Usually the smell may be coming from the pipes laid into the wall to trash the used water.
Smell from kitchen sink when washing machine on. There are two main reasons why your kitchen drain may smell. You may have a plumbing issue and a potential health risk on your hands. Most washing machines are plumbed directly into a fitting on the u-bend under the sink these days instead of being pushed into a standpipe as above.
In this article we will explore the likely causes of sewer smells from washing machines and suggest how to cure them without calling a plumber. In most cases we have found that the above statement is often more accurately described as washing machine smells like rotten eggs when draining. Not all stinky sinks are food-related though.
Ours is plumbed as recommended which means it empties its waste into the pipework on the kitchen side of the soil trap so any odours come back into the kitchen via the plug-hole. So reckon smell is due to food and crap being washed down the sink more than anything else. And over time bacteria will cause it to decay and smell.
Sulfur smells like rotting eggs or a really nasty fart. After youve washed your dishes and utensils you need to sprinkle baking soda into your kitchen sink. The hose must at some point be equal to the top of the machine to prevent debris from the sink entering it and also to syphon the last of the water when it empties.
Sometimes a blocked drain or faulty vent is not behind the awful smell in your kitchen. You need to find out first. So what you should do is to take small measured breaths and try to single out the smell with your nose.
The Evil Greebo. It can quickly accumulate and cause some pretty bad smells. My kitchen sink kept taking ages to drain and I thought that there was a blockage sometimes the smell was horrendous too.