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Potable Water Dist. Systems

Potable Water Dist. Systems

(Section 02650)

PART 1 GENERAL

1.01 WORK INCLUDED

A. Contractor shall provide all materials, labor, equipment, transportation, and other items required to provide and install potable water distribution systems as required by applicable codes and regulations, and as specified herein.

B. Potable water distribution systems shall include, but not be limited to the following.

     1. Potable water transmission or distribution piping.

     2. Valves, fittings, and accessories.

     3. Thrust blocking and corrosion protection.

     4. Hydrostatic and Leakage testing.

1.02 RELATED WORK

A. Section 02220 Excavation, Backfill and Compaction.

     1. Excavation of trenches, pipe bedding and backfill, compaction of backfill

B. Section 02675 - Disinfection of Water Distribution Systems

C. Division 03000 - Concrete

     1. Thrust blocks, structures associated with water systems.

1.03 REFERENCES

A. The applicable provisions of the latest editions of the References listed below shall govern the Work covered under this Section, unless there is a conflict between said References and the requirements of this Section. In the case of such a conflict, the requirements of this Section shall apply.

B. American Water Works Association (AWWA)

C. American Society for Testing and Materials (ASTM)

D. American National Standards Institute (ANSI)

E. American Association of State Highway and Transportation Officials (AASHTO)

     1. Standard Specifications for Highway Bridges

F. Ductile Iron Pipe Research Association (DIPRA)

G. Uni-Bell PVC Pipe Association

H. Midvale City Corporation Standard Construction Details

1.04 SUBMITTALS

A. Submit shop drawings, manufacturer's literature, certifications, and other product data in accordance other sections and as specified herein.

B. Required submittals include, but are not limited to:

     1. Evidence of materials conformance with these specifications.

     2. Manufacturer's recommended transportation, unloading and storage requirements. Manufacturer's installation guides and instructions.

     3. Dimensional information for pipe, valves, fittings, castings, and structures.

C. Contractor shall maintain accurate construction record drawings of all as-built valve, fitting, and line locations, manhole locations, pipe lengths, and other relevant data and shall submit these records to the Engineer for approval prior to application for final completion.

1.05 QUALITY ASSURANCE

A. Transportation, handling, storage and installation practices shall be in accordance with manufacturer's recommended practice for materials provided as part of this Work.

B. Contractor's personnel shall be experienced in the installation of materials provided as part of the Work, and shall comply with manufacturer's recommended practices during handling, placement and installation of such materials.

C. Pipe, valve and appurtenant materials and Workmanship shall be in accordance with ANSI/NSF 61 and AWWA Standards as applicable.

1.06 DELIVERY, STORAGE AND HANDLING

A. Contractor shall be responsible for proper transportation, unloading, handling, storage and security of all equipment and materials to be provided as part of this specification in accordance with manufacturer's recommendations.


B. Materials shall be stored in such a manner as to prevent damage or degradation. Any materials damaged prior to installation shall be removed from the project and replaced with new materials at no additional cost to Owner. Lost or stolen materials shall be replaced at no additional cost.

C. Load and unload pipe, fittings, specials, valves and accessories by lifting with hoists or skidding so as to avoid shock or damage. Do not skid or roll pipe on skidways against pipe already on the ground.

D. Each length of pipe shall be unloaded opposite or near the place where it is to be laid in the trench.

E. Polyvinyl Chloride (PVC) piping, fittings, and materials shall be protected during storage from ultraviolet and ozone degradation. Noticeably faded materials shall not be installed and shall be promptly removed from project site.

F. At times when pipe laying is not in progress, the open end(s) of pipe in the trench shall be closed by a watertight plug.

1.07 PROJECT CONDITIONS

Not Used

PART 2 PRODUCTS

2.01 MANUFACTURERS

A. Manufacturers providing materials or equipment as part of this specification shall have a minimum of five (5) years in the design, manufacture, and testing of such materials.

B. Manufacturers shall provide, upon request, verification of a consistent record of meeting or exceeding materials or performance standards as specified herein.

