Wolf865
Member
Have a condo and the adjacent condo is just a mirror image of ours regarding the floor plan. We discovered a water leak that has obviously been going on for a very long time but that's for another post. When I removed our toilet to check to see if it was the source of the problem I discovered that when the other condo flushes their downstairs toilet, it fills our toilets pipe to within about 5-6" of the flange before it begins to drain back out. Probably does the same to theirs when we flush. Plus over the course of the day the more they flush the lower the water level in our bowl gets. Does the same to theirs. It finally reaches a low threshold where it will stop stealing our water and fortunately is still high enough to prevent sewer gas from entering. My assumption is that there's just a U shaped pipe between them and a T connector somewhere in between that leads off to a shared drain line. Doubt there's a solution to this other than digging up the concrete and putting in a Y instead of a T but what are the other consequences I might be overlooking? Since it only came up as high is it did when there was no resistance on my side, any chance it could be compromising the toilet flange and developing a leak at some point down the road? I've replaced the gasket already when we upgraded the toilet but the flange is below floor level by about 1/3" to 1/2" and cockeyed to boot. Prob going to replace with an Oatey Twist & Set Flange to bring it flush with the floor (or should it be above floor level?) once I build it up with some thinset.