Hey,
I can't figure out this problem. I'm attaching a few pictures 1)diagram of my plumbing system 2) picture of the main stack leaving the house 3) picture of the main stack in the basement.
Previous owners installed a half bath in the basement. Toilet bubbles up whenever the 2nd floor toilet is flushed. It only happens when the 2nd floor toilet is flushed. The basement toilet does not get backed up and flushes fine.
I can't figure out if it is a partially clogged drain from the house to the street or just bad designed from the people who installed it. (I guess it could be a combination of both) My guess is, the large amount of water from a toilet flush is just too much for the "T" section at the bottom of the stack and the air pressure is getting pushed into the down stairs toilet.
There is only one vent and that is the vent stack itself. I wonder if a new vent situated on the opposite side of the "T" from the main drain would alleviate the problem. Running a new vent from the basement all the way out the roof would be a nightmare project.
I wonder if venting IS the problem, could I create some kind of loop vent that ties back into the main stack somewhere along it's horizontal.
Please help, I don't know where to start.
Thanks,
Bryce
I can't figure out this problem. I'm attaching a few pictures 1)diagram of my plumbing system 2) picture of the main stack leaving the house 3) picture of the main stack in the basement.
Previous owners installed a half bath in the basement. Toilet bubbles up whenever the 2nd floor toilet is flushed. It only happens when the 2nd floor toilet is flushed. The basement toilet does not get backed up and flushes fine.
I can't figure out if it is a partially clogged drain from the house to the street or just bad designed from the people who installed it. (I guess it could be a combination of both) My guess is, the large amount of water from a toilet flush is just too much for the "T" section at the bottom of the stack and the air pressure is getting pushed into the down stairs toilet.
There is only one vent and that is the vent stack itself. I wonder if a new vent situated on the opposite side of the "T" from the main drain would alleviate the problem. Running a new vent from the basement all the way out the roof would be a nightmare project.
I wonder if venting IS the problem, could I create some kind of loop vent that ties back into the main stack somewhere along it's horizontal.
Please help, I don't know where to start.
Thanks,
Bryce
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