No leak detection is required
if the suction
piping has:
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If a suction line is to be considered exempt on the basis of these design elements, there must be some way to check that the line was actually installed according to these plans.
If a suction line does not meet both design criteria stated above, one of the following leak detection methods must be used:
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The line tightness test must be able to detect a leak at least as small as 0.1 gallon per hour. Ground water, vapor, and interstitial monitoring have the same regulatory requirements for piping as for tanks.
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