In one- and two family dwellings, is the outside piping tested to the same test pressures as the inside piping?
The code allows different testing pressures and duration of test, depending on the water column or working pressure in the line. The working pressure is usually higher between the first and second stage regulators and lower after the second stage regulator. The test on the low side is 10 PSI for 15 minutes below 14 inches of water column. The test on the high side is 60 PSI for 30 minutes. See Section 2603.3.1 in the Dwelling Code .
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