Piping Hydrostatic Testing Clause Samples

Piping Hydrostatic Testing. .1 For all piping, the test medium shall be clean, fresh, potable water. Following testing, the water shall be drained immediately and, if necessary, the system dried by blowing with air. .2 Unless otherwise indicated, the test pressure shall be 100 psig or 1 ½ times maximum allowable working pressure, whichever is the greater. Unless otherwise indicated, test pressure shall be held for a minimum total time of 2 hour with no noticeable loss in pressure while all joints are visually inspected for leaks. Water temperature shall not exceed 100 degrees F. After pressure is applied, the pressurizing device must be disconnected during the inspection period. .3 Where new piping connects to existing piping, Contractor shall flush, test and clean the sections of existing piping sections which include the new tie-ins.