1. 

   JSS New Member

   Joined:

   Dec 5, 2020

   Location:

   West Virginia

   I have a 1.5" drain pipe for my washing machine that did not have a p trap. I went to add one and read that 2" is the standard now. It is going to be a big job to upgrade that and am wondering is it worth It? I also don't understand why 2" is required when the drain hose itself is much smaller.

    

   JSS, Dec 5, 2020

   #1
2. 

   Reach4 Well-Known Member

   Joined:

   Sep 25, 2013

   Location:

   IL

   See https://terrylove.com/forums/index.php?threads/washer-1-5-standpipe.80530/ #3

    

   Reach4, Dec 6, 2020

   #2
3. 

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