A rancid odor coming from your sink drain may just be coming from debris in the p trap but if it smells like a sewer it probably means venting problems in your drain system.
My bathroom sink smells like sewer.
The most common reasons are a backed up sewer cracked or rotted pipes that leak clogged drains pipe connections are too loose the vent pipe is backed up or too short there is an old wax ring or a dry trap.
It is always a sewage like odor or rotten egg smell.
It blocks sewer gases trying to travel inside your house from the exterior systems.
While it may smell dangerous the sewer smell usually consists of problem that you can fix yourself.
When the vents are blocked flushing a toilet can create sufficient vacuum to suck water out of the trap and allow sewer gases into your home.
Sometimes it happens that the sewer smell in the bathroom comes from the sink.
Once you ve identified where the odor is.
Sewer smells in your bathroom can result from a few different issues so you ll need to spend a bit of time in the room to sniff out the source.
If the odor emanating from your bathroom sink smells strongly of sewage then sewage may be the actual culprit.
If the p trap is blocked or dry it would cause a sewage smell to emanate from the sink.
Bathroom sink smells like sewer.
The strong smell can quickly fill your bathroom with an unpleasant odor.
A sewer odor that emits from the bathroom sink drain can cause you to panic.
Determining the cause of the sewer smell can help you prevent it from returning in the future.
The possible reason is clogging of the pipe that leads to dry p trap.
It works by holding water at the bottom of the curve to block the gases from going the wrong way.
Sewer odor in bathrooms has several different causes.
What causes a sewer odor in the bathroom.
Remember all your water waste eventually drains to the same place so the runoff from your bathroom sink will be sharing a pipe with sewage down the line.
Like many others your sink probably has a hole at the top that allows fast drainage when the sink is full of water.