Drainage, Waste & VentQuestion 106 of 360
A 5 inch building sewer sloped at 1/4 inch per foot is permitted a maximum load of how many DFU?
a.390 DFU
b.480 DFU
c.575 DFU
d.840 DFU
Explanation
Table 703.2 permits a 5 inch building sewer at 1/4 inch per foot to carry 480 DFU. At 1/8 inch per foot it is limited to 390 DFU, and at 1/2 inch per foot to 575 DFU. The 840 value belongs to a 6 inch line at 1/4 inch per foot.
Law Reference: 2022 California Plumbing Code (CPC) §703.0 (Table 703.2)Practice all 360 questions free — no signup required.
Related questions on this topic
- The required size of a vent pipe:
- In areas subject to frost closure, a vent extension through the roof must be increased to a minimum of 3 inches, and the change in size must be made at least:
- The horizontal drainage pipe between a fixture trap and its vent is called the:
- A 6 inch building drain sloped at 1/8 inch per foot is permitted a maximum load of how many DFU?
- A 2 inch building drain sloped at 1/4 inch per foot is permitted a maximum load of how many DFU?
- Loss of a trap seal from siphonage or back pressure is primarily prevented by:
Last reviewed: · editorial process
PrepPass Editorial Team · Verified against California CSLB C-36 Plumbing Trade Examination · How we review