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

Vertical lead pipe should be supported at intervals of 4 feet. This specification ensures that the pipe maintains structural integrity and does not sag or bend under its own weight or any external forces. Supporting the pipe at this interval helps prevent potential leaks, breaks, or safety hazards that may arise from inadequate support.

While other intervals could theoretically be considered, they do not comply with the standard practices outlined in the Illinois Plumbing Code. Supporting lead pipe at intervals shorter than 4 feet may increase the frequency of support points unnecessarily, while intervals longer than 4 feet may compromise the pipe's stability.