I am looking for information on how i would go about hooking up the drain for a new utility sink in my garage. It will be going next to my washer & dryer so i am trying to figure out how to use that same drain. Ive searched and searched on here and found a lot of posts but i am very confused on the venting and draining and p-trap configurations. I have attached a sketch of what i currently have and what i was planning on doing. Was gonna add the sink with a p trap drain and run a pipe from there on a slope and tie it into the washer drain down low. Can anyone advise me weither this is right or wrong or how i go about doing this. My house was built in the 60s. The drain pipe for the washer is a single 1-1/2" pvc pipe coming straight up out of the slab about 36" everywhere ive read says it has to be 2". Its been working fine so i think ill live with what i got but do want to get a sink added. i have a septic system i dont know if this makes a difference. thanks
Current Setup:
What I Was thinking about doing:
Current Setup:
What I Was thinking about doing: