Core TradesQuestion 188 of 700
When the static water pressure supplied to a building exceeds what value, a pressure-reducing valve is generally required?
a.40 psi
b.60 psi
c.80 psi
d.120 psi
Explanation
When static supply pressure exceeds 80 psi, a pressure-reducing valve must be installed to protect fixtures, appliances, and piping. 40 and 60 psi are within the normal usable range, and waiting until 120 psi would leave the system exposed to damaging high pressure.
Law Reference: 2025 CA Plumbing Code, Chapter 6 (Water Supply)Practice all 700 questions free — no signup required.
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