Sewer smell coming from bathroom sink

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Old 03-29-02, 12:57 PM
oldbarn
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Sewer smell coming from bathroom sink

I have tried several things and I am still getting a bad sewer ordor from the sink. I need some more ideas before I call a plumber. First I tried some Drain Care - did not work! Next I tried some bleach - Did not work! Then I checked the vents on the roof and they don't appear to be clogged. What else can I do?
 
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Old 03-29-02, 03:35 PM
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Assuming that it is sewer gas odor, the only way you should be able to smell that would be if the water in the trap was either leaking out or being sucked out (bad venting). Next time you get the smell and before doing anything else, put a bucket under the trap and remove it to see how much water you get. You should be able to judge by the amount if enough was there to have been stopping the smell from coming back up the drain or alternately, slowly pour about a cup of water down the drain to see if it stops the smell.
 
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Old 03-29-02, 03:37 PM
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Had an afterthought, if your sink has an overflow the smell may be coming from some gunk in there decomposing. Try getting some bleach or cleaner in there too.
 
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Old 03-29-02, 06:47 PM
oldbarn
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Originally posted by the_tow_guy
Assuming that it is sewer gas odor, the only way you should be able to smell that would be if the water in the trap was either leaking out or being sucked out (bad venting). Next time you get the smell and before doing anything else, put a bucket under the trap and remove it to see how much water you get. You should be able to judge by the amount if enough was there to have been stopping the smell from coming back up the drain or alternately, slowly pour about a cup of water down the drain to see if it stops the smell.
Done everything including cleaning out the overflow from your other message. 1) Pulled off the trap a got about 6-7 OZ of water probably enough to fill the trap. I stop up the sink and the overflow whole and fill up the sink with water and the smell goes away (naturally). What other reason could the smell be getting by the trap?

When I disconnected the trap and put it back, I thought the smell went away, but it is back. The smell is not as bad as it was before.
Thanks for the help!
 
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Old 03-30-02, 01:14 AM
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Cool

You apparently have a smelly algae build-up inside the sink overflow.
Sometimes it takes more than one dose of bleach or DrainCare to eat it out overnight and then flush with hot water.
Try removing the drain stopper, dry the drain with a paper towel, and duct tape up the overflow hole down in the drain. Use a funnel and fill the sink overflow with bleach or DrainCare.
Let it sit overnight.
Remove the tape, and flush the overflow with hot water.
Where there's a will, there's a way.
Good Luck!
Mike
 
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Old 03-30-02, 07:25 AM
oldbarn
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oldguy - Sounds like you nailed it.

oldguy - I am trying what you said as I type. This makes a lot of sense. The real problem is going to probably turn out to be, I hardly ever use that sink (I can't remember when the last time I ran water in it - Could have been months) and it is letting me know. I think your suggestion is going to work and to prevent further problems if this works, I am going to run water in this sink once in a while to prevent an algae build up or what ever it.

Thanks oldguy and the_tow_guy for the help!

I have a feeling that after a few days of maintenance things will be back to normal. I will post then with a update.

Thanks Again! Excellent Forum.
 
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Old 03-30-02, 12:03 PM
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Also, using the sink occasionally will keep the trap filled with water, otherwise it eventually evaporates.
 
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Old 04-06-02, 10:59 AM
oldbarn
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Success odor gone

Success with tips from the oldguy and the_tow_guy my bathroom sink is now odor free. I put some drain care and X14 cleaner down the sink overflow. It took a few days but it finally cleared up. It must have been some build up in the overflow that started to decay. I had to be patient it took a few days to clear up. Note Pinesol helped mask the odor until it went away. Thanks oldguy and the_tow_guy, I am just now responding to my previos post from last week.
 
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