Division 1 - Materials of Construction
1. General
All materials shall be new and undamaged. Unless otherwise approved by the District, the same manufacturer of each item shall be used throughout the work.
2. Ductile and Cast Iron Fittings
- Mechanical Joint and Flanged x Mechanical Joint Fittings
- Fittings shall be ductile iron, compact fittings, and pressure rated for 350 psi working pressure in accordance with AWWA C153. Joint dimensions and metal thickness shall meet the requirements of ANSI A21.10, A21.11, and A21.15.
- Bituminous coating and cement lining shall be standard thickness in accordance with AWWA C104.
- Rubber gaskets for mechanical joints (M.J.) shall be in accordance with AWWA C111.
- Payment for mechanical joint fittings shall be made on the basis of AWWA published weights for ductile iron compact fittings, not including weights of accessories or bituminous lining.
- The Installer shall furnish certification from the manufacturer of the fittings and gaskets being supplied, that the inspections of all the specified tests have been made, and the results thereof comply with the requirements of this standard.
- Flanged Fittings
- Fittings shall be cast iron short-body with Class 125 flanges in accordance with AWWA C107.
- Bituminous coating and cement lining shall be standard thickness in accordance with AWWA C104.
- Gaskets for flanges shall be 1/8-inch SBR or neoprene rubber, meeting all requirements of AWWA C111.
- The Installer shall furnish certification from the manufacturer of the fittings and gaskets being supplied that the inspections of all the specified tests have been made and the results thereof comply with the requirements of this standard.
3. Fire Hydrants
Fire hydrants shall be a compression-type hydrant with a minimum of 5 ¼ -inch main valve opening, for a 42-inch trench with a 6-inch mechanical-joint connection, two 2 ½ - inch hose connections (NST), 4-inch pumped connection (NST), and ¾ -inch Pentagon operating nut. Hydrant shall close with water pressure and be of traffic type with designed replaceable break points. Hydrant shall allow full 360° rotation by loosening flange bolts and turning nozzle screw. Hydrant shall be Mueller Centurion ®, or approved equal, in accordance with AWWA C502. Hydrant shall be painted Parker Equipment Enamel "Equipment Yellow."A 4-inch (FNST) x 5-inch Storz Coupling shall be installed on all fire hydrants.
4. Gate Valves
Gate valves shall be resilient wedge type, non-rising stem, 2-inch operating nut, bronze-mounted for 200 psi working pressure per AWWA C509 unless other pressure is specified. The gate valve shall be Mueller "Resilient Seat" gate valve or approved equal.
5. Valve Boxes
Valve boxes shall be cast iron, two-piece, rated for H-20 traffic loading and equal to Olympic Foundry Inc. #950, with a 6-inch diameter sewer casing cut to length.
6. Valve Marker Posts
Valve marker posts shall be reinforced concrete posts, 5 x 4 inches on 1 end and 6 x 6 inches on the other end, 42 inches long. Valve marker posts shall be set at all valves or valve clusters, except hydrant valves. Valve marker posts shall be Fog-Tite Meter Seal Co. valve marker or approved equal.
7. Water Mains - Polyvinyl Chloride (PVC)
The pipe shall be manufactured to cast iron size (C.I.) outside dimensions with DRs and tolerances in compliance with AWWA Standard C900-75, PVC Pressure Pipe, 4 inches to 12 inches For Water. The pipe shall be approved by Factory Mutual (FM) and the Underwriter's Laboratories (U/L) for use in underground fire protection service. Laying length shall be 20 feet for all sizes, except that up to 15% of the footage may be in random lengths of not less than 10 feet.
The pipe shall have an integral bell end, and the gasket seal shall be reinforced with a steel band or other rigid material. The joint shall be in compliance with the requirements of ASTM D-3139, "Joints for Plastic Pressure Pipes Using Flexible Elastomeric Seals."
The pipe marking shall include:
- Nominal size and O.D. base (e.g., 8-inch C.I.).
- Material code designation (PVC 1120).
- Dimension ratio number (DR 18).
- Pressure class (150).
- AWWA designation number (AWWA C900).
- Manufacturer's name or trademark and production code.
