Illinois Plumbing Code Practice

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How many inches above the flood level rim of the highest fixture must vents terminate independently above the roof according to the Illinois Plumbing Code?

4 inches

6 inches

Vents must terminate independently above the roof at a height of at least 6 inches above the flood level rim of the highest fixture. This requirement is designed to ensure that any potential wastewater or condensation does not interfere with the venting system, thereby maintaining proper airflow and preventing backpressure in the plumbing system.

By having vents terminate at this specified height, the system helps reduce the risk of odors escaping into occupied spaces and allows for effective drainage without creating negative pressure. Proper venting is crucial for maintaining overall plumbing system performance, and the Illinois Plumbing Code establishes these standards to promote safe and effective plumbing practices.

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8 inches

10 inches

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