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chickenman1966

10:05PM | 09/27/04
Member Since: 09/12/04
3 lifetime posts
Bvplumbing
There is a septic type odour emanating from the drain in our kitchen sink. Even with water in the trap there is still the offensive odour. We thought we had found the problem in that the vent stack had not been connected when the house was built. Unfortunately the odor persisted even after we connected the vent stack which extends to the roof. We do not know what to try next.

Jim D

01:07AM | 09/28/04
Member Since: 01/06/01
342 lifetime posts
Chickenman1966 - hi, there could be several things causing this. Hopefully, you've read over some of the older posts in this area as this is a recurring question. I'm not a plumber, just a DIY'er, and I'm thinking your drain pipe may have some old food buildup above the trap. Also, do you have a built-in dishwasher and/or garbage disposal? Either one of them could be causing the smell.

I'd try using something to get rid of any possible "gunk" buildup in the pipe...it may not require Draino, it may only need a baking soda and vinegar mix to loosen the stuff enough that water will wash it away. (Get the dry baking soda down into the pipe, then pour in some vinegar and let the foaming action do its work...)

I believe you can safely use the baking soda/vinegar mix in a garbage disposal as well. Another item I've noted about them is to run COLD water into them when grinding up whatever goes into them, then run the COLD water another 30 seconds after turning the disposal off to ensure it's flushed out well.

I believe there's stuff out now to clean the inside of a dishwasher - you use it on an empty dishwasher and it'll help clean up the filters and flush the drain pipes.

I hope this gives you some help - good luck! Jim D/West Point, VA

LonnythePlumber

04:12AM | 09/28/04
I agree with Jim that the first direction is your dishwasher drain connection. The discharge hose should connect to an air gap fitting on your countertop or at least run to the top of the underside of your kitchen sink cabinet before connecting to your disposer. When the hose runs down from the disposer, then spoiled food waste accumulates.

If you had one fitting that was not connected you may have more. Most jurisdictions require the drainage/vent system to be filled entirely with water to the roof. That must not have happened in your case and there may be other connections that have not been cemented.


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