So called toilet vent should be connected to the sink and tub drain and goes out the roof, is the a add on bathroom?
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Not a plumber…
But sounds like you blew the wax ring plunging a downstream blockage. So your wet hallway came from the toilet which is a cheap fix. To know whats going on with the blockage, Id find out if someones been flushing wipes. To know for sure you’re gonna need a camera.
Good luck. Thats NO fun..
I'm missing something here, you in a single or two story house
Bonus room and bathroom upstairs.
But the problem is with with the downstairs flooring and master bath
This was all on the 1st floor. But I'm gonna do like you said and leave it for a week and see if anything still leaks.Did any of the toilets,tubs,shower,sinks down stairs back up, if no then the blockage may have been between the upstairs and downstairs. I know my upstairs bath, toilet, sink uses a 3 inch line then to the main 4 inch in basement for the whole house to septic. I had a similiar problen in the 3 inch line (upstairs plugged up, toilet and shower but a 15 ft snaking cleared it out. As far as water on your first floor , it flows down so maybe it was a wax seal upstairs, hopefully not a bad pipe in the wall. I'd leave what you cleared open a couple of days , let it dry out and keep an eye on it.
If you had a bad wax ring, tile floor on a slab, the water could still travel along the slab and you would not see it.