C. Allowable Manufacturers - Subject to compliance with specified requirements, manufacturers offering products that may be incorporated in the Work include, but are not limited to the following:

     1. Water System Piping

          a. Ductile Iron (DIP)
               i. Pacific States Cast Iron Pipe Company, Provo, Utah
               ii. United States Pipe and Foundry Company, Birmingham, Alabama
               iii. Tyler Pipe, Tyler, Texas (Fittings Only)

          b. Polyvinyl Chloride (PVC)
               i. J - M Manufacturing Company, Livingston, New Jersey
               ii. Extrusion Technologies, Incorporated, Denver, Colorado
               iii. Pacific Western Extruded Plastics Company, Eugene, Oregon

 

     2. Valves

          a. Gate Valves
               i. Mueller Company, Decatur, Illinois
               ii. Clow/McWane Incorporated, Birmingham, Alabama
               iii. American Darling

          b. Tapping Sleeves and Valves
               i. Mueller Company, Decatur, Illinois
               ii. Clow/McWane Incorporated, Birmingham, Alabama

          c. Butterfly Valves
               i. Mueller Company, Decatur, Illinois
               ii. Clow/McWane Incorporated, Birmingham, Alabama

          d. Check Valves
               i. Mueller Company, Decatur, Illinois
               ii. Clow/McWane Incorporated, Birmingham, Alabama

          e. Air Relief/Vacuum Valves
               i. Crispin Multiplex Manufacturing Company, Berwick, Pennsylvania
               ii. G A Industries, Mars, Pennsylvania
               iii. APCO Willamette Valve and Primer Corporation, San Clemente, California

          f. Pressure Reducing Valves
               i. CLA-VAL Company, Newport Beach, California
               ii. G A Industries, Mars, Pennsylvania

2.02 POTABLE WATER SYSTEM PIPING

A. Water system piping shall be of the size, type, and class indicated on the drawings and as specified herein.

B. Ductile Iron Pipe and Fittings

     1. Ductile iron pipe shall be designed and manufactured in accordance with the following requirements:

          a. AWWA/ANSI C150/A21.50 - American National Standard for the Thickness Design of Ductile Iron Pipe.

          b. AWWA/ANSI C151/A21.51 - American National Standard for Ductile Iron Pipe, Centrifugally Cast, for Water and Other Liquids.

     2. Ductile iron fittings shall comply with the requirements of the following:

          a. AWWA/ANSI C110/A21.10 - American National Standard for Ductile Iron and Grey Iron Fittings, 3 in. through 48 in., for Water and Other Liquids.
 

          b. AWWA/ANSI C153/A21.53 - American National Standard for Ductile Iron Compact Fittings, 3 in. through 24 in. and 54 in. through 64 in. for Water Service.

     3. Ductile iron pipe and fittings shall be cement mortar lined and shall have a bituminous seal coat in accordance with the requirements of AWWA/ANSI C104/A21.4 - American National Standard for Cement-Mortar Lining for Ductile Iron Pipe and Fittings for Water.

     4. Joints and gaskets shall be in accordance with AWWA/ANSI C111/A21.11 - American National Standard for Rubber Gasketed Joints for Ductile Iron Pressure Pipe and Fittings.

     5. Flanged pipe shall be in accordance with AWWA/ANSI C115/A21.15 - American National Standard for Flanged Ductile Iron Pipe with Ductile Iron or Grey Iron Threaded Flanges.

C. Polyvinyl Chloride Pipe

     1. PVC pipe shall be manufactured from virgin Class 12454A or 12454B materials as defined by ASTM D1784

     2. PVC pipe and fittings shall be designed and manufactured in accordance with the following requirements:

           a. AWWA C900 - Polyvinyl Chloride (PVC) Pressure Pipe, 4 in. Through 12 in., for Water Distribution.

           b. AWWA C905 - Polyvinyl Chloride (PVC) Water Transmission Pipe, Nominal Diameters 14 in. Through 36 in.

          c. AWWA C907 - Polyvinyl Chloride (PVC) Pressure Fittings for Water - 4 in. Through 8 in.

