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New York City Gas Code Practice Test

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The untreated portion of gas piping outlets must extend through finished ceilings and walls by at least how many inches?
Correct Answer:
1 Inch
Explanation:
When gas piping outlets pass through finished ceilings and walls, enough of the pipe must extend beyond the finished surface so the end remains accessible for capping, testing, and any future connections without being obstructed by drywall or plaster. The minimum length that accomplishes this is one inch. Extending only a shorter amount could leave the end behind finished material, making it hard to cap or test properly, while extending far beyond one inch is usually unnecessary and could interfere with finishes or fixtures.

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