Water Supply Riser Sizing

Size vertical water supply risers in multi-story buildings using fixture unit method.

Number of floors served by riser.
WSFU on each typical floor.
WSFU
1=residential, 2=hotel, 3=office.

Results

Total Fixture Units-WSFU
Demand Flow-GPM
Riser Size-inches
References: Based on UPC Table 610.3 and diversity factors for multi-story buildings