Crack the Illinois Plumbing Code Exam 2025 – Dive into Your Future with Confidence!

Question: 1 / 400

Unions on drainage systems may be used in the trap seal and on the inlet and outlet side of the trap. Unions shall have metal to metal seats except that plastic unions may have plastic to plastic seats. True or False?

True

In the context of the Illinois Plumbing Code, the statement is true as it accurately reflects the regulations concerning the use of unions in drainage systems. Unions are critical components that allow for easy disconnecting and connecting of pipes without the need for cutting them, which is particularly useful for maintenance and repairs.

The specification that unions shall have metal to metal seats emphasizes the importance of durability and a secure connection, which helps prevent leaks under pressure. However, allowing plastic unions to have plastic to plastic seats serves to accommodate the various materials used in plumbing systems, as plastic fittings are often lighter and may be preferred in certain applications due to their resistance to corrosion.

Overall, this provision ensures compliance with safety standards while also providing flexibility in the types of materials that can be used in plumbing systems.

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False

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