Illinois Plumbing Code Practice Exam 2026 – All-in-One Guide for Exam Success!

In accordance with the Illinois Plumbing Code, the distance between a trap and the fixture it serves should not exceed five feet. This regulation is in place to ensure that the trap effectively prevents sewer gases from escaping and that wastewater flows smoothly from the fixture to the sewer system. If the distance were to be greater than five feet, there could be issues with maintaining a proper water seal within the trap, which can lead to undesirable odors and potential health hazards.

The five-foot maximum distance sets a standard that balances the practical layout of plumbing systems with the necessary functional requirements for trapping and venting wastewater. Adhering to this distance helps ensure that the plumbing system operates as intended, maintaining sanitary conditions in both residential and commercial settings.