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Question DetailsAsked on 10/5/2016

terrible odor coming from master bathrm like old urine? but not rotten eggs could it still be sewer gas?

the home was built in '74, we have replaced the toilets in home, it has septic. we moved in 3wk ago, and keep noticing this odor, it is getting stronger... tonite i opened the door of the bedroom and it about knocked me over it was so strong we covered tthe shower drain with a towel and the two sink drains with plastic. the floor in the bathroom is tile, we just replace the floor in the bedroom it is completely new

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Possibly - make sure all drains (and floor drains if any) have water in them, and check basement/crawlspace for any leaks.

Certainly putting plastic over the drains (assuming taped down) and ventilating the bathroom for several hours, then letting sit with door closed should tell if it is odor coming up through drains or not.

One other possibility is if you have air vents under the sink cabinet on the sewer lines - they commonly fail to work one-way like they are supposed to, but normally smell would be hydrogen sulfide (sulfur smell) or rank sewage smell, not just urine.

Sound like normal case of bad or wrong thickness wax seal (or used one of those new-fangled contraptions to replace the seal - commonly ineffectively), so you are getting leakage under the toilet. Commonly around $90-150 for Plumber to remove the toilet and check under for wetness/leakage and (assuming minor leak or none) repklace the toilet with new seal.

Note - if you have two toilets back-to-back could be coming from the other one, leaking under flooring and wall into this one.

Oh - you said you replaced the toilets in the home, but moved in 3 weeks ago - so a leaking toilet seal sounds like the most likely culprit for certain. Especially if the tile goes in under the toilet - so the gap between the sewer pipe flange and the toilet base is morte than normal by 1/2-1 inch or so - that takes a "tile" or "thick floor" wax seal. Also possible the wax seal got dented or misplaced during putting the new toilet in so it is just leaking out the edge.

Depending on what is under the toilet, you might be able to open a hole in the ceiling to look up under and see/smell if there is a leak problem - though it is possible, depending on where the leak is, for it to be just under the toilet on top of the tile and not leaking down under if in small quantities. Try wiping around the toilet base and see (assuming not fully caulked - most pro plumbers/tile setters leave a gap in the base caulk at the back to show wax seal leaks) if there is dampness coming out from under the toilet base. If a contractor installed the toilets, you might call him back to check if the wax seal is leaking - and if so, service call and cleanup and new seal and reinstallation should be no charge to you.

Check also for loose toilet - is it rocking at all when you sit on it - commonly when a new wax ring is put in the mounting bolts have to be snugged down again in a week or two to take up the slack from the seal compressing under the toilet. Should be just snug - only slightly tighter than hand-tight or pliers tight - reef on them at all significantly and you can break the toilet casting.

Answered 3 years ago by LCD

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