D. Steel Piping

     1. Steel water piping shall be manufactured and fabricated in accordance with the requirements of the following:

          a. AWWA C200 - Steel Water Pipe - 6 in. and Larger.

          b. AWWA C206 - Field Welding of Steel Water Pipe.

      2. Steel water pipe fitting shall be manufactured and fabricated in accordance with the requirements of the following:

          a. AWWA C207 - Steel Pipe Flanges for Waterworks Service - Size 4 in. through 144 in.

          b. AWWA C208 - Dimensions for Fabricated Steel Water Pipe Fittings.

     3. Steel water pipe shall be provided with interior and exterior corrosion protection in accordance with AWWA C213 - Fusion Bonded Epoxy Coating System for the Interior and Exterior of Steel Water Pipelines.

2.03 CORROSION PROTECTION

A. Bolts: Apply 2 coats of Coal for Mastic (Kopper 50 or equal) to all exposed surfaces of bolts and to all bolt threads after installation of piping, fittings, valves, and couplings.

B. Fittings, valves, and specialties shall be tape wrapped with Polyken 930 filler tape for filling voids and with Polyken 930 tape to cover.

C. Polyethylene encasement, if required, shall conform to AWWA/ANSI C105/A21.5 - American National Standard for Polyethylene Encasement for Ductile Iron Piping for Water and Other Liquids.

2.04 VALVES

A. Gate valves:

     1. Shall be iron body, fully bronze mounted, double disc parallel seat, or resilient seat non-rising bronze stem with mechanical joint ends, except as otherwise specified or shown on the Drawings.

     2. Gate valves shall conform to the following requirements:

          a. AWWA C500 - Metal Seated Gate Valves for Water Supply Service.

          b. AWWA C509 - Resilient Seated Gate Valves for Water Supply Service.

     3. All valves shall be provided with a 2" square operating nut for key operation from ground surface and open to the left, unless handwheels are indicated.

     4. Valve body and gates shall be rated to a design working pressure of 200 psig for valves up to 12", and 150 psig for valves of 16" or greater. All valves shall be factory tested to twice the rated working pressure.

     5. Gate valves for potable water service shall be epoxy lined in accordance with AWWA/ANSI C550 - Protective Epoxy Interior Coatings for Valves and Hydrants.

     6. Gate valves shall be similar and equivalent to that produced by the following manufacturers:

          a. Mueller Cat. No. A-2370 or A-2380

          b. Clow Cat. No. F-6100 or F-5000 Series

B. Tapping valves and sleeves:

     1. Tapping valves shall have large diameter seat rings to permit entry of tapping machine cutters. Inlet shall be flanged. Outlet shall suit branch piping and shall include the required flange for tapping machine adapter connection. Tapping valves shall conform to the applicable requirements for gate valves as specified herein.

     2. Tapping sleeves shall be suitable for assembly around the existing main. Body shall be high strength ribbed construction. End gaskets shall be sized to suit the existing main.

     3. Tapping valves and sleeves shall similar and equivalent to those produced by the following manufacturers:

          a. Clow Cat. No. F-5205

          b. Mueller Cat. No. H-600 Series

C. Butterfly Valves

     1. Butterfly valves shall conform to the requirements of AWWA/ANSI C504 - Rubber Seated Butterfly Valves.

     2. Butterfly valves for potable water service shall be epoxy lined in accordance with AWWA/ANSI C550 - Protective Epoxy Interior Coatings for Valves and Hydrants.

     3. Butterfly valves shall be similar and equivalent to those produced by the following manufacturers:

          a. Mueller Lineseal III Series

          b. Clow Cat. No. F-5300 Series

D. Check Valves

     1. Check valves shall conform to the requirements of AWWA/ANSI C508 - Swing Check Valves for Waterworks Service - 2 in. Through 24 in. NPS.

