** My Apologies, this obviously shouldn't be here. Admin pease delete. I'll repost in the right forum.
We're moving our laundry to the second floor. I understand (I think) the requirements for a vent, specifically allowing air into the system to break the vacuum that could drain the p-trap.. However, in the case of a laundry pipe won't the air go in directly from the top of the pipe? I don't see how to vent this drain since it's an open piece of pipe.