HELP! Septic smell coming from one bathroom
We recently bought a new house and right before we moved in the septic tank was replaced. The old tank had tree roots in it and a new 1500 gallon tank was put in. For the past 3 weeks we have had bad septic smells coming from the downstairs half bath. We have had the wax seal replaced. We have had the vent pipe on the roof looked at (it was clean). We have had a giant hole cut in the drywall and what was thought to be a small hole in the vent pipe capped off. $1000 later and we are still getting the odors. Just in that one bathroom. Is it possible that there is something wrong with the tank installation? Would we just get odors (no sewage) and would it be confined to one bathroom. Please help!