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dwv size upc

  1. Maximum Unit Loading of Drainage Piping

    I have a UPC question regarding DWV pipe size. It is unclear the exception to Table 7-5 Maximum Unit Loading and Maximum Length of Drainage and Vent Piping for 3" pipe has a vertical FU of 48 with a foot note. 4 Only four (4) water closets or six-unit traps allowed on any vertical pipe or...