Re: Drain & Vent for Kitchen & Washer?
Posted by Chris on February 22, 2004 at 15:14:33:
In response to Re: Drain & Vent for Kitchen & Washer?
IRC allow 1-1/2" drain lines for both a laundry tub and a kitchen sink; UPC wants 2" for both. Your local codes may vary. Both codes allow a 1-1/2" trap, but UPC wants 2" lines beyond the trap arm.

Going up to 2" seems prudent, as it will give you less clogs, better venting, and isn't a great deal more expensive. 1-1/2" vents should work fine on both.

Please note that I am not a professional plumber; my experience is limited to replumbing three old houses that my wife and I bought, fixed up, and lived in.

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