reinforced side handles attached, a locking top and of the same material as the valve body. The coupler shall have stainless steel double guide lugs to fit the worm slots. Furnish t wo couplers and two hose swivels for operation of the valves, and two keys for the locking caps if quick -coupling valves are required. For non-potable water systems, furnish a color -coded, purple tinted cap that bears the printed warning "Caution: Reclai med Water - Do Not Drink". 01120.14 1014 01120.14 Hose Bibs - Furnish bronze or brass hose bibs, with angle- type thread to accommodate a 3/4 inch hose connection, and with a key - operated design that prevents operation by wrench or pliers.
01120.15 Cross -Connection Control Devices - Cross -connection control devices will be shown.
Furnish and install cross -connection control devices meeting the requirements of the Oregon Health Division and the local water authority.
01120.16 Water Meter - Water meter procurement, installation, and associated costs will be the
responsibility of the Agency. Be responsible for coordinating water meter needs in a timely fashion with the Agency.
01120.17 Valves:
a.Gate Valves - Furnish gate valves of heavy -duty bronze conforming to the requirements of ASTM B62. Provide valves of the same size as the pipes on which they are placed and install with union or flange connections. Service rating (for non-shock cold water) shall be 150 psi. Valve s shall be of the double disk, taper seat type, with rising stem, union bonnet and hand wheel or suitable cross wheel for standard key operation. The valves shall have the manufacturer's name, type of valve, and size clearly cast on them.
b.Drain Valv es - Furnish bronze or brass drain valves, 1 inch or 3/4 inch in size, manual angle globe type, with rising stem, hex brass union, removable bonnet and stem, and adjustable packing gland. Ensure that valves are designed for underground installation with a suitable cross wheel operable with a standard key. The valves shall have a service rating of not less than 150 psi non-shock cold water. Furnish three standard operating keys.
c.Check Valves - Furnish heavy duty bronze or steel check valves which function by means of a hinged disc suspended from the body, and which is able to close of its own weight. Furnish valves that are of the same size as the pipes on which they are placed, unless otherwise specified, and with union or flanged connections. Provide valves that are rated for non-shock cold water service of not less than 150 psi. The valves shall have the manufacturer's name, valve type, and size cast on them.
d.Pressure-Reducing Valves - Furnish pressure-reducing valves with a minimum of 150 psi working pressure and an adjustable outlet range of 20 psi to 70 psi, rated for non-shock cold water service up to 175 psi. The valves shall be factory set as shown or specified.
e.Isolation Valve - Furnish isolation valves as shown or as specified. If no isolation valves are shown, furnish ball valves as indicated below.
f.Ball Valves - Furnish bronzed-bodied ball valves conforming to ASTM B62 and with a hard, chrome plated ball conforming to ASTM B124. The valve shall be non-shock cold water service-rated at not less than 400 psi. Plastic valves will not be accepted.
g.Air Relief Valve - The air relief valve automatically relieves air pressure to break an air vacuum in the pipe section where it is located. Install air relief valves at the exact high point of each pipe section where relief is needed. (Note: air relief valves are not associated with backflow prevention).
h.Control Valves:
1.Manual Control Valves - Furnish manual valves of bronze or brass, angle type, with hex brass union, and with a service rating not less than 150 psi non-shock cold water. Provide valves for underground installation designed with a cross wheel suitable for operation with a standard 01120.21 key. Furnish three suitable operating keys per irrigation system. Furnish valves that have removable bonnet and stem assembly, with adjustable packing gland housing for the long acme-threaded stem to ensure full opening and closing. Provide valves with discs that are full floating with replaceable seat washers.
2.Automatic Control Valves - Furnish automatic control valves of a normally closed design, operated by an electric solenoid of the required rating, but not more than 6.5 W and operating on 24 V AC power. Ensure that solenoids directly attached to the valve bonnets or bodies have completely internal control parts. Provide bodies that are not less than 150 psi if brass or bronze and not less than 125 psi if plastic, with a manual control bleed cock to operate the valve without electric current. Ensure that the closing speed is not less than 5 seconds and the opening speed is not less than 3 seconds. Both shall be at a constant rate of opening and closing so the water flow is completely stopped when the valve is either manually or electrically closed. Provide valves having manual shutoff stems with cross handles that will adjust the valve from fully closed to wide open with the valve automatically operable in the adjusted position.
3.Automatic Control Valves with Pressure Regulator - Furnish valves of the same manufacture as the automatic control valves, capable of reducing the inlet pressure to a constant lower pressure regardless of supply fluctuations, and which are fully adjustable.
01120.18 Valve Boxes and Protective Sleeves - Provide automatic control valves, flow control
valves, pressure reducing valves, backflow preventers, filters and other serviceable fixtures with valve boxes that are extendable to obtain the depth required. Furnish boxes constructed of thermoplastic, with locking lids, green in color, and of the type shown or specified. Include a protective sleeve and cap with all manual drain valves and manual control valves.
01120.19 Electrical Wire and Splices - Unless otherwise specified, furnish electrical wiring used as
a hot wire for each zone between the automatic controller and automatic valves of copper, minimum size AWG No. 14, and red in color. Furnish common wire that is a minimum AWG No.12 and white in color. Furnish type USE that is chemically cross-linked polyethylene or thermoplastic. Furnish Type UF that is color-coded or marked with number identification. Make low voltage splices with one of the following: • A waterproof sealed wire connector system that is sealed from moisture, securely joins two or more conductors both mechanically and electrically, is rated for direct burial according to the manufacturer's recommendations, and conforms to UL 486D for direct burial applications. Wrapping a splice in tape is not an acceptable method of waterproofing. Obtain approval of the sealed wire connector system from the Engineer before installation. • Heat-shrinkable insulating tubing manufactured for use in irrigation electrical systems. Furnish heat-shrink tubing of a mastic-lined, heavy-wall, polyolefin cable sleeve. Provide and install an extra wire with all wiring runs that is the same gauge, but of a different color than the hot wire and common wire. The extra wire will be reserved for future use or modifications to the system.
01120.20 Communication Cable - Furnish communication wire in central satellite control systems
that is 18 gauge polyethylene (PE) 89, minimum 6 pair, or approved equal. Provide sufficient pairs to connect all decoding, sensing and monitoring devices to the Central Control Unit.
01120.21 Detectable Wire and Marking Tape - Provide a detectable wire using continuous
No. 14 gauge, single strand locator wire that is blue in color. Provide marking tape consisting of inert polyethylene plastic that is impervious to all known alkalis, acids, chemical reagents, and solvents likely to be encountered in the Soil. Furnish color-coded tape with the type of line buried below and 01120.40 the word "Caution" imprinted continuously over its entire length in permanent black ink. Provide tape of the width recommended by the manufacturer for the depth of installation used. Construction
01120.40 General - The irrigation Plans are a schematic design and may require adjustment. Do not
install the sprinkler system as shown if it is evident that obstructions, grade differences, or differences in area dimensions create conditions different than anticipated in the design. Bring all such obstructions or differences to the attention of the Engineer. In the event this notification is not performed before construction begins on a part of the system where discrepancies exist, any revisions necessary to make the system operate as designed will be the Contractor's responsibility.
a.Plumbing - Install all parts of the irrigation system according to the Oregon Plumbing Code and State and local laws. Make water service connections as shown and specified. Conform to the requirements of the jurisdictional water authority. Ensure that water velocities in PVC pipe do not exceed 5 feet per second, unless approved in writing by the Agency. Bring any velocities exceeding 5 feet per second created by pipe sizes shown to the attention of the Agency before beginning construction. Correct excess velocities existing after construction, or caused by changes from the Plans, at no additional cost to the Agency, unless a written agreement has been made authorizing otherwise.
1.Double Check Valve Assembly - Install, inspect, and test the double check valve assembly (DCVA) according to applicable regulations of the Oregon Health Division and the local water authority. Furnish test records on forms approved by the Oregon Health Division. Furnish forms filled out by a State-licensed Backflow Device Tester documenting that the DCVA is in good operating condition before any flushing and testing of downstream water lines. During the life of the Contract, test the DCVA annually, or more often if successive inspections indicate repeated failure. Repair or replace the DCVA whenever it is found to be defective.
2.Reduced-Pressure Backflow Device - Install, inspect, and test the reduced-pressure backflow device (RPBD) according to the applicable portions of the Oregon Plumbing Code and applicable regulations of the Oregon Health Division and the local water authority. Apply the same specific testing requirements as stated for the DCVA above.
b.Electrical Service - Install electrical service according to 00960.49, the National Electrical Code, and all State and local laws. Power sources will be as shown or as directed. Be responsible for coordination and installation of electrical service. Furnish and install meter bases at the power source conforming to the requirements of the power supplier. Give the power supplier's representative notice before making any installation. Provide a separate, dedicated circuit for the controller.
01120.41 Layout of Irrigation System - Stake the irrigation system, following the schematic design
on the Plans, before construction begins. With prior approval, make alterations and changes in the layout to conform to ground conditions and to obtain adequate coverage of water. Comply with the requirements of 00150.50.
01120.42 Excavation - Excavate trenches no wider than necessary to lay the pipe or install the
Equipment. Keep the top 6 inches of Topsoil, if applicable, separate from subsoil and replace this Topsoil as the top layer when backfilling. Provide smooth trench bottoms of Sand or other material, free from Rocks and Unsuitable Material. Excavate trenches in Rock or other Unsuitable Material at least 6 inches below the required depth and backfill with Sand or other suitable material free from Rocks. Exercise care when excavating near existing trees. Where roots are 2 inches and greater in diameter, except in the direct path of the pipe, hand excavate and tunnel the pipe trench. When large roots are 01120.44 exposed, wrap them with heavy burlap for protection and to prevent excessive drying. When digging trenches by machine adjacent to trees having roots 2 inches and less in diameter, hand trim the sides of the trench, making a clean cut of the roots. Treat all cut and trimmed roots 1/2 inch or larger in diameter with an approved tree wound dressing. Backfill trenches having exposed tree roots within 24 hours unless protected by continuously moist burlap or canvas. Place detectable marking tape and tracer wire in the trench directly above, parallel to, and along the entire length of all nonmetallic water pipes and all nonmetallic and aluminum conduits installed under existing or planned Pavement. Use tape widths recommended by the manufacturer for the burial depth. Pipe installation using a "pipe puller" may be approved if there is adequate Topsoil depth and the Topsoil is free of Rock. Obtain the Engineer's approval before using a pipe puller. Include any resultant changes in material or design with the request for use of this method. If unforeseen bedrock is encountered during excavation that prevents the pipe from being buried at the specified depth, immediately bring it to the attention of the Engineer.
01120.43 Piping - Backfill all pipe between the top of the pipe and finished grade with a minimum
of 18 inches of fill according to 01120.49. Where possible, place mains and laterals or section piping in the same trench. Separate all pipes by at least 2 inches. Place all pipelines a minimum of 3 feet from the edge of concrete sidewalks, curbs, guardrail, fences, traffic barriers or walls unless otherwise approved. Place marking tape and tracer wire above all pressurized mainline, according to the manufacturer's instructions. Place all live mains to be constructed under existing Pavement in sleeves jacked under the Pavement, unless otherwise shown. Place all PVC pipe installed under Pavement in pipe sleeves of Schedule 40 PVC, unless steel sleeving is shown or specified. Furnish pipe caps of Schedule 80 PVC. Install sleeves 2 feet below Subgrade when passing under Roadways. Extend sleeves 2 feet beyond the edge of Gravel, edge of sidewalk or back of curbs. Mark sleeves with a 2 feet piece of No. 4 rebar driven flush with the ground or other adjacent surface. Place PVC caps over both ends of sleeves but do not glue. Solvent-weld sleeve sections. Pipe bedding and backfill shall conform to Section 00405. Extend the sleeve a minimum of 12 inches beyond the edge of Pavement. Perform all jacking operations according to an approved jacking plan. If obstacles are encountered during required jacking, notify the Engineer, who may authorize corrective measures according to 00140.60. Provide for complete drainage of all pipelines with manual drain valves installed at section low points. Drain valves may not be shown.
01120.44 Pipe Jointing:
a.General - During construction, plug or cap pipe ends to prevent entry of dirt, Rocks and other debris.
b.Galvanized Steel Pipe - Ensure that galvanized steel pipe has clean cut, well fitted standard pipe threads. Ream all pipe to its full diameter and remove burrs before assembly. Construct threaded joints using either a non-hardening, non-seizing multipurpose sealant, PTFE tape, or paste as recommended by the pipe manufacturer. Make all threaded joints tight with wrenches, without using handle extensions. Clean and remake joints that leak with new Material. Use of caulking or thread cement to make joints tight is not allowed.
c.PVC Pipe - Handle and install PVC pipe, couplings and fittings according to the manufacturer's recommendations. Chamfer the outside of the PVC pipe to a minimum of 1/16 inch at approximately 22 degrees. Join pipe and fittings by solvent welding. Use only solvents that 01120.45 penetrate the surface of both pipe and fitting with a result of complete fusion at the joint. Use solvent and cement only as recommended by the pipe manufacturer. On plastic to metal connections, work the metal connection first. Use a non-hardening compound on threaded connections. Thread connections between metal and plastic using only female threaded PVC adapters with threaded Schedule 80 PVC nipples.
d.Polyethylene Pipe - Install polyethylene pipe and fittings according to the manufacturer's recommendations. Cut the ends of the polyethylene pipe square and insert the fitting to its full depth. Use stainless steel clamps for insert fittings.
01120.45 Installation:
a.Sprinkler Heads - Position turf heads and other pop-up heads between 1/2 inch and 1 inch above finish grade, measured from the top of the sprinkler. Place sprinklers as close as practicable to walks, curbs, Pavement and lawn edges, but leave enough space to allow height adjustment. Do not place heads on risers in areas with any potential for pedestrian traffic, unless otherwise shown. Use swing riser assemblies that allow positioning for correct sprinkler height.
b.Drip Emitters - Install emitters directly above the root mass of the plant being watered, according to the Plans or the manufacturer's recommendations.
c.Low Volume Drip Tubing - Install drip irrigation tubing as shown and the manufacturer's recommendations.
d.Controllers - Install controllers according to the manufacturer's recommendations and as shown. Receive approval of the location before installing. Since the controller will need to be accessed frequently, install it at a height, position, and location that allow ease of access.
e.Valve Boxes and Quick Couplers - Position the tops of valve boxes, capped sleeves, and quick coupler valves between 1/2 inch and 1 inch above finish grade or mulch.
f.Valves - Install valves so that access for maintenance is maintained.
g.Central Control Equipment - If shown or specified, install the following Equipment according to the manufacturer's recommendations: • Rain Sensors • Soil Moisture Sensors • Flow meters • Central control system with Satellite Controllers • Weather Stations
01120.46 Low Voltage Electrical Installation - Use direct burial wiring between the automatic
controller and automatic valves. Install waterproof splices according to the manufacturer's recommendations. The wiring may share a common neutral. When more than one automatic controller is required, provide a separate common neutral for each controller and the automatic valves it controls. Run separate control conductors from the automatic controller to each valve. Provide and install an extra wire according to 01120.40. Install wire adjacent to or beneath the irrigation pipe. Use plastic tape or nylon tie-wraps to bundle wires together at 10 foot intervals. Snake the wire from side to side in the trench to provide slack in the wire run. When it is necessary to run wire separate from the irrigation pipe, bundle and place the wire under detectable marking tape. Splices will be allowed only at junction boxes, valve boxes, pole 01120.49 bases, or control Equipment. Leave a minimum of 2 feet of excess conductor at all splices, terminals and control valves to facilitate inspection and future splicing.
01120.47 Flushing and Testing:
a.General - Provide gauges used in the testing of water pressures that are certified correct by an independent testing laboratory immediately before use on the Project. Retest gauges when directed. Test automatic controllers by actual operation for a period of 2 weeks under normal operating conditions. If adjustments are required, adjust according to the manufacturer's direction and test until operation is accepted as satisfactory.
b.Sprinkler Head Flushing - Flush all sprinkler heads as recommended by the manufacturer.
c.Sprinkler Head Testing - Test for leaks in heads and connections and correct as required.
d.Main Line Flushing - To remove debris that may have entered the line during construction, flush main supply lines twice with the supply valve fully open. Flush first before placing valves and again after placing valves and before pressure testing.
e.Main Line Testing - Purge all main supply lines of air and test with static water pressure of at least 150 psi for 60 minutes without introduction of additional service or pumping pressure. Test with one pressure gauge installed on the line where directed. Install an additional pressure gauge at the pump when directed. Lines showing loss of pressure exceeding 5 psi at the end of the specified test period will be rejected. Correct rejected installations and retest for leaks.
f.Lateral Line Flushing - Flush all lateral lines once with the supply valve fully open prior to placement of sprinkler heads, emitters and drain valves. Flush long enough to remove any debris that enters the lateral lines during construction.
g.Lateral Line Testing - Purge all lateral lines of air and test under operating line pressures with risers capped and drain valves closed. Maintain operating line pressures for 30 minutes through open valves and pressure regulating devices. Lines showing leaks when visually inspected at the end of the specified test periods will be rejected. Correct and retest lateral line installations that have been rejected.
h.Lateral Line Alternate Test Method - When conditions prevent effective visual inspection of lateral lines, the Engineer may require that the lines be tested by use of pressure gauges. In that event, maintain the static water pressure equal to the operating line pressure in the lines for 30 minutes, with valves closed and without introduction of additional service pressure. Lateral lines showing loss of pressure exceeding 5 psi at the end of the specified test period will be rejected. Correct and retest lateral line installations that have been rejected.
i.Testing of Micro Tubing - Micro tubing will be tested by visual inspection while operating and before burial. Tubing that has obvious leaks or that doesn't operate as designed will be rejected. To fully test micro tubing, a water collection procedure recommended by the manufacturer may be required. Correct all faults before retesting.
01120.48 Adjusting System - Before final inspection, adjust and balance all sprinklers to provide
adequate and uniform coverage. Balance spray patterns by adjusting individual sprinkler heads with the adjustment screws or by replacing nozzles to produce a uniform pattern. Unless otherwise specified, water spray is not allowed on Pavement, walks or Structures.
01120.49 Backfill - Do not start backfill until all piping has been inspected, tested and approved.
Complete backfilling as soon as possible after approval. Ensure that backfill Material placed within 6 inches of the pipe is free of Rocks or other Unsuitable Material that might cut or otherwise 01120.60 damage the pipe. Backfill from the bottom of the trench to approximately 6 inches above the pipe with continuous compaction in a manner that will not damage the pipe or wiring, and proceed evenly on both sides of the pipe. Thoroughly compact the remainder of the backfill without using heavy Equipment within 18 inches of any pipe. Ensure that the top 6 inches of the backfill is Topsoil Material or, if suitable, is the first 6 inches of Material removed in the excavation. Pipe bedding Material conforming to 00405.12 may be authorized in quantities determined by the Engineer. When authorized to proceed, fill the bottom 2 inches of the trench with approved bedding before laying pipe. After the pipe is in position, add enough bedding Material to bring the backfill height to 2 inches above the pipe. Continue backfilling as usual. If sufficient suitable backfill Material is not available from trench excavation or other sources on the Project, notify the Engineer. Provide an estimate of imported backfill required, if possible. Unless otherwise shown or specified, imported pipe bedding Material will be authorized according to 00140.60. Maintenance
01120.60 System Operation - Repair, flush and test all main and lateral lines that sustain a break or
disruption of service. Upon restoration of the water service, bring the affected lines up to operating pressure. After pressurizing, conduct a thorough inspection of all sprinkler heads, emitters, and other fittings, located downstream of the break or disruption of service, and repair. This inspection is required to ensure that the entire irrigation system is operating properly. Completely install and test the irrigation system, and make it automatically operable before planting in a unit area except where otherwise shown, specified, or approved. Be fully responsible for all maintenance, repair, testing, inspection and automatic operation of the entire system until Final Acceptance. (See 00150.95.) This responsibility includes, but is not limited to, draining the system before winter and reactivating the system in the spring and at other times as directed. Be responsible for having annual inspections and tests performed on all cross connection control devices as required by the State Health Division until Final Acceptance. (See 00150.95.) In the spring, when the drip irrigation system is in full operation, make a full inspection of all emitters. This involves visual inspection of each emitter under operating conditions. Make all adjustments, flushing or replacements to the system at this time to ensure the proper operation of all emitters. Finishing and Cleaning Up
01120.70 As-Built Plans and System Orientation - Upon completion of the Work, submit corrected
Working Drawings, schematic circuit diagrams, or other drawings necessary for the Engineer to prepare corrected Plans showing the Work as constructed. Provide drawings on 8 1/2 inches by 11 inches, 11 inches by 17 inches, or 22 inches by 36 inches sizes. Prepare and present a training and orientation session covering the operation, adjustment and maintenance of the irrigation system. Review corrected drawings and explain all features. Show locations of drain valves, if any, on the drawings. At this session, provide the Engineer with parts lists and service manuals for all Equipment. Notify the Engineer in writing not less than 2 weeks before the proposed date of the training and orientation session. The date and time of the session will be mutually agreed to.
01120.75 Drip Line Tubing Manufacturer Warranty - Furnish a manufacturer warranty that
unconditionally warrants to the Agency the drip line tubing products and installation under this Section against failure of drip line tubing, according to this Subsection and 00170.85(c)(1). 01120.90 "Unconditionally warrant" means that the warranty covers all failures, regardless of the source or cause of the failure, including, without limitation, whether the source or cause is or may be related to workmanship, inspection, or choice of Materials. The Agency inspection of any portion of the Work during the Contract and during the product installation, the Agency acceptance of the Work, corrections under the warranty, or expiration of the warranty shall not relieve the obligations under this warranty.
a.Warranty Period - The warranty period shall be for 5 years.
b.Failure - For purposes of the warranty, failure is defined as any one or more of the following: Manufacturing defects Rot Electrolytic corrosion Stress cracking
c.Remedy - Upon notification by the Engineer of a failure as defined above, provide the following remedy at no additional cost to the Agency: Repair failures within 60 Calendar Days. Use Materials and procedures meeting the Specifications. Match repairs to finished grade. Coordinate timing of repair Work with the Engineer.
d.Agency's Right to Make Repairs - If, in the opinion of the Engineer, a failure causes or may cause a hazard, the failure may be temporarily corrected by Agency or other forces at no additional cost to the Agency. Replace temporary repairs with permanent repairs at no additional cost to the Agency and according to the Specifications and within the time specified in 01120.75(c). Measurement
01120.80 Measurement - No measurement of quantities will be made for Work performed under this
Section. Payment
01120.90 Payment - The accepted quantities of Work performed under this Section will be paid for
at the Contract lump sum amount for the item "Irrigation System". Payment will be payment in full for furnishing and placing all Materials, and for furnishing all Equipment, labor, and Incidentals necessary to complete the Work as specified. No separate or additional payment will be made for excavation, backfill, electrical service, or system orientation. 01140.00
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Source: Oregon Standard Specifications for Construction, 2024 Edition. Pages 1077–1087 of 1,268. View official source ↗