     2. Check valves for potable water service shall be epoxy lined in accordance with AWWA/ANSI C550 - Protective Epoxy Interior Coatings for Valves and Hydrants.

     3. Check valves shall be weighted swing arm type unless otherwise noted, similar and equivalent to those produced by the following manufacturers:

          a. Mueller Cat. No. A-2600 Series

          b. Clow Cat. No. F-5300 Series
 

E. Air Relief/Vacuum Valves

     1. Air relief/vacuum valves shall conform to the requirements of AWWA/ANSI C512 - Air-Release, Air/Vacuum, and Combination Air Valves for Waterworks Service.

     2. Air and Vacuum Valves shall vent air from lines being filled and shall allow entry of air upon draining of lines. Design of valves shall be such that velocity of air passing through the valve will not blow float shut at design volumes.

          a. Valve body shall be cast iron conforming to ASTM A126, Class B.

          b. Float, and guide rod shall be stainless steel conforming to ASTM A240 and A582, respectively.

          c. Valves shall be designed to withstand hydrostatic pressures of 300 psig.

          d. Valve seat shall be BUNA-N Rubber.

          e. Valve inlet shall be ANSI Class 125 or Class 250 flanged, or NPT as indicated.

          f. Valve shall be of the size indicated and shall include vent piping of the size, type and configuration indicated.

          g. Air and Vacuum Valves shall be similar and equivalent to Crispin AL Series as manufactured by Multiplex Manufacturing Co.

     3. Air Relief Valves shall vent air from high points in lines under pressure.

          a. Valve body shall be cast iron conforming to ASTM A126, Class B.

          b. Float, float lever and operating linkages shall be stainless steel conforming to ASTM A240 or A582, bronze conforming to ASTM B62, or brass conforming to ASTM B16.

          c. Valves shall be designed to withstand hydrostatic pressures of 300 psig.

          d. Valve seat shall be PVC or stainless steel conforming to ASTM A276.

          e. Valve inlet shall be ANSI Class 125 or Class 250 flanged, or NPT as indicated.

          f. Valve shall be of the size indicated and shall include vent piping of the size, type and configuration indicated.

          g. Pressure Air Relief Valves shall be similar and equivalent to Crispin P Series as manufactured by Multiplex Manufacturing Co.

     4. Combination or Universal Air Relief Valves shall allow air to be vented from lines being filled, shall allow entry of air when lines are being drained, and shall allow venting of air from lines under pressure. Valve shall be a single unit (universal type) or dual unit (combination type) assembly as indicated.

          a. Universal Air Relief Valves shall be similar and equivalent to Crispin UL Series as manufactured by Multiplex Manufacturing Co.

          b. Combination Air Relief Valves shall consist of an Air and Vacuum Valve and a Pressure Air Release Valve and shall be similar and equivalent to Crispin C Series as manufactured by Multiplex Manufacturing Co.

F. Pressure Reducing Valves (PRV)

     1. Pressure reducing valves shall be hydraulically operated, pilot controlled diaphragm operated, globe pattern regulating valves with the following function features.

          a. Reduce variable inlet pressure to constant downstream pressure regardless of flow rate.

          b. Include pressure sustaining feature to maintain inlet pressure above a predetermined minimum.

          c. Rate of opening/closing adjustment.

     2. PRV unit shall consist of valve body, pilot controls, related piping and all other items required to provide a complete, operational installation. PRV unit shall be constructed of the following materials:

          a. Valve body and cover shall be of ductile iron meeting the requirements of ASTM A536.

          b. Trim shall be bronze meeting the requirements of ASTM B62.

          c. Stem, nut and spring shall be of Type 304 stainless steel.

          d. Disk shall be Buna-N rubber.

          e. Diaphragm shall be of nylon reinforced Buna-N rubber.

          f. Pilot assemblies shall consist of bronze (ASTM B62) pilot control, Type 303 stainless steel trim, and Buna-N synthetic rubber parts. Control assembly shall be provided with a strainer.

          g. Control valves and piping shall be of bronze, copper, stainless steel or other non-corrosive metals.

