In reply to message posted by unity:
Its to bad plumbers do not have a code book thats close to the same in this country. Respect comes from organisation. In CT you can vent 102 DFU (16 bathrooms) on one 1 1/2 vent pipe 30 ft.
Is this a local code like Danbury or a state code?
102 FU’s seems like a lot on a 11/2 pipe ESPECIALLY in a movie theater where it would be quite possible all fixtures being used at once during an intermission.
The over loading of the vent would be unbelievable with back pressures.