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

In determining the number of roof drains required for a roof area exceeding 10,000 square feet, it’s essential to reference relevant plumbing codes and standards. For larger roofs, proper drainage is crucial to prevent water accumulation, which can lead to significant structural issues and damage.

According to typical plumbing codes, for roofs larger than a certain threshold—commonly 10,000 square feet—additional drains are mandated to ensure effective water removal. The standard requirement is that one drain is necessary for each increment of roof area, often specified in square footage. The guidelines generally recommend one drain per 2,500 square feet of area.

Thus, when you calculate the necessary number of drains for a roof that exceeds 10,000 square feet, you would arrive at needing at least four drains to provide adequate drainage. This ensures that even during heavy rainfall, the roof can manage water flow effectively and prevent ponding or leaks.

This understanding aligns with typical plumbing practices, emphasizing that proper installation and adherence to local codes are essential for maintaining the integrity and safety of the structure over time.