Can a 1 1/2" p-trap be used under a 90 gallon tub and then attach to a 2" drain line? The reason is to minimize the size of hole required to move the drain pipe between two floor joist. The previous tub had change a 2" p-trap.
I am also wondering if the vent for this line is ok at 5'6" because everything I read says 5'.
I am also wondering if the vent for this line is ok at 5'6" because everything I read says 5'.