Core TradesQuestion 34 of 700

Shower and tub-shower control valves must be pressure-balancing or thermostatic types and are required to limit the water temperature to a MAXIMUM of:

a.120 degrees F
b.130 degrees F
c.140 degrees F
d.150 degrees F

Explanation

These anti-scald valves must cap outlet temperature at 120 degrees F to protect bathers from burns. The higher values would exceed the safe limit and defeat the purpose of the valve.

Law Reference: 2025 CA Plumbing Code (CPC) §408 (Showers)

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