What is the minimum required trap size for a bathtub? How many DFUs does a kitchen sink have? Which fixture type in Table 709.1 does note "a" apply to? How many DFU's are assigned to a fixture drain or trap size of 4 inches? Why does having a showerhead over a bathtub not increase the drainage fixture units? How many water closets must be provided in an office building that has a total occupancy of 400 persons? The calculations for a shopping center indicate that 11.5 male and 11.5 female toilets are needed. How many should be provided? When is potty parity required? Provide one example of when separate facilities are not required. Provide one example of when a public toilet facility is not required