What could be causing a smell coming from under the kitchen sink?
For months now we have smelled a funny odor under the kitchen sink, it’s a new home on a slab, it has an aav valve a dishwasher and disposal, I have cleaned all those things well no improvement. It gets worse at times like I think when it’s a heavy rain or when we have guest using guest toilet and shower...I replaced the aav valve 2x thinking maybe it was faulty...I capped the aav valve to see if the odor would stop but no change, we put silicone to seal off the exposed concrete where the pipes come up from the ground thinking maybe the earth below was somehow causing a smell...it didn’t help! We are at a loss! The other day my husband flushed the toilet in guest bathroom and I heard it under the kitchen sink where the aav valve is..that makes me suspicious...we have a grinder pump that connects to city sewer..
Can you contact the plumbing contractors who installed your plumbing? They would be local and may be your best option for figuring this out. No one likes to call a plumber but they can get things done fairly quickly in comparison to a homeowner trying numerous options.
check to see if the odor is coming from the space where the pipe goes down (looks like a square hole). If you are on a slab, there could be something there causing the odor, like humidity. Try putting a cloth or rag stuffed in the hole to seal it up (sort of) and see if that stops your odor. if that does the trick, you might be able to use a square piece of plywood with a hole in it to go around the drain pipe...that would seal it up.
I agree - contact your builder to have this repaired properly. Their work should be guaranteed for a period of time.
You need to contact your builder! I would imagine you paid a lot of big dollars for your home. They need to be accountable for their work! I know sometimes it feels like you are being the "bad guy" but I think if it was the builder in the same situation they would be calling their builder!
Contact the builder, if they do not help call your city sewer department and see what can be done. This is not right, that sewage is getting under the kitchen sink.
Contact the builder as everyone suggests. There is something wrong with the plumbing.
Plumbing systems have vents , maybe yours is blocked ???
Hi Reb, Contact the builder of your home and explain your situation with the smell beneath your sink. Inquire nicely if they can offer any advice for you and keep the conversation going that you are very concerned about the possibility of sewer gas and ask for their help. Most home builders do not want the liability of an unhappy homeowner who might have cause for filing a law suit.
Best results are a win-win for you and the builder with a happy homeowner and a builder has followed up on home construction problems.
A clogged pipe :) or if the wood has gotten wet from a leak.
Do you live in Canada by any chance? If so, you can contact CBC with your story, and they may air in on their program Go Public.
I have had the same problem. New build, but house sat empty for at least a year due to Covid and failed contracts. Drainage/ grading problem in my yard, that finally got fixed, odor worse with damp or rainy weather. Have had an independent plumber out to put a camera down the drain, but no crack or defect, odor coming up from around the pipes, and there is no sealant around the pipes. Going round and round with the builder, concern of moisture under my slab. So frustrating.