What is the appropriate test pressure when testing LPG piping systems in a one- and two-family dwelling?
If the house piping is on the low side of the second stage regulator, the test would be 10 PSI for 15 minutes. A building official could approve an alternative method if requested by the contractor. NFPA 54 allows 1 times the working pressure, but no less than 3 pounds, and is an acceptable alternate. Air pressure testing at the reduced pressures allowed by NFPA 54 requires the use of a manometer or similar testing devise with comparable accuracy. OMSC has the same requirements as found in the Dwelling Code and allows the use of NFPA 54 in the exception. (The requirement stated above for the OMSC is a new amendment, which goes into effect Oct.
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