Crack the Illinois Plumbing Code Exam 2026 – Dive into Your Future with Confidence!

Question: 1 / 400

The developed length from the fixture outlet to the trap weir shall not exceed how many inches?

18

20

22

24

The developed length from the fixture outlet to the trap weir is governed by the Illinois Plumbing Code, which aims to ensure proper drainage and prevent issues such as siphoning or improper venting. The set maximum length for this distance is 24 inches. This limit is established to ensure that waste can flow freely to the trap and that venting is adequate, maintaining the proper functioning of the drainage system.

Longer distances can create drainage issues, so this specific measurement is in place to maintain a balance between fixture performance and the overall efficiency of plumbing systems. It's important to adhere to these requirements in plumbing design to ensure reliable and effective drainage in any installation.

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