Drainage, Waste & VentQuestion 113 of 360
A common vent may serve how many fixtures connected at the same level?
a.2
b.3
c.4
d.8
Explanation
A common vent serves two fixtures that connect to the drainage system at the same level through a single vent. Three or four fixtures exceed the common-vent limit and need another venting method, and eight is the maximum for a circuit vent, not a common vent.
Law Reference: 2022 California Plumbing Code (CPC) §905.6Practice all 360 questions free — no signup required.
Related questions on this topic
- Developed length of a pipe run is measured as:
- In a wet-vented bathroom group, a wet-vent section carrying 4 DFU must be at least what size?
- An island sink, with no wall to run a vent up, is commonly vented using a:
- A fixture is 5 feet from its vent, but the trap arm is 1-1/2 inch, which allows only 3 feet 6 inches. The correct fix is to:
- The minimum slope for a 2-1/2 inch horizontal drainage pipe is:
- The size of a building drain or sewer:
Last reviewed: · editorial process
PrepPass Editorial Team · Verified against California CSLB C-36 Plumbing Trade Examination · How we review