Water Supply & DistributionQuestion 44 of 360
Two identical branches serve the same fixture group, but branch A is 20 feet long and branch B is 80 feet long, same diameter and flow. Which statement about friction loss is correct?
a.Both have equal friction loss
b.Branch B has less loss
c.Friction loss is independent of length
d.Branch B has roughly four times the friction loss of branch A
Explanation
For the same diameter and flow, friction loss is proportional to length, so an 80-foot run has about four times the friction loss of a 20-foot run. Equal loss, less loss for the longer run, and independence from length all contradict the basic friction relationship.
Law Reference: 2022 California Plumbing Code (CPC) §610.0Practice all 360 questions free — no signup required.
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