New Posts New Posts RSS Feed - P trap for dishwasher?
  FAQ FAQ  Forum Search   Events   Register Register  Login Login

Topic ClosedP trap for dishwasher?

 Post Reply Post Reply
Author
lebrunc View Drop Down
Newbie
Newbie


Joined: 10-Aug-2003
Location: Ottawa ON Canada
Points: 6
Direct Link To This Post Topic: P trap for dishwasher?
    Posted: 27-May-2004 at 5:45am
I removed my old diswasher and found a p trap on the discharge line. I will be moving some plumbing around so do I need to put in another p trap? I should mention that the discharge line is on an end run. The dishwasher is the second to last item in the run before the sink itself which is the last item in the run.
Back to Top
PLUMBILL View Drop Down
Senior Member
Senior Member


Joined: 02-Mar-2004
Location: Eau Claire, Wisconsi
Points: 181
Direct Link To This Post Posted: 27-May-2004 at 11:59am
Yes, you need to replace that P-trap and stand pipe if you are going to keep your dishwasher.
Back to Top
breplum View Drop Down
Newbie
Newbie


Joined: 23-Aug-2002
Location: lafayette CA
Points: 9
Direct Link To This Post Posted: 28-May-2004 at 7:52am
The uniform plumbing code requires dishwasher drain hoses to run into a dishwasher air gap. The code is there to protect health. A DW airgap fitting provides the only positive prevention of sewage backing up into the dishwasher. P-traps do not prevent this situation.
The air gap, mounted properly and piped correctly, will provide a truly safe installation.
Back to Top
PLUMBILL View Drop Down
Senior Member
Senior Member


Joined: 02-Mar-2004
Location: Eau Claire, Wisconsi
Points: 181
Direct Link To This Post Posted: 28-May-2004 at 11:33am
Our State Plumbing Code use to require air-gap's but has been up dated almost like Illinois to permit air-breaks for the dishwasher drain hose and no cases of backflow have been reported since change.

We use to require 2" vents for water closets but we up dated to permit 1 1/2" for two water closets. Does UPC Code still require 2"?

Back to Top
 Post Reply Post Reply
  Share Topic   

Forum Jump Forum Permissions View Drop Down