     3. Working pressure shall be 150 psi at maximum water temperature of 180 F.

     4. Valve size, inlet/outlet pressures, and screwed/flanged designation shall be as indicated on the drawings.

     5. Pressure reducing valves shall be similar and equivalent to the following:

          a. CLA-VAL Model 92-01

2.05 VALVE BOXES

A. Shall be suitable for HS-20 (AASHTO) traffic loading.

B. Shall be furnished and installed over each line valve and over each auxiliary hydrant valve. All buried valves shall be installed complete with two-piece, cast iron, screw type, 5-1/4 inch shaft valve box.

2.06 HYDRANTS

A. Hydrants shall be dry barrel type, of cast or ductile iron construction, with bronze glands, bushings, stems, stem nuts, valve seats, and nozzles.

B. Hydrants shall conform to the requirements of AWWA/ANSI C502 - Dry Barrel Fire Hydrants.

     1. Hydrant rated working pressure shall be 200 psig.

C. Hydrant features shall conform to the following requirements:

     1. Main valve opening shall be a minimum of 4-1/2".

     2. Pumper and hose nozzles shall be threaded in accordance with National Standard hose coupling thread specifications..

          a. Provide one (1) pumper nozzle, 3" nom. ID., 7.5 threads per inch.

          b. Provide two (2) hose nozzles, 2-1/2" nom. ID., 6 threads per inch.

     3. Operating nut shall be National Standard, 1-1/2" pentagon, opening counter- clockwise.

     4. Hydrants shall be warranted for ten (10) years against defects in materials and workmanship and shall be similar and equivalent to those produced by the following manufacturers:

          a. Mueller Centurion Series

          b. Clow Medallion Series

D. Hydrant appearance and paint scheme shall be in accordance with the requirements of the local jurisdiction.

     1. Painting shall be in accordance with Section 09900 of these specifications

2.07 SERVICE SADDLES

A. Shall consist of a brass body and two flattened silicone bronze straps, meeting applicable sections of ANSI/AWWA C800 - Underground Service Line Valves and Fittings.


B. Outlet shall be tapped with AWWA I.P. thread (F.I.P.T.). Outlet shall be o-ring sealed.

C. Shall be rated for a maximum working pressure of 200 psi.

2.08 REPAIR CLAMPS

A. Clamps shall provide a gasketed seal around the full circumference of the pipe. Bolts shall be high strength stainless steel.

B. Gasket dimensions shall suit existing and new pipe, as required.

C. Quality standard: Mueller series 520 and 530.

2.09 WATER MANHOLES

A. Water manholes shall consist of concrete base, riser and cone sections as well as iron ring and cover.

B. Manhole sections shall be manufactured in accordance with ASTM C478 and shall be designed to withstand AASHTO H20 loadings.

C. Manholes shall be watertight, both in floor and full height of walls. Joints shall be made water tight by the use of Kent-Seal or approved equivalent. Manhole grade rings shall be set in a full bed of mortar.

D. Manhole frames and covers shall be of suitable for AASHTO H20 loadings, manufactured of ductile or grey cast iron.

E. The bearing surface between frame and cover shall be machined to prevent rocking or uneven bearing.

     1. Cover shall bear the lettering "WATER".

PART 3 EXECUTION

3.01 EXAMINATION

A. Verify that Work covered under other sections of these specifications is complete to the point that Work covered under this section may properly commence without hindering or damaging Work of other trades. Do not proceed with construction until unsatisfactory conditions have been corrected.

B. Carefully examine all pipe fittings, valves and other appurtenances for damage and other defects immediately before installation.

C. Mark and hold defective materials for inspection by Owner, who may prescribe corrective repairs or reject the materials.

D. Prior to installation, inspect valves for direction of opening, freedom of operation, tightness of pressure resisting bolts, cleanliness of valve ports and seating surfaces, handling damage and cracks. Hold defective valves for inspection by Owner.

