According to NFPA 20, screens on the suction intakes of a water supply from an open source must be inspected how often for accumulated debris?

According to NFPA 20, screens on the suction intakes of a water supply from an open source must be inspected how often for accumulated debris?

• A. