diymom
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Hi - this is my first posting. We are installing a bathtub in our remodeled bathroom that previously had no tub, just a shower stall. We are keeping a separate walk-in shower and adding the bathtub adjacent to it. There is no room to connect the new tub drain line to the the main drain line because the shower drain and the bathtub drain in the bathroom next door leaves no space for an attachment. Could we run the new tub drain across the floor to the sink drain and vent? The sink drain and vent are 2'' - could we have a 4" tub p-trap and drain line and attach it via a sanitary tee to a 2'' drain line below or above the sink attachment to the drain? The reason I ask about a 4" pipe is because the distance from the new tub p-trap to the vent would be 82". which is too far for a 2" or 3" pipe. I hope you can understand the problem. Thanks so much for any help!