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!

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How many inches should the air gap at the water supply inlet to potable water supply tanks be?

The correct answer is: 6 4

The requirement for the air gap at the water supply inlet to potable water supply tanks is specifically set to ensure that there is a safe distance preventing any potential contamination of the potable water supply. In this context, having an air gap of 6 inches is vital because it effectively creates a break in the water supply system that protects against backflow or siphoning, which can lead to contamination. The standard of a 6-inch air gap is widely accepted and is in compliance with plumbing codes, including those outlined in the Illinois Plumbing Code. This requirement serves to maintain the quality and safety of drinking water, as it minimizes the risk of pollutants entering the potable water supply. Other options that indicate either a lesser or greater measurement do not meet the established guidelines necessary for safeguarding drinking water systems.