Which statement best describes roof drain handling?

• A. They are left car sealed open
• B. They are left open and unsealed
• C. They are fitted with caps
• D. They are flushed every shift

Answer: (A)

Roof drains are part of the drainage safety system, and handling them correctly is about keeping the path clear while protecting the interior from contamination. The idea is to leave the drain in a state that prevents debris, pests, and odors from entering the drainage lines, but still allows water to flow away when rain comes. By leaving the drain sealed, you create a barrier that reduces blockages and contamination, yet the outlet remains usable for drainage. This balance helps minimize maintenance and exposure to any gases or liquids that could back up from the system. Leaving drains completely open and unsealed increases the chance of debris, pests, or weather entering the line and causing problems. Using caps or closures appropriately without maintaining a proper seal would not provide the same level of protection, and flushing the system every shift isn’t a routine safety practice for roof drains.