Water Supply & DistributionQuestion 52 of 360
PEX tubing is being routed through a framing environment where it could be exposed to sunlight through a skylight for extended periods. What limitation applies?
a.PEX has no exposure limits
b.PEX may be left in direct sun indefinitely
c.PEX must be painted black
d.PEX has a limited UV exposure rating and must be protected from prolonged sunlight per the manufacturer listing
Explanation
PEX has a limited ultraviolet (UV) exposure rating and must be protected from prolonged sunlight in accordance with its listing, or it can degrade. Claiming no limits, indefinite sun exposure, or that painting it black solves the issue all conflict with the UV limitation.
Law Reference: 2022 California Plumbing Code (CPC) §604.1Practice all 360 questions free — no signup required.
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