E. Verify installation or connection requirements prior to construction by potholing as necessary.

3.02 METHODS AND PROCEDURES

A. General

     1. Prior to pipe installation, prepare trench in accordance with the plans and Section 02220 Excavation, Backfilling and Compaction.

     2. Proper implements, tools, and facilities shall be provided and used for the safe and convenient performance of the Work. All pipe, fittings, and valves shall be lowered carefully into the trench by means of a derrick, ropes, or other suitable tools or equipment, in such a manner as to prevent damage to materials, protective coatings and linings. Under no circumstances shall water system materials be dropped or dumped into the trench.

     3. Manufacturers' Installation Manual recommendations for handling and laying pipe, fittings and related materials shall be strictly adhered to. In no case shall these materials be dropped or dumped during transport, unloading, or handling.

3.03 INSTALLATION

A. Water Pipe Installation

     1. Water pipe installation shall be in accordance with the applicable requirements of the following documents:

          a. AWWA/ANSI C600 - Installation of Ductile Iron Water Mains and their Appurtenances.

          b. AWWA C605 - Underground Installation of Polyvinyl Chloride (PVC) Pressure Pipe and Fittings for Water.

          c. AWWA/ANSI C105/A21.5 - Standard for Polyethylene Encasement for Ductile Iron Piping for Water and Other Liquids.

          d. DIPRA - The Guide for the Installation of Ductile Iron Pipe

          e. UNI-B-3-92 - Recommended Practice for the Installation of Polyvinyl Chloride (PVC) Pressure Pipe (Nominal Diameters 4-36 Inch).

     2. All lumps, blisters, and excess coating shall be removed from the bell and spigot ends of each pipe, and the outside of the spigot and the inside of the bell shall be wiped clean and dry so as to be free from dirt, sand, grit, or any foreign material before the pipe is laid. Bevel and file spigot of pipe to prevent gasket damage during joint assembly.

     3. The water pipe shall be laid and maintained to lines and grades established by the Drawings and Specifications with fittings and valves at the required locations unless otherwise approved by Owner.
 

     4. When crossing existing pipelines or other structures, alignment and grade shall be adjusted as necessary, with the approval of Engineer to provide clearance as required by federal, state, or local regulations or as deemed necessary by Engineer to prevent future damage or contamination of either structure.

     5. Lay all water lines on a continuous grade to avoid high points except as shown on the Drawings.

     6. Prevent foreign material from entering the pipe while it is being placed in the trench. During laying operations, no soil, debris, tools, clothing, or other materials shall be placed in, or allowed to enter the pipe.

     7. Assemble joints in accordance with manufacturer's recommendations.

     8. The pipe shall be brought to correct line and grade, and shall be secured in place with approved backfill material in accordance with Section 02220 Excavation, Backfilling and Compaction.

     9. Wherever it is necessary to deflect pipe from a straight line, either in the vertical or horizontal plane, to avoid obstructions or where long-radius curves are permitted, the amount of deflection allowed shall not exceed that recommended by pipe manufacturer.

     10. At times when pipe laying is not in progress, the open ends of pipe shall be closed by a watertight plug or other means approved by the Owner. When practical, the plug shall remain in place until the trench is pumped completely dry. Care must be taken to prevent pipe flotation should the trench fill with water.

     11. Where necessary, cut pipe perpendicular to the pipe centerline. Grind cut ends and rough edges smooth. For push on joint connections, the cut end shall be beveled.

     12. Fire hydrants shall be set plumb at proper finish grade as indicated on the drawings (see typical hydrant detail).

B. Valve Installation

     1. Locate valves as shown on drawings.

     2. Orient valve operating stems in a manner that will allow proper operation.

     3. A valve box shall be provided for every valve that has no gearing or operating mechanism or in which the gearing or operating mechanism is fully protected with a gear case. The valve box shall not transmit shock or stress to the valve and shall be centered over the operating nut of the valve. Set box cover at grade shown on Drawings.

