ajandchili
Jun 28, 2009, 07:50 AM
We are going to add a separate tub to a bathroom with an existing shower. The plumber plans to connect the tub drain in series to the existing shower drain. The tub would have a P-trap adjacent to its drain and then feed into a vertically oriented sanitary tee. The bottom of this sanitary tee would continue downward into a P-trap for the shower, and the top of the sanitary tee would continue upwards to the shower drain. The shower P-trap connects into an existing vented waste line about two feet away.
I don't have any plumbing experience, but after some reading I have at least three concerns with this plan: (1) the tub would seem to be double trapped, (2) the shower drain would seem to be a vent for the tub drain, and (3) when we drain the tub it seems like it could fill the shower temporarily. I think there needs to be two separate lines connecting to the existing vented waste line. The tub drain would be within 2 1/2 feet of the shower drain and 5 feet of the waste vent line.
A sketch is attached.
I don't have any plumbing experience, but after some reading I have at least three concerns with this plan: (1) the tub would seem to be double trapped, (2) the shower drain would seem to be a vent for the tub drain, and (3) when we drain the tub it seems like it could fill the shower temporarily. I think there needs to be two separate lines connecting to the existing vented waste line. The tub drain would be within 2 1/2 feet of the shower drain and 5 feet of the waste vent line.
A sketch is attached.