We live in the mountains of pa . I have a septic system ,we started smelling sewer gases and I replaced the two toilet rings upstairs I left the hole open in the ceiling just in case ,the smell has not gone away and is even more potent but comes and goes ,I have no gurgling or drainage issues that I can pin down ,there's a vent before the septic tank with no odor coming from it at all ,and pipes are clear ,my house is built on slab so no basement ,pipes all run vertically and tie in to flooer with a sweep connection into slab ,were do you think the odor could be coming from ,the tank has been serviced and we do use ridx

Where's the smell the worst? Before we can fix it we have to locate it. Back to you, Tom