Drainage, Waste & VentQuestion 108 of 360
A 2 inch building drain sloped at 1/4 inch per foot is permitted a maximum load of how many DFU?
a.26 DFU
b.24 DFU
c.6 DFU
d.21 DFU
Explanation
Table 703.2 permits a 2 inch building drain at 1/4 inch per foot to carry 21 DFU. At 1/2 inch per foot the same pipe carries 26 DFU. The 24 value corresponds to a 2-1/2 inch drain, and 6 DFU is the branch capacity of a 2 inch fixture branch, not the 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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