What is the purpose of a roof drain?

• A. To vent vapors from the tank
• B. To drain rainwater through a hose or articulated pipe
• C. To drain product from the roof
• D. To connect to the fire suppression system

Answer: (B)

Removing rainwater from the roof is the main purpose. A roof drain provides a path for water that collects on the roof to be discharged, typically through a hose or articulated pipe, to a safe drainage area. This prevents standing water, reduces the extra weight on the roof, and minimizes risks such as ice formation or corrosion that can affect structure and operations. It’s not used to vent vapors, drain process product from the roof, or connect to a fire suppression system.