I purchased a two family home, and each unit has its own washer/dryer
In the basement, I can see that one washer/dryer drain pipe is 2" while
the other is 1.5".
Generally speaking, is either size "to code"?
I also noticed that both drain pipes are NOT sloped properly. In fact
the 2" pipe slopes down 2", then back up 2" over a 20 foot run, and it
will not be easy to fix (other utilities are in the way), but the drain
seems to work fine and does not leak.
How critial is it that I have this sloping problem fixed?