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mskbstewart
Sewer smell in house following cool morning
mskbstewart

Over the past few years and always this time of the year (fall) we have noticed a sewer smell in a walk-in closet area of the house. It always seems to occur when the days are warm but the nights and mornings cool down significantly (We live in Ohio). Once the day starts to warm up again the smell disappears. Then when the daytime temperatures do not rise so high (late fall or winter), it's gone until the next year. We have had plumbers do smoke tests, inspect vent systems (from the attic, what they could see anyway) and snake sewer lines with no findings. The most confusing and frustrating part of this is the walk-in closet area where the smell originates has no plumbing fixtures whatsoever and sits over a concrete slab. We have spent thousands of dollars without any relief and we are at our wits end over this. Has anybody ever experienced anything like this or have any suggestions? It would be greatly appreciated!

dj1
Re: Sewer smell in house following cool morning
dj1

Can you tell us something about the floor of this walk in closet? What do you have over the slab?

ed21
Re: Sewer smell in house following cool morning
ed21

If you could figure out how the smell gets into the closet you'd be closer to a solution.
Could it be through: a light switch,fixture or outlet, crack in the slab, joint where the wall meets the slab.
It might take some sniffing when the conditions are right, but before the smell is overwhelming to find the origin.
I haven't heard of anything like this before. Good luck.

ed21
Re: Sewer smell in house following cool morning
ed21

Does a vent or sewer pipe run through one of the walls in the closet? If so I would take off the drywall on one side to check for cracks, bad joints, holes from nails, etc.
The only thing that comes to mind is that the warm weather tends to make sewer gases rise up through a pipe more,then the abrupt coolness tends to make the gases denser and heavier so they have a greater density than the surrounding air and find an opening to escape through. That being a wall of the closet and then the smell finds a way into the closet.
Since the smell isn't apparent all the time, I'm guessing the hole in the pipe is relatively small and only the certain conditions make it apparent.
A real puzzle. Now that I threw in my two cents, I can stop thinking about it. Let us know if you figure it out.

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