I'm adding a laundry/utility tub to my garage and have exposed the existing plumbing behind the wall (see picture). I understand I need to have both the sink and washing machine drains vented, but I don't have a ton of space to work with. I can't really go beyond the studs on either side of the picture.
The plan is to have a stacked washer/dryer to the right, with the laundry sink on the left. I'd like to keep as much in the wall as possible, ideally with a laundry outlet box somewhere.
Is there a configuration (meeting CA code) that might work for this? A sketch would be helpful.
Best Answer
After learning way too much about drains and venting, here’s how I solved adding a properly vented sink drain, plus a washer outlet. A professional plumber who was snaking the drain inspected it and gave it a thumbs up. Hope this is useful to anyone looking for ideas.