Forum Title: Pressure or smoke test
I have a small leak somewhere in my drain (ABS) piping and I'm considering doing a smoke or pressure test to try to find it. I know that I need to plug my vent stack to do this but what about the drain? Is there a trap where the main drain line exits the house that would allow me to do this or do I need to find a clean-out and use an inflatable test plug? Any advice is greatly appreciated. Thanks.
Category: Plumber Post By: RICARDO WADE (Mankato, MN), 07/28/2016

The leak is a sewer gas smell. I'm not a professional so I suppose I will need to call in a pro for a smoke test. I don't know how I would do that as a DIYer.

- CINDY LAWRENCE (El Monte, CA), 09/11/2017

Quote: Originally Posted by ganning I have a small leak somewhere in my drain (ABS) piping and I'm considering doing a smoke or pressure test to try to find it. I know that I need to plug my vent stack to do this but what about the drain? Is there a trap where the main drain line exits the house that would allow me to do this or do I need to find a clean-out and use an inflatable test plug? Any advice is greatly appreciated. Thanks. Your question is somewhat vague. How do you know you have a leak? Is there water showing somewhere? Follow the water back to the leak. Is the leak a sewer gas smell? Then smoke it.

- KENT HARMON (Davie, FL), 09/22/2017

Do a smoke test and do it from the vent on the roof you won't need to plug anything the smoke will come out where it's leaking I've done a lot of these and never had to plug the drain a water test you would need to plug

- ISAAC SIMON (Alpharetta, GA), 09/26/2017

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