We have a sewage smell in our basement that we finished and added a bathroom. It has an ejector pump and we have sealed off the crock top with caulk and wax. The smell is not all the time and is very inconsistent. We have city sewage. We have tried everything with not luck. The only thing that we can find a pattern from time to time is when it rains quite a bit, but even that is not always the case.

We also have our gas heater down stairs that sometimes smells also because the exhaust venting is almost level with the ground and should be at a 45 degree angle, however that smell is different from sewage and is not in the same area as the ejector pump.

Does anyone have any ideas on how to handle this? Thanks,