HI! A plumber at home Depot mentioned something about the standpipe being recently update in the plumbing code, is this correct?
I am renovating a laundry in a building which is going to be fitted with two commercial washing machines and I need to know what height range the standpipe should be from the trap ( Min and Max from trap). and also need to know the distance ( Min and Max ) the trap should be from the floor.
I need the Canadian OR Quebec, Canada code if possible.
I am using a 2 1/2 standpipe going into a 2" cast-iron stack. Pic included.