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Is this actually a sump pump? (for ground water) or is this actually a sewage pit?
If this is a sump, the only may have a sewage smell, would maybe stagnant water, sitting in the sump basin, Your idea with bleach would be a good approach, you may wan t to take a shop vac and suck the pit dry, then fill the basin with water again and add some bleach. If you still have the problem i would suggest using a sealed lid (cover for the pit)
you have a lid? or a sealed lid? a sump pump usually has a u cut in it for the discharge pipe which would not be sealed
If it has bolts on it its probably a seweage pit
and there is a gasket that is supposed to be between the lid and the pit to seal it
If it is a bolt down (sealed lid) the gasket is not there, or the gasket is bad
You can fix this by using silicon on the bolts and the rim of the lid
It sounds like this is a sewage ejector pit and the seal is not there or is bad thats why you have the smell, seal the bolts and the rim with silicon
Also where the discharge pipe leaves the pit lid, and where the power cord leaves as well
any break in this will cause the sewer mell
No matter what you have a sump or sewage pit you say it has a sealed lid, There has to be a bad gasket if is truly a sealed lid (no holes where you can look into the pit without un bolting the lid) then you just need to caulk the rim, bolt holes, and pipe's with 100% silicoln
Do you have a sewer pipe in your basement that go's out the sidewall about chest levl? or at least above the basement floor? im talking about the sewer not your sump pump?
with a u cut out around the discharge pipe? meaning you can look into the pit throught the u without removing the lidd
and the lid you can just pull off, its not bolted down?
ok your right its just a sump pit
again you should not have any sewer smell, i would first shop vac the pit out, then add some water with a hose again and add bleach
Then if you still have the smell maybe add a sealed lid with a gasket or silicon
You should not have sewer gas so yes it is possible you have a sewer break and its going into the foundations draining system
which ends up in your sump (and thats the smell)
If everything is flushing good (plumbing) i would just seal the lid, I have not seen a sewer break result in what your describing (but that does not mean thats not where its coming from)
Try what i suggested, but if it ends up down the line that it is a sewer break, you looking at a tractor digging up your yard (would have to be just outside the foundation wall or it would not end up in the sump) probably a $1000-$2000 job
I would think you would see backups if that was the case
seal it first
If the line has collapsed you should have backups, just make sure you seal the lid first, if you have backups from the sewer i would suspect a pipe breakage or collapse
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