John L

04:22PM | 10/31/02
Member Since: 10/06/02
4 lifetime posts
When I first turn the water on in my double bowl kitchen sink I get a sewer smell for a few seconds then it goes away. It seams like when the water goes down the disposal side it forces the vapors out the other drain. There are 2 vent caps under the sink. Where do I start. I poured bleach down the drains and it seemed to help. They flow pretty freely but look like there is a slight uphill grade from the disposal to the sinks and then on to the main. Might this be the problem???

erik peterson

12:42PM | 06/26/03
Member Since: 06/23/03
223 lifetime posts
Sounds like your air-gap for d/w is dirty...when your sink drains it exerts a little back pressure on the air-gap sending the smell into the area...disassemble and clean, if you cant do that use bleach down the air-gap. erik

plumber Tom

07:41PM | 06/26/03
Member Since: 05/10/03
801 lifetime posts
Make sure your trap is holding it's seal. With your type of sink you should have what's called a continuous waste. That is either a center outlet, or a end outlet. If the trap is not pitched properly, then that might explain the sewer gas smell. You should alway's have water in the "J" bend of the trap.


10:59PM | 07/15/03
Member Since: 07/15/03
9 lifetime posts
The previous two posters are spot on and I can only reiterate that the J bend MUST have water in it to prevent those nasty odors from rising into your kitchen. FURTHERMORE, it is essential to make sure your garburator is used properly, i.e., ensure that all waste food particles, including chicken bones and the like, are completely and totally ground up and flushed to drain. Ensure that the garburator is SWITCHED OFF and remove the rubber splashgaurd from the sink drain and inspect the grinding area of the garburator - use a flashlight if necessary - you should be able to see the grinding teeth - make sure there are no particles of unground food there. If there are, then this could easily be the source of the nasty smell. Also, while the splashguard is removed, it should be cleaned of any gunk which may have accumulated. Make sure, each time you use the garburator, that all food particles are COMPLETELY ground up and flushed to the drain. About once a week, it is good practice to flush the garburator with baking soda - plug up the sink hole and about half fill your sink with warm water. Add about a cup of baking soda to the water and stir to dissolve. Switch on the garburator and IMMEDIATELY revove the sink plug. Continue to allow the garburator to run as the sink drains switching it off only JUST before the sink completely empties. This will ensure that the garburator has been thoroughlly rinsed with the baking soda and will eliminate all odors that may be lingering. Hope this helps
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