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

In the Illinois Plumbing Code, the requirement for cleanouts in horizontal drainage lines that are 4 inches to 10 inches in size is aimed at ensuring proper access for maintenance and cleaning of the drainage systems. The established maximum distance between cleanouts, which in this case is 100 feet, is a standard that helps prevent blockages and allows for effective inspection of the plumbing system.

Having cleanouts spaced no more than 100 feet apart allows for easier access to the drainage lines. This is crucial as it ensures that plumbers can quickly address any potential clogs or issues that may occur over a long stretch of ductwork. The distance also considers the developed length of the cleanout pipe, making it essential for efficient functioning.

This regulation is based on best practices designated by plumbing codes to facilitate not just regular maintenance but also emergencies where quick access is necessary to prevent overflow or damage to the property. In contrast, shorter distances would lead to more frequent cleanouts, potentially complicating access unnecessarily. Thus, the specification of 100 feet maximizes efficiency while maintaining the effectiveness of the plumbing system.