All of the large black pipes in this image are waste pipes which lead to the sewer or septic system.
Kitchen sink smells like sewer.
If the smell is coming from a floor drain pour a pitcher of water down the drain to restore the proper function.
A typical sink trap.
You thought it was the sink drain but after working on it the problem is not resolved and still bathroom sink smells like rotten eggs.
Clogged venting pipes are why bathroom sink smells like sewer.
Sewer gases are escaping up the pipe due to a problem with the u bend.
Even when we diligently use a sink strainer or garbage disposal we work our kitchen sink drains hard.
This smell is leaking in from the sewer through the drain.
The smell is like rotten eggs.
Kitchen sink smells are easily fixed by unclogging blockages cleaning the pipes with a ready made chemical or home made solution or fixing the u bend.
The sink trap if you look under your kitchen sink you ll see a sink trap.
Waste and toilet paper.
Inevitably food particles grease and other not so lovely things make their way into the drain and we wake up one morning to a foul smell coming out of the sink.
Notice that they are all connected to one another even the sink a.
If the smell is coming from a sink simply run the water for a few seconds to restore the trap.
You ll usually notice the sewer smell during times of heavy water usage or if it s very windy outside because the gas is forced toward areas that it wouldn t normally occupy.
This usually happens at one of two places.
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.
This is not only irritating but it can also be a health hazard.
The sink trap or the plumbing vent.
If you are smelling sewer gas in your kitchen something has gone awry with the system.
Avoid this by flushing only items that are meant to go in the toilet.
After finding out whether the water was the cause of the sewer like smell probably you have realized this was not the cause.
When you smell sewer gasses coming from the area around your kitchen sink the smells are not only offensive but they can put anyone in the house at risk until the source of the sewer gas leak is found and taken care of.
Things like baby wipes.
The plumbing in your house is designed to contain harmful gases flush away sewage and provide you with clean and potable water.
This image shows a very basic household plumbing system.
You can do some activities yourself to find the cause and correct the problem before you call a plumber.