Seal of the testing agency that verified the suitability of the pipe material for potable water service (NSF).
Each length of pipe (standard or random), including the integral bell, shall be pressure tested to four times the rated pressure for a minimum of five seconds by the manufacturer.
Pipe shall meet all additional test requirements as described in AWWA C900 for Class 150 pipe.
Pipe shall be PW Pipe Twinseal® Class 150 with rubber gasket joint or approved equal.
Note: In poor soils and/or where special thrusting is necessary, ductile iron pipe, Class 52 with Megalug® followers, may be required by the District instead of PVC pipe.
HDPE: HDPE pipe and fittings shall conform to the current revision of AWWA C906, Standard for Polyethylene (PE) Pressure Pipe and Fittings, 4 inches. Through 65 inches. for Waterworks, except as superseded and/or supplemented herein. If these specifications and AWWA C906 differ, these specifications shall govern.
Properties: HDPE pipe and fittings shall be made from HDPE having a material designation of PE4710 meeting ASTM D3350 cell classification 445574C. The material shall be listed in PPI (Plastics Pipe Institute) TR-4 with a standard grade HDB rating of 1600 psi at 73°F and shall be listed and approved for potable water use in accordance with NSF/ANSI 61.
Unless otherwise specified in the contract documents, all HDPE joints shall be thermally butt fused.
***Any Contractor performing butt-fusion for the District, must qualify on P.U.D.’s butt-fusion procedure or provide documentation that their butt-fusion procedure is qualified and documentation showing fusion personnel are qualified on their procedures. This must be approved by P.U.D.
Note: It is a common practice and accepted industry “Rule of Thumb” when fusing pipes of unlike SDRs to fuse a maximum mismatch of 1 SDR.
8. Water Meter
All PUD water meters shall be a Badger Water Meter with an ADE register with an inline connector and Itron 100W ERT radio-read transmitter. The register must read in 1 cubic feet.
All meters shall meet AWWA specifications and standards. Meters shall be of the right size, type, and specification for which it was designed. Selection of the meter type and size shall be based only on the flow requirement (GPM) and type of application, and not the head.
All water meters and fittings in contact with potable water shall be “reduced lead” in accordance with the January 4, 2011 Amendment to the Federal Safe Drinking Water Act – Public Law No. 111-380 (Reduction of Lead in Drinking Water Act).
Meter specifications:
- For residential applications, a Badger Meter M25 5/8 x 3/4-inch shall be used, with a positive displacement disc capable of a maximum flow of 25 GPM. The register shall be a Badger ADE technology, with Itron inline connector and Itron 100W ERT.
- 1-inch Badger Meter M70, positive displacement disc capable of a maximum flow of 70 GPM. The register shall be a Badger ADE technology, with Itron inline connector and Itron 100W ERT.
- 1-1/2-inch Badger Meter M120, positive displacement disc capable of a maximum flow of 120 GPM. The Badger M120 shall have Elliptical Flanges and a 1-inch test plug so that the meter can be tested in place. The register shall be a Badger ADE technology, with Itron inline connector and Itron 100W ERT.
- 2-inch Badger Meter M170, positive displacement disc capable of a maximum flow of 170 GPM. The Badger M170 shall have Elliptical flanges and a 1-inch test plug so that the meter can be tested in place. The register shall be a Badger ADE technology, with an Itron inline connector and Itron 100W ERT.
- Contact the District for specifications on all meters over 2 inches.
9. Service Saddle
Service saddles shall be ductile iron bodies with nylon coating, stainless steel straps, and nuts in accordance with ASTM A536d and AISI C1015-20. Service saddles shall be Romac 101N with IPT threaded connection or approved equal.
10. Corporation Stop
Corporation stops shall be all brass, A.Y. McDonald #73131, with MIPT connections or approved equal; and installed so the operating lever is located on the side.
All water meters and fittings in contact with potable water shall be “reduced lead” in accordance with the January 4, 2011 Amendment to the Federal Safe Drinking Water Act – Public Law 111-380 (Reduction of Lead in Drinking Water Act).
11. Service Pipe
Service pipe shall be high-strength Polyethylene, cold-flare, service pipe capable of withstanding 300 psi at 73.4°F for 1,000 hours. Service pipe shall be 1-inch copper tubing size (CTS) and manufactured for use with standard flare or pack-joint fittings not requiring heat, flame, cement, or solvent to affect a seal.
Pipe shall be clearly marked showing the manufacturer's trademark, nominal pipe size, and type of material. Service pipe shall be Drisco Pipe 5100 CTS Ultra-Line Polyethylene pipe as manufactured by the Phillips Product Co., Inc., or approved equal.
12. Meter Setters
Meter setters shall be tandem, 9 inches tall, all copper and brass construction with dual check valve, equal to A.Y. McDonald #750212QAMM33 with MIPT connections.
All water meters and fittings in contact with potable water shall be “reduced lead” in accordance with the January 4, 2011 Amendment to the Federal Safe Drinking Water Act – Public Law 111-380 (Reduction of Lead in Drinking Water Act).
13. Pressure-Reducing Valves
Pressure-reducing valves shall be all brass and equal to Watts Regulator LF25AUBZ3.
All water meters and fittings in contact with potable water shall be “reduced lead” in accordance with the January 4, 2011 Amendment to the Federal Safe Drinking Water Act – Public Law 111-380 (Reduction of Lead in Drinking Water Act).
14. Service Pipe Adapters
Service pipe adapters to connect meter setters and corporation stops to polyethylene service pipe shall have FIPT x CTS pack joint, equal to A.Y. McDonald #74754-22.
All water meters and fittings in contact with potable water shall be “reduced lead” in accordance with the January 4, 2011 Amendment to the Federal Safe Drinking Water Act – Public Law 111-380 (Reduction of Lead in Drinking Water Act).
15. Meter / PRV Boxes
Water meter boxes and meter box extensions shall be manufactured from high-density polyethylene with the following physical properties:
| Flexure modulus | 90,000 psi | Hardness | 58 Shore D |
| Comprehensive strength 10% deflection | 1,100 psi | Specific gravity | 0.6 |
| Total load at center of top | 2,800 lbs | | |
Water meter boxes shall be Carson Industries #1220-12 with a Reading lid or approved equal. Water meter box extensions shall be Carson #1220-6X or approved equal.
Note: Carson Industries #1527-18XL boxes with a ductile iron lid (no riser required with 18-inch) may be required by the District in areas where traffic is expected.
16. Locate Wire
Locate wire shall be 10-gauge stranded copper wire with 600-volt insulation; Essex or approved equal.
17. Tapping Sleeve
Tapping sleeve shall be all stainless steel with a full circumferential seal. The body and bolts shall be 18-8 Type 304 Stainless Steel. The branch outlet shall be heavy stainless steel pipe with an ANSI 150 lb. flange. Gasket shall be full circumferential gasket compounded for use on water, salt solutions, mild acids/bases, and sewerage. Sleeve shall meet or exceed ANSI/AWWA C-223 and the MSS-SP 124 Standards as applicable. Sleeve shall be JCM 432 All Stainless Steel Tapping Sleeve or approved equal.
18. Tapping Valve (FLG x M.J.)
Tapping valve shall be manufactured for tapping purposes, with oversize bore and alignment ring. Fusion Epoxy coated inside and out in accordance with AWWA C213-91. Resilient seated type, in accordance with AWWA C509. Ductile iron body, with pressure rating of 250 psi working, 500 psi test. U.S. Pipe "Metroseal" or approved equal.
19. Air / Vacuum Valve
Air/vacuum valve shall be a combination air valve. APCO #143C or approved equal.
20. Casing (for Water Service Pipe)
Casing for service pipe shall be 1-1/2- or 2-inch PVC (200 psi) water pipe or approved equal.
Division 2 - Methods of Construction
1. General
Except as otherwise noted herein, all work shall be accomplished as recommended in applicable American Waterworks Association (AWWA) specifications and according to the recommendations of the manufacturer of the material or equipment used.
2. Alignment
Unless otherwise specified, the location of the water mains, valves, hydrants, and principal fittings, including modifications, will be staked out by the District when requested by the Installer. The pipe shall be laid closely to the specified alignment, without exceeding the manufacturers’ recommended minimum radius of curvature. Alignment deviation shall not exceed 0.5 feet. Replacement of stakes lost or destroyed shall be made at the Installer's expense.
3. Trench Excavation
Any area where personnel must enter the trench shall be excavated in accordance with Chapter 296-155 WAC of the Washington State Safety Code. This code requires that the excavated material be at least 2 feet from the edge of the trench and that any trench over 4 feet deep is sloped, shored, sheeted, or otherwise adequately protected against sloughing.
Trenches shall be excavated to the line and depth designated by the District to provide a minimum of 36 inches of cover over the pipe, and/or 30 inches of cover when crossing the existing roadway ditch, whichever is deeper, unless otherwise shown on the contract drawings. Except for unusual circumstances where approved by the District, the trench sides shall be excavated vertically and the trench width shall be excavated only to such widths as are necessary for adequate working space. The maximum trench width at the top of the pipe shall normally be the outside diameter of the pipe barrel plus 16 inches. The top width of the trench shall not exceed the outside diameter of the pipe plus 30 inches.
The trench shall be kept free from water until jointing is complete. Surface water shall be diverted so as not to enter the trench. The Installer shall maintain sufficient pumping equipment on the job to ensure that these provisions are carried out.
Gravel required in the bottom of the trench due to action of weather or workmen shall be furnished by the Installer. Boulders, rocks, roots, and other obstructions shall be entirely removed or cut out to the width of the trench and to a depth 6 inches below the water main grade. Where material is removed from below water main grade, the trench shall be backfilled to grade with material satisfactory to the District and thoroughly compacted.
Trenching operations shall not proceed more than 300 feet in advance of pipe laying, except with written approval of the District.
When trenching operations cut through the pavement, the pavement shall be removed to a width of 18 inches greater than the top width of the trench. The pavement shall be cut on a straight line and shall beveled so that the cut will be approximately 1 inch wider at the top than at the bottom. Pavement shall be cut ahead of the trenching equipment to prevent excessive tearing up of the surfacing and to eliminate ragged edges.
Any time potential historic or pre-historic cultural resources or human remains are discovered during trenching or excavation, work must be stopped and appropriate Clallam PUD project management personnel must be notified immediately. Work will not recommence without notice from the Clallam PUD project manager. Failure to comply with this procedure may expose the contractor to criminal liability under RCW 27.53.060.
4. Timbering, Sheeting, and Shoring
The Installer shall provide and install timbering, sheeting, and shoring as necessary to protect workmen, the work, and existing buildings, utilities, and other properties. Removal of timbering, sheeting, and shoring shall be accomplished in such a manner that there will be no damage to the work or to other properties. All timbering, sheeting, and shoring shall be the Installer's design, and in accordance with Washington State Department of Labor and Industries Standards.
5. Laying Gasketed Pipe
The Installer shall check the inside of the pipe to ensure that all foreign matter in the socket has been removed. The gasket seat shall be thoroughly inspected to be certain it is clean. The gasket must be wiped clean with a clean cloth, flexed, and then placed in the socket so that the gasket is seated evenly around the inside of the socket with the heel of the gasket fitting snugly in the retainer seat. When installing pipe in sub-freezing weather, the gaskets, prior to their use, must be kept at a temperature of 40°F or higher and dry by suitable means.
A film of lubricant shall be applied to inside surface of gasket which will come in contact with the entering plain end of pipe. The plain end of the pipe must be cleaned of all foreign matter and a film of lubricant applied to the outside of the plain end. The plain end of the pipe shall be aligned and carefully entered into the socket until it just makes contact with the gasket.
Joint assembly shall then be completed by forcing the plain end of the entering pipe past the gasket until the black stab line comes flush with the socket face.
For joint assemblies, 8 inches and smaller, socketing of the plain end may be accomplished in some cases by pushing against face of bell of entering pipe with a crowbar or spade.
The force required to complete the assembly shall be by the crowbar or jack methods. "Stabbing," with the use of a backhoe or excavator, the plain end of the pipe into the bell, will not be acceptable.
When left unattended, a suitable plug shall be installed at the end of the laid pipe to inhibit contamination.
6. Laying Mechanical Joint Pipe and Fittings
The inside of the socket and the plain end of the pipe shall be thoroughly cleaned of all foreign matter. With a gland and gasket on plain end of pipe, seal the plain end of pipe into the socket. Press gasket firmly and evenly into a socket. Move gland into position, insert all bolts, and make all nuts finger-tight. All bolts shall be tightened evenly at all points around the gland by alternating tightening of bolts from side to side. Repeat the tightening cycle until all bolts are tightened to 75 to 90 foot-pounds of torque. When left unattended, a suitable plug shall be inserted at the end of the laid pipe to inhibit contamination.
Lubrication of mechanical joint gaskets is not permitted.
7. Backfilling
Backfilling and surface restoration shall closely follow installation and testing of the pipe, so that not more than 300 feet of pipe is left exposed without express approval of the District. Selected bedding material (free of particles larger than 1-inch) shall be placed and compacted around and under the water mains by hand tools to a height of 6 inches above the top of the water main. The remaining backfill shall be placed and compacted; except that under driveways and roadways, all backfill material shall be placed in layers not more than 6 inches thick and compacted to the density of the existing sub-grade. Where governmental agencies other than the District have jurisdiction over roadways, the backfill and compaction shall be done to the satisfaction of the agency having the jurisdiction. No pipe shall be backfilled until the District's Inspector has inspected and approved of the pipe's bedding.
8. Gate Valve Installation
Gate valves shall be set in the ground level and shall be opened and shut under pressure and the packing gland adjusted so as to permit easy operation and at the same time show no leakage. Valves shall be blocked in accordance with Blocking Details. Maximum distance between valves on distribution mains is subject to District approval. At water main intersections, valves shall be placed on 4 out of 4 legs at each cross, and 3 out of 3 legs at each tee, except when tapping an existing water main. For fire hydrant auxiliary valves and blowoffs see Exhibits.
9. Valve Box Installation
Valve boxes shall be installed on all underground valves and shall be set flush in pavement and gravel roads as required by the District.
10. Valve Marker Installation
Painted (Waterous "Bright Yellow" #V1814Y) concrete marker posts shall be set for all valve or valve clusters except auxiliary hydrant valves. The post shall be set at right angles to the road from the valve and shall be situated in a safe and reasonably conspicuous location, normally on the property line. Markers shall be set a minimum of 18 inches into the ground.
11. Concrete Blocking
Concrete blocking shall have a minimum of 1/2-square foot bearing against the fitting and 2 square feet bearing against undisturbed soil. Blocking shall bear against fittings only and shall be clear of joints so as to permit taking up or dismantling joints. All hydrants, elbows, gate valves, and tees shall be blocked in accordance with Blocking Details. The Installer shall install blocking that is adequate to withstand full test pressure as well as to continuously stand operating pressures under all conditions of service. Concrete blocking shall be based on 200 psi test pressure with a safe soil-bearing load of 3,000 pounds per square foot. All hydrants, elbows, gate valves, and tees shall sit flush on 8" x 16" x 4" solid concrete block(s).
Note: A District representative must inspect the trench excavation prior to pouring any thrust block. Failure to notify the District prior to pouring concrete may require removal of concrete to facilitate the trench excavation inspection. Situations may occur that require special size and shape of solid concrete thrust blocks. When required, they will be designed by the District and installed as directed by the District's Inspector.
12. Blowoff Installation
The purpose of a blowoff is to allow for flushing of the water main extension. A blowoff shall be installed at the end of any new water main extension except when a fire hydrant can be used for this purpose. In some instances, the District may require an inline gate valve prior to a blowoff assembly. See Exhibits for blowoff designs.
13. Meter Installation
Water meter setters shall be set vertically in center of meter box with Inlet/Outlet of setter flush with the bottom of meter box. Meter box shall be set where staked and flush with the existing ground. 1-meter box extension shall be used per each meter box to obtain an acceptable depth. Meter setter shall be held vertically with stakes approved by the District. Taps shall be a minimum of 24 inches apart on PVC; all others require District approval prior to tapping.
14. Sterilization and Flushing of Water Mains & Fire Hydrants
Sterilization of water mains and fire hydrants shall be accomplished by the Installer in accordance with the requirements of the Washington State Health Department and in a manner satisfactory to the District. The section to be sterilized shall be thoroughly flushed at maximum flow prior to chlorination. Sections will ordinarily be sterilized between adjacent gate valves unless, in the opinion of the District, a longer section may be satisfactorily handled.
Hydrants along the chlorinated section shall be opened during application until the presence of chlorine has definitely been detected. When a chlorine concentration of not less than 50 ppm has been established throughout the main, the valves shall be closed and the main left undisturbed for 24 hours.
The Installer shall then thoroughly flush the water main and/or fire hydrant(s), disposing of all highly chlorinated water in accordance with AWWA and DOE requirements, and exercising special care to avoid damage to surrounding property.
The District shall be on site to operate all valves during filling and flushing. Installers shall not operate valves connected to the District's system.
15. Hydrostatic Tests
The mains and/or fire hydrants shall be filled with water and all air removed prior to starting the test. The test shall be accomplished by pumping the main up to the required pressure (1.5 times the operating pressure or 200 psi, whichever is greater); stopping the pump for 20 minutes, and then pumping up to the test pressure again. The quantity of water required to restore the pressure shall be accurately determined by pumping through a positive displacement water meter with a sweep unit hand registering 1 gallon per revolution, or a calibrated barrel. Acceptability of the test will be determined by 2 factors: (a) there shall not be an appreciable or abrupt loss in pressure during the 20 minute test period; (b) the quantity of water lost from the main shall not exceed the following table. Gauges used in the test shall be accompanied by satisfactory certifications of accuracy from a laboratory approved by the District.
Table of allowable water Loss per 1000 linear feet of pipe in 20-minute test period
| Pipe Size | Water Loss |
| 2 inches | 0.07 Gallon per 1,000' Pipe |
| 4 inches | 0.15 Gallon per 1,000' Pipe |
| 6 inches | 0.22 Gallon per 1,000' Pipe |
| 8 inches | 0.28 Gallon per 1,000' Pipe |
| 10 inches | 0.36 Gallon per 1,000' Pipe |
| 12 inches | 0.42 Gallon per 1,000' Pipe |
Prior to calling out the District to witness the pressure test, the Installer shall have all equipment set up completely ready for operation and shall have successfully performed the test to assure himself that the pipe is in a satisfactory condition. Final hydrostatic tests shall be performed only Monday through Wednesday, and only in the presence of the District inspector.
16. Coliform Bacteria Analysis
Upon satisfactorily completing a hydrostatic test of the main, the Installer shall disinfect and flush the new water main in accordance with the AWWA Standard for Water Main Disinfection (C651-14) and submit a coliform bacteria analysis (bacteriological sample) to the Clallam County Department of Health or State-approved laboratory, Monday through Wednesday only. Laboratory certification and bacterial analysis method performed will comply with 40 CFR 141.852.
17. Replacing Road Surfacing
The Installer shall restore all roadway and driveway surfaces excavated or disturbed to a condition acceptable to the governmental agency having control of the road and/or the District. The Installer shall notify the Clallam County Department of Public Works Road Supervisor 7 calendar days prior to open-cutting any County road.
18. Locate Wire Installation
The locate wire shall be installed in the same ditch and at the same elevation as the water main.
19. Placement of Other Utilities
No other utilities shall be placed in the water main trench without prior approval from the District. Primary electrical trenches shall be located a minimum of 5 feet laterally from a water main trench. Non-potable piping shall be located a minimum of 10 feet laterally from a water main trench.
Where non-potable piping must cross water mains, the water main must be located a minimum of 18 inches above the non-potable water piping. If an 18 inches vertical separation is unavoidable, a minimum of 20-foot continuous stick on PVC conduit/casing shall be centered on 1 of the crossing pipes. Where these vertical separation requirements cannot be met special construction methods will be implemented in accordance with DOH/ODW Water System Design Manual section 8.4.4.
20. Cross Connection Control
The District has a Cross Connection Control Policy. For utility placement specifications of non-potable water piping, see section 19. See the District’s Cross Connection Control Policy for all other related issues pertaining to backflow prevention.
