“Building Code Of The Day” 10/17/2017

B) Up to 7.5 gpm

C) Between 5 to 8 gpm

D) Between 5 to 10 gpm
E)Between 8 to 15 gpm

Answer: B) Up to 7.5 gpm

UPC Table 702.1 dictates how many drainage fixture units (DFU) per plumbing appliance, appurtenances or fixture and minimum trap size. E.G. for residential, a Bathtub/Shower is 2 DFU’s, a Water Closet(toilet) is 3 or 4 DFU’s(based on gallons per flush) and a Lavatory (sink) as 1 DFU’s.


Table 702.2(b) dictates discharge gallons per minute based on Fixture Units