Originally Posted by Rlly001
I have a rough in for a shower which is right beside the main stack in our basement. The question I have is do I need an s trap? Or can I install a shower directly into it?
You have to pour water down that pipe and with a flashlight confirm that a part of the water stays there, if the water goes straight thru that means you don't have a trap below the floor, you MUST have a trap below the floor, you CANNOT hook up a shower without one!