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

According to the Illinois Plumbing Code, vents must terminate independently above the roof at a height of at least 6 inches above the flood level rim of the highest fixture being served. This requirement helps to ensure proper venting and prevents potential blockages or issues that could arise from environmental factors, such as snow or debris accumulation, which could affect the system's performance.

While other inch measurements may seem feasible, they do not align with the established guidelines that prioritize effective drainage and ventilation in plumbing systems. Therefore, the specification of 6 inches is critical for maintaining proper air pressure within the plumbing system and ensuring efficient operation.