Illinois Plumbing Code Practice

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Prepare for the Illinois Plumbing Code Test! Enhance your skills with diverse multiple-choice questions and detailed explanations. Ace your plumbing exam with ease!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

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At what intervals should horizontal threaded pipe 1 1/2" in and larger be supported?

10 ft intervals
12 ft intervals
15 ft intervals
20 ft intervals

The correct answer is: 12 ft intervals

The correct answer is based on the guidelines set forth in the Illinois Plumbing Code. For horizontal threaded pipe that is 1 1/2 inches in diameter and larger, the code mandates that such pipes should be supported at intervals of 12 feet. This requirement is in place to ensure the structural integrity of the piping system, preventing sagging or undue stress on fittings and joints, which can lead to leaks or damage over time. The choice of 12 feet is specifically tailored to accommodate the weight and flexibility of the larger diameter pipes while also allowing for proper alignment and support in various installation scenarios. The use of correct support intervals is vital for maintaining a safe and efficient plumbing system, as well as complying with local regulations.