Water Supply & DistributionQuestion 2 of 360
You measure a static street pressure of 95 psi at a new residence. According to the code, what is required on the water supply?
a.Nothing; pressure below 100 psi is always acceptable
b.An approved pressure-reducing (regulating) valve to limit pressure to 80 psi or less
c.A larger water meter to absorb the pressure
d.A check valve at every fixture
Explanation
When static water pressure exceeds 80 psi, the code requires an approved pressure regulator to reduce downstream pressure to 80 psi or less. Doing nothing is wrong because 95 psi exceeds the 80 psi limit; a larger meter does not reduce pressure, and per-fixture check valves are not the code remedy for excessive pressure.
Law Reference: 2022 California Plumbing Code (CPC) §608.2Practice all 360 questions free — no signup required.
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