Sewer gas odors/smoke testing
Posted by Mike V. on July 08, 1998 at 20:12:38:
I work for a local health department,and just this week I have had 3 complaints concerning sewer gas odors. I have devised a testing method to determine if there is a leak (after checking all traps) using a tracer gas injected in the vent stack or upstream in the sewer main and a gas chromatograph to detect the gas even in the part per trillion range. This method seems to work to determine if there is some kind of leak. However, I cannot determine where the leak is located with this method.

I have heard of plumbers performing "smoke" tests on systems. However, I have been unable to locate a plumber locally. I am extremely interested in learning more about how this test is actually performed. Specifically, what type of smoke is used and where in the system the smoke is introduced.

Any information would be greatly appreciated. Replies can be either private at or on this BB.

Thank you.

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