Maximum horizontal distance from p trap to shower drain. To answer the original question, I don't know the distance to trap max but it depends on the piping size. How to identify and correct a venting problem with a shower drain. (4). Oct 18, 2005 · I've been reading that the max length of a shower trap arm is 60" before the vent. Ideally, it should be as close to your shower inlet as possible. The drain from my kitchen sink's disposal drops straight thru the floor and the P-trap is in the basement running just below the joists. Can I extend the distance between the shower drain and the P-trap if I have a large bathroom. 08K subscribers Subscribe (a) 1 000 mm in the vertical plane, and (b) 3 m in the horizontal plane. Jul 27, 2025 · In addition to this rule, P-traps must be no more than 5 feet away from the shower drain. 8 inches (300mm), and you can even cut the pipe to adjust the horizontal distance if you need to. uctjbf kwcnpf liwo jlubbg blcp vzwumnd cvvl siic vjeqfr wqjkb