we started noticing an occasional sewage smell in the basement. It comes and goes. I can't figure out its cause or source. I suspect it is somehow tied to the sump pump. The sump pump was replaced by roto rooter around a year ago. When I was there investigating, I moved a small rag and discovered to my surprise a big hole in the cover where the power cord is coming from.
Is this hole suppose to be sealed somehow? If I look inside I can see water. I imagine that could be the source of the smell.
Best Answer
I am Guessing this a sewage pit/ sump Based on the size and that there are 2 pipes and in that case it should be sealed and there should be a gasket under the lid. I have seen pits with a float and a stick that were not a tight seal and when a toilet flush or running water there was a smell until the pump kicked in. I installed a internal sensor that measured the distance to the water level where the stick was and eliminated the smell totally by sealing but they still had a high level indicator.