Rhode Island Journeyman Plumber Practice Exam 2025 - Free Journeyman Plumber Practice Questions and Study Guide

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What is the minimum required height for roof drain strainers above the roof?

1/4"

The minimum required height for roof drain strainers above the roof is typically set at a quarter of an inch. This measurement is crucial as it ensures that the strainer can effectively cover the opening of the roof drain while allowing water to flow freely into the drainage system. This height is sufficient to prevent debris accumulation on the strainer while avoiding any risk of water pooling on the roof itself.

A greater height might impede the flow of water and create potential issues during heavy rainfall by hindering drainage effectiveness. Additionally, various building codes and regulations dictate these specifications to promote proper water management and prevent damage to the roof structure. Following these guidelines is essential for maintaining the integrity of the roofing system and ensuring that drainage systems function optimally.

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1 1/2"

18"

42"

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