duc24101986
New Member
I am trying to add a stand pipe for washing machine in basement. I will also add AAV for venting. Should I choose 1.5" or 2" drain for stand pipe. ? Curently there is 1.5" Y fitting to 2" drain underground
The current 1.5" drain is coming from kitchen sink on the main floor, and going to 2" drain underground
This is drawing of plumbing layout Image
The current 1.5" drain is coming from kitchen sink on the main floor, and going to 2" drain underground
This is drawing of plumbing layout Image