This drain (picture attached) does not drain efficiently. Looking at it I think it should have a Sanitary Tee instead of a Wye (in red rectangle) and that the drain isn't supposed to go from 2 inch to 1 1/2 inch (also in red rectangle). The vertical pipe (blue rectangle) is a vent; there is a...
Opened up a can of worms while trying to repair long term water damage. I tore up the subfloor to find a lot of rot and that the shower drain was probably originally intended for a tub (1 1/2 inch). There is very limited space to put in a trap for the shower and tie into the original 2 inch...
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