New or repaired water distribution mains shall be tested to a minimum hydrostatic pressure of fifty psi greater than the design pressure for the system or pipe class. Class 150 pipe shall be tested to a minimum pressure of two hundred psi. The duration of the test shall be one hour. All water mains with cement joints shall not be tested until thirty-six hours after the joint was made. All asbestos-cement pipe shall be filled with water for at least twenty-four hours before testing. Before applying the hydrostatic pressure, all entrapped air shall be thoroughly bled off. (Ord. 383 § 325, 1974).

For all types of water mains, there shall be no visible leakage at any point or section of pipe and the allowable leakage for the total lengths of all water main under tests shall not exceed the amount specified in following formula, L = ND (P)¹/₂ /3, 700, where L is the allowable leakage in gallons per hour, D is the nominal diameter of the pipe in inches, P is the test pressure during the leakage test and N is the number of joints in the length of pipeline being tested. (Ord. 383 § 326, 1974).

Tests shall be made by flowing fire hydrants of all new water distribution systems.
All tests shall be made in the presence of the county engineer or an authorized representative and no joint, valve, fitting or connection shall be completely covered until inspected and approved. (Ord. 383 § 327, 1974).

All new or repaired mains, pumps, tanks, wells and other facilities for handling potable water, before being placed in service, shall be completely disinfected in accordance with “Procedures for Disinfecting Water Mains,” AWWA C601-54. Every new water main and every repaired section of an existing water main must be given an application of chlorine between fifty to one hundred parts per million of chlorine in potable water. The new or repaired pipe and/or facility shall be thoroughly flushed before and after chlorination. If the first application of chlorine is not sufficient, the procedure shall be repeated until the water will meet the bacteriological drinking water standards as set forth in the United States Public Health Service “Drinking Water Standards.” Any other disinfecting procedure, if approved by the county health officer, may be used. (Ord. 383 § 328, 1974).