The 4 inch horizontal branch from the T is carrying waste from 2 toilets, a shower, and 2 bathroom sinks.
Quote: Originally Posted by DSH135 When are you permitted to use a Sanitary Tee with a side inlet? I was considering using the 2 inch inlet on a 4x4x4x2 Single Sanitary Tee for the waste line from a shower/tub combo that is to the right of the main stack. Above this Sanitary T is the 4 inch vent that goes to the roof. This would be the easiest and shortest run from the shower for me. The other options I was considering were as follows: 1) use a 4x4x4x4 double sanitary tee and reducing the opposing branch with a 4x2 reducer. or 2) putting a second 4x4x2 single sanitary tee further down the stack and letting the shower waste enter here. 2 toilets, a shower, and 2 bathroom sinks are already connected to the stack ? Is the 4 to roof going to be the vent for the shower/tub. If so then use a separate sant├⌐ for the T/S. if the T/S has it/s own vent than better to add a 4 X 2 wye below existing tee instead of a santee But the T/S will be wet vented if below the lateral from other fixtures . If Tee from 2 toilets, a shower, and 2 bathroom sinks not connected yet best to use a wye. Or you can use a double fixture tee for both connections, NOT a Santee
depends on what the tee is catching?
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