ZanneJ
Bronze Member
I'm asking here because on another forum, a person in Airzona had a plumber install the plumbing for her sink and he had a 90 elbow and a horizontal run below the flood level of the sink. We told her about the rule requiring a vertical run for at least 6" above the flood level of the highest fixture. When she asked her plumber about it, he claimed that the Arizona Plumbing Code had an exception to that rule and that it was not required if it was just a single sink tied in to the vent.
Is that true or is the plumber BSing her?
Is that true or is the plumber BSing her?