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We had a sewer'ish smell when we'd turn the faucet on on only one of our bathroom sinks. Someone told us to clean out the overflow prevention in the sink (the hole at the top of the sink). Did so and haven't had a problem since.
If it's only coming from one sink, it's isolated to that sink or its own plumbing (obviously).
After a while, buildup of personal hygiene stuff can develop an aroma.
Kind of a crud aroma. If the sink drains slowly, that may be the issue.
And, you may have a bad studor vent. Is the smell stronger in the cabinet when you open the doors?
Studor vents allow air into the drain system so the drained water doesn't create a vacuum and pull water out of the trap.
The dry trap will allow sewer gas to back up right into the room.
Studor vent has a rubber flapper in it that can dry out over time and not seal properly. That can be the source of the sewer gas entering the bathroom.
Studor vent replacement is a very easy DIY. $8-$15 in parts, and save a $100 plumber trip charge. Or, any handyman should be able to do it easily.
Just getting to it is often the difficulty, as it may be high in the cabinet, behind the sink.
I had to employ a series of colorful metaphors to access the one behind our kitchen sink, but it solved that issue.
If the sinks aren't used often it's quite possible the water block in the P trap has evaporated, allowing the smell to come up the drain. Just run water in the sink to fill the trap with water.
If the sinks aren't used often it's quite possible the water block in the P trap has evaporated, allowing the smell to come up the drain. Just run water in the sink to fill the trap with water.
If the sinks aren't used often it's quite possible the water block in the P trap has evaporated, allowing the smell to come up the drain. Just run water in the sink to fill the trap with water.
Thanks. I checked and we do not have air valves. I'll run some water in the sink.
I smelled the sink drain and it seems to be coming from there.
This is in a second floor sink that we rarely use.
I developed a habit to run water at least 30 sec once a month in any unused or rarely used drain. This will theoretically solve the “sewer gas” problem by keeping the water trap filled.
I developed a habit to run water at least 30 sec once a month in any unused or rarely used drain. This will theoretically solve the “sewer gas” problem by keeping the water trap filled.
Yeah. I think that's the answer. Run water and use that sink more. We don't use that bathroom often.
Sometimes the drain system vent pipes going up through the roof can get clogged with either debris or a small animal and have to be cleaned out to allow proper ventilation.
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