tbowker Posted September 16, 2006 Report Share Posted September 16, 2006 I came across this a couple of days ago on a house that's 10 years old...this is the only vent stack on the house and it's completly sealed....would'nt you think that the interior would start smelling bad? Download Attachment: Ventcap.JPG 39.72 KB Link to comment Share on other sites More sharing options...
fqp25 Posted September 16, 2006 Report Share Posted September 16, 2006 Maybe they want to trap and use sewrer gas as an alternative fuel source. Was there a washing macine gray box? Those usually suck the p-trap dry. Link to comment Share on other sites More sharing options...
Erby Posted September 16, 2006 Report Share Posted September 16, 2006 Water will drain, but slowly and reluctantly with the sytem gurgling as it pulls air from other sources. I see that a lot around here in some of the newer developments (15 years newer??). Plumber just never went back and removed the cap after the pressure test. Link to comment Share on other sites More sharing options...
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