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View Full Version : Venting/Drainage a new Bathtub into an existing sunk in shower


ADFman
Mar 15, 2007, 07:25 PM
Okay, Basically. The sunk-in shower is obviously lower than the bath tub. And I wish to connect the new drain from the tub to the existing 2" drain from the shower. My question is: How would I go about venting (if needed) and connecting the new tub that is 4' away from the existing drain, Without, having any suction or backflow to the P-trap of the shower when we drain the bathtub?

doug238
Mar 15, 2007, 08:02 PM
The ideal way is to open the floor and simply move the trap to the proper place for the tub. 2" can travel up to 8 feet total and 1 1/2" can travel 5 feet from the vent. You probably have a 2" line, maintain that with a 2" trap and 1 1/2" riser

ADFman
Mar 16, 2007, 05:17 PM
Thanks Doug.