minimum height for laundry standpipe?
Under UPC the laundry standpipe p-trap must be: 6" <= floor <= 18"
Q1: where is the measurement taken from w/ regard to the p-trap? In Peter Hemp's book it shows it as the connection point between the standpipe (above) and the p-trap (as opposed to the weir or dead bottom of the p-trap, to name to other obvious points of reference). Is Hemp's drawing correct?
Under UPC the laundry standpipe top must be: 18" <= p-trap <= 30"
Q2: is the aim of these two restrictions to end up with the standpipe at 36"? One interpretation would be that if the p-trap is 6" from floor, standpipe should be 30" from p-trap, and if p-trap is 18" from floor standpipe should be 18" from p-trap... this is NOT what the code says, but is that what it means to say?
OR to put it another way...
Q3+: what is the recommended height above the floor for the top of the standpipe? Should it be above the flood level of the washer (as I've seen mentioned in one resource)? Can it be "hidden" behind the machine (for aesthetics) or does it need/want to be above the machine?
Thanks for the accurate info.
I know this thread is a bit old and you may never read this, but thanks so much for actually quoting and referencing the applicable code. I spent several frustrating hours searching various forums and threads, finding lots of statements, but no code references to back them up. I am trying to figure out how to plumb in a washing machine in a daylight basement which is part of a large addition/remodel to my house. Originally the laundry was to be on the other side of the wall on the main level and the plumbing would have been easy, but we decided to move the laundry to the basement part way through the project. Unfortunately we are a few inches too low to put the trap in the wall easily. At least now that I am able to find the exact requirement in the 2011 Oregon Plumbing specialty code, I know the exact limitations I have to work around.
Originally Posted by Basement_Lurker