I am installing a new washer box. (see picture for reference) My plan was to switch out the Wye from the sink so the top was 2" and put the p-trap and Wye from the washer just above that in the stack. Then reattach the vent to that. My buddy was making a comment that a washer Wye has to go below the sink Wye in the stack.
As you can tell doing so would be a bit of a pain given the position of both appliances. I will say I'm not up to par on the plumbing codes (pretty sure he isn't either).
Is there any reason that I cant just fit in the washer above the sink Wye?
Location is Virginia.