Core TradesQuestion 30 of 700
When sizing fuel-gas piping to appliances, the two governing factors are the total gas demand (Btu/hr) and:
a.The color of the pipe coating
b.The ambient room temperature
c.The developed (longest) length of the piping run
d.The number of shutoff valves installed
Explanation
Gas pipe is sized from a table using the total connected demand and the developed length to the farthest appliance, which together set the required diameter. Coating color, room temperature, and valve count do not govern the pipe size.
Law Reference: 2025 CA Plumbing Code (CPC) Chapter 12 (Fuel Gas)Practice all 700 questions free — no signup required.
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