This pipe is called a p trap.
Sewer smell from under bathroom sink.
Sewer odor in bathrooms has several different causes.
Bathroom sink drain has all the organic matter that flows down with the water.
If the odor emanating from your bathroom sink smells strongly of sewage then sewage may be the actual culprit.
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.
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.
A sewer odor that emits from the bathroom sink drain can cause you to panic.
What causes a sewer odor in the bathroom.
The strong smell can quickly fill your bathroom with an unpleasant odor.
Determining the cause of the sewer smell can help you prevent it from returning in the future.
While it may smell dangerous the sewer smell usually consists of problem that you can fix yourself.
Sometimes it happens that the sewer smell in the bathroom comes from the sink.
So you might ve noticed that there is a p or u shaped pipe under your bathroom sink.
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.
According to research the bathroom drain is the primary reason why bathroom sink smells like sewer.
The first possible cause of a sewage smell in your bathroom is by far the easiest to fix and more likely to occur in bathrooms where fixtures haven t been used recently such as the sink in a guest bathroom or the tub in a bathroom with a separate shower.
There is soap hair and used toothpaste spits.
The possible reason is clogging of the pipe that leads to dry p trap.
Like many others your sink probably has a hole at the top that allows fast drainage when the sink is full of water.
Once you ve identified where the odor is.
A smelly bathroom sink drain is a common problem as odor residue and bacteria accumulate regularly in the drain.
Luckily keeping the drain clean and odor free is a fairly easy task and requires only a couple of inexpensive household ingredients.
One end of the trap runs from the sink to the sewer system and the other end called the plumbing stack pipe leads all the way up through the roof all the gases and smells evaporate through the plumbing stack and the fresh air is let in.
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.