(A) Hydrostatic test.
(1) The newly laid water mains or any valve sections of it shall be subject to a hydrostatic pressure test of no less than 150 pounds per square inch (PSI).
(2) Duration of each pressure test shall be for a period of not less than two hours for pipes with uncovered joints and not less than six hours for pipes which have been backfilled before tests are made.
(B) Procedure for test. Each valved section of pipe shall be slowly filled with water and the specified test pressure shall be applied by means of a pump connected to the pipe in a satisfactory manner. The pump pipe connection and all necessary apparatus, including gauges and meters, shall be furnished by the contractor. Before applying the specified test pressure, all air shall be expelled from the pipe. To accomplish this, taps shall be made, if necessary at points of highest elevation, and afterwards tightly plugged. All exposed pipes, fittings, valves, hydrants, and joints shall be carefully examined during the open trench test. All joints showing visible leaks shall be repaired until tight. Any cracked or defective pipes, fittings, valves, or hydrants discovered as a consequence of this pressure test shall be removed and replaced by the contractor with sound material, and the test shall be repeated until satisfactory to the Village Engineer.
(C) Permissible leakage.
(1) Suitable means shall be provided by the contractor for determining the quantity of water lost by leakage. The leakage test shall be conducted after satisfactory completion of the pressure test before being acceptable.
(2) Allowable leakage shall not be greater than that computed by the following table. (Allowable leakage is shown in Gal./hr/1,000 ft.)
Diameter of Pipe | Allowable Leakage | Diameter of Pipe | Allowable Leakage |
6" | 0.55 | 18" | 1.66 |
8" | 0.74 | 20" | 1.84 |
10" | 0.94 | 24" | 2.21 |
12" | 1.10 | 30" | 2.76 |
14" | 1.29 | 36" | 3.31 |
16" | 1.47 | 42" | 3.86 |
(3) Leakage is defined as the quantity of water to be supplied in the newly laid pipe and any valved section of it necessary to maintain the specified leakage test pressure after the pipe has been filled with water and the air expelled. The test pressure shall be maintained on the hourly basis minimally or at intervals directed by the Engineer.
(4) Flanged pipe shall be "bottle tight".
(Ord. 07-57, passed 12-17-2007)