Does this plumbing code differentiate between the different types and sizes of washers? I am asking, because I am trying to get a plumber install a compact, 2.2 cu ft., 24'' wide, front load washer in the place of my dishwasher in my kitchen. And despite the fact that the washer's manual asks for a minimum of 1 1/4 '' drain pipe, all I get by the plumbers is that can not do the job because my drain pipes are 1 3/4'' whereas their codes requires dain pipes for washers to be 2''.
I am not a professional plumber, but I think there is quite a difference between a 6 cu. ft . washer and a 2.2 cu. ft. washer. So do these plumber codes make a difference based on the size of the washers and the amounts of water they use in setting the drain pipe requirements?