David in Va
New Member
I have a laundry sink with 1 1/2 inch PVC pipe that hooks about two feet over to a sanitary T fitting (lower end to 2 inch drain pipe in basement floor, PVC 2 inch vent goes up to the roof - the vent also serves, through take-offs higher up, a shower drain and I believe also a toilet drain. It's all original installation, and no problems with any of it.
I would like to add a 2 inch standpipe for our washing machine right next to the laundry sink, and noticed this picture in a book on plumbing codes as an example of one way to handle this kind of situation. In my case, actually, the standpipe would be just after the sink attachment (rather than before, as in this photo), and I would replace the present 1 1/2 inch piping and fittings back to the 2 inch PVC vent and drain pipe with 2 inch PVC. Does this in fact show a code-compliant design?
I would like to add a 2 inch standpipe for our washing machine right next to the laundry sink, and noticed this picture in a book on plumbing codes as an example of one way to handle this kind of situation. In my case, actually, the standpipe would be just after the sink attachment (rather than before, as in this photo), and I would replace the present 1 1/2 inch piping and fittings back to the 2 inch PVC vent and drain pipe with 2 inch PVC. Does this in fact show a code-compliant design?