     4. In no case shall valves be used to bring misaligned pipe into alignment during installation. Support pipe in such a manner as to prevent stress on the valve.


C. Thrust Block Installation

     1. Provide thrust blocks at reducers, valves, tees, hydrants, plugs and caps, and at bends deflecting 11-1/4 degrees or more.

     2. Place thrust block between solid ground and the component to be shored; the area of bearing on the pipe and on the ground in each instance shall be that shown on Drawings. Unless otherwise shown or directed, locate block so as to contain the resultant thrust force and so that the pipe and fitting joints will be accessible for repair.

     3. Concrete for thrust blocks shall have a compressive strength of not less than 2500 psi at 28 days. Concrete mixes shall be provided in accordance with Section 03300 of these specifications.

D. Corrosion Protection

     1. Polyethylene encasement, if required shall be provided and installed in accordance with the requirements of AWWA/ANSI C105/A21.5 - Standard for Polyethylene Encasement for Ductile Iron Piping for Water and Other Liquids.

3.04 PROTECTION

A. Provide barricades and restrict access as appropriate to prevent damage to Work in place.

B. Contractor shall be responsible for protection of Work in place against displacement, damage, loss, or theft until Owner's acceptance. Any Work installed and subsequently damaged, lost, or displaced shall be repaired or replaced to the Owner's satisfaction at no additional cost.

3.05 CLEANING

A. Thoroughly clean all pipe lengths or units of all debris immediately after laying.

B. Thoroughly clean by flushing and remove all debris from water mains and appurtenances. Inspect and verify lines are clean prior to submitting facilities for Owner's acceptance.

3.06 TESTING

A. Temporary connections for pressure testing shall be made by Contractor at his expense and removed by Contractor after satisfactory completion of the testing Work.

B. Hydrostatic Pressure Test:

     1. After completion of the installation of the system, or any reasonable length thereof, prior to backfilling and after thorough flushing of the portion to be tested, pressure tests shall be made. The system to be tested shall be subjected to a hydrostatic pressure of 150 pounds per square inch, unless otherwise noted on the Drawings, for a period of not less that 2 hours duration.


     2. The portion to be tested shall be filled with water slowly and the specified test pressure shall be applied by means of a pump connected to the pipe in a manner satisfactory to the Engineer. The Contractor shall make the temporary connection for pressure testing.

     3. Before applying the specified test pressure, air shall be expelled completely from the pipe, valves, and hydrants. If permanent air vents are not located at all high points, the Contractor shall install corporation stops at such points so that the air can be expelled as the line is filled with water. After all the air has been expelled, the corporation cocks shall be closed and the test pressure applied. At the conclusion of the pressure test, the corporation cocks shall be removed and plugged by the Contractor.

     4. All exposed pipe, fittings, valves, hydrants, and joints shall be examined carefully during the test. Any damage or defective pipe, fittings, valves, or hydrants that are discovered following the pressure test shall be repaired or replaced and the test shall be repeated until it is satisfactory to the Engineer.

C. Leakage Test:

     1. A leakage test shall be conducted concurrently with the pressure test.

     2. Leakage shall be defined as the quantity of water that must be supplied into the newly laid pipe, or any valved section thereof, to maintain pressure within 5 psi of the specified test pressure after the air in the pipeline has been expelled and the pipe has been filled with water.

     3. Maximum leakage during the pressure test shall not exceed the following value "L":

          Where: L =SD P/133,200 S = Length (ft)
          D = Diameter (in)
          P = Pressure (psi)

Example: for a 4000' length of 16" pipe, tested at 150 psi for two hours, the maximum allowable leakage is calculated to be: L = 5.9 gallons

     4. Acceptance of installation shall be determined on the basis of allowable leakage. If any test of pipe laid discloses leakage greater than that specified above, the Contractor shall, at his own expense, locate and repair the defective material until the leakage is within the specified allowance.

     5. All visible leaks, other than a minor amount of sweating, shall require immediate stoppage of the test and tightening of the joints so that, when pressure is again put on the system, there will be no leakage.