Drainage, Waste & VentQuestion 107 of 360
A 6 inch building drain sloped at 1/8 inch per foot is permitted a maximum load of how many DFU?
a.840 DFU
b.1000 DFU
c.700 DFU
d.620 DFU
Explanation
Table 703.2 permits a 6 inch building drain at 1/8 inch per foot to carry 700 DFU. At 1/4 inch per foot it rises to 840 DFU, and at 1/2 inch per foot to 1000 DFU. The 620 value is a 6 inch horizontal fixture branch capacity, not a building drain load.
Law Reference: 2022 California Plumbing Code (CPC) §703.0 (Table 703.2)Practice all 360 questions free — no signup required.
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