Illinois Plumbing Code Practice

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Prepare for the Illinois Plumbing Code Exam with our comprehensive quiz that includes flashcards and multiple-choice questions to bolster your understanding of plumbing standards and regulations. Gear up for your test!

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!

Practice this question and more.

At what intervals should all horizontal plastic pipe be supported, and how close should trap arms in excess of 3 ft be supported to the Trap?

2 ft, close as possible
3 ft, close as possible
4 ft, within 1 ft
5 ft, within 2 ft

The correct answer is: 5 ft, within 2 ft

In plumbing installations concerning horizontal plastic pipes, it is essential to maintain proper support at regular intervals to prevent sagging and ensure the integrity of the system. The correct intervals for supporting horizontal plastic pipe as per the Illinois Plumbing Code is every 5 feet. This allows for optimal stability while accommodating any thermal expansion that may occur due to temperature changes. Furthermore, for trap arms that exceed a length of 3 feet, they should be supported within 2 feet of the trap. This proximity ensures that the trap remains effectively leveled to retain water and function properly, preventing issues such as siphoning and odors from leaking back into the living space. Maintaining these standards is critical for the overall function and reliability of plumbing systems. Each component plays a vital role in preventing problems that could arise from inadequate support, such as pipe collapse or failure over time.