Smell from Kitchen Soil Stack!

[Diy592]

I looked at the blanks that I can see and they are sealed.
I am going to seal the base of the pipe with fire rated expanding foam to see if this reduces the smell.

 

[Diy592]

I have now narrowed this now with testing.

Smell only occurs after running hot water down kitchen stack (I think the shower may have been a red herring).

Smell can occur randomly that’s make me think it’s when one of the dwellings below runs hot water.

 

[Ric2013]

Hot water will cause the goo in the pipework to release smells which should be contained within the pipework. You either have a design fault with the way the pipework has been made with the result that a trap is letting air through it, or the pipework is not airtight for some reason.

 

[Diy592]

Just an update, Smell much better/gone after foaming up around the base of the soil pipe. Thanks for advice.

 

[Ric2013]

Worth letting the neighbour downstairs know there is a problem? Probably you'll now find the smell will now go into neighbour's house instead!