Planning & EstimatingQuestion 300 of 360
When sizing a building sewer during layout, the required size is based primarily on what?
a.The total drainage fixture units carried and the slope, per the code's sizing table
b.The color of the fixtures
c.The number of electrical outlets
d.The height of the roof
Explanation
CPC 718.0 and its referenced tables size the building sewer from the total drainage fixture unit (DFU) load it carries at a given slope. More fixture units or a flatter slope require a larger pipe. Sizing from DFUs on the plan ensures the sewer can carry peak flow without surcharging.
Law Reference: CPC 718.0Practice all 360 questions free — no signup required.
Related questions on this topic
- When planning a trench for a building sewer, what does the CPC require regarding the bottom of the trench?
- A plan note reads "See detail 3/P-4." What does this callout tell the installer?
- Before excavating a trench for underground plumbing on a commercial site, which coordination step is most important for safety and to avoid utility strikes?
- What is the main reason to prepare a written material takeoff before ordering pipe and fittings for a job?
- When laying out vent piping, the CPC requires vents to be graded and connected so they do what?
- You take off 220 linear feet of pipe from the plans and add a 10% waste allowance. Pipe is stocked in 20-foot lengths. How many 20-foot lengths should you order?
Last reviewed: · editorial process
PrepPass Editorial Team · Verified against California CSLB C-36 Plumbing Trade Examination · How we review