I am trying to route a drain and vent line for a new shower in my bathroom addition. The shower is located next to an exterior wall and the main sewer line enters the addition approx 2 feet away from the addition.
I would like to come up from the main sewer line with a 4x4x2 vertical sanitary tee. Another 2x2x2 sanitary tee would be approx 1 foot above the sewer line. The tee portion would pick up the shower drain/trap. The other portion would continue up into the exterior wall above for the vent. See attached drawing. Is this an acceptable way to drain a shower?
You do not show distances. If the weir(90) of the trap is within 6' of the sanitary tee and the stand pipe out of the 2" trap is less than a 20" riser...you should be fine.
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