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-   -   drain pipe size for kitchen sink, garbage disposal, and dishwasher ? (http://www.diychatroom.com/f7/drain-pipe-size-kitchen-sink-garbage-disposal-dishwasher-10333/)

amakarevic 07-31-2007 09:57 PM

drain pipe size for kitchen sink, garbage disposal, and dishwasher ?
 
should i use 1.5 or 2 ?

thanks,

- a

slakker 08-01-2007 01:51 AM

I have 1 1/2" in my home... I think most of the fittings are designed for this size drain...

Mike Swearingen 08-01-2007 04:37 AM

1.5" for sink drain, 2" for shower drain.
Mike

bigMikeB 08-01-2007 05:52 PM

If it was my house I would use two inch for the branch and the vent and 1 1/2" for the trap arm from the wall out, staying with pipe size and not dropping to tubular execpt for the tailpieces.

MechanicalDVR 08-04-2007 10:47 PM

We use glue up pipe size LA traps instead of tubular as well, they are more ridgid long lasting. The 2" is a good idea if it is already there but, I wouldn't rerough just to up size.

Ron The Plumber 08-05-2007 12:23 AM

Code requires KS drain line to be 2" after the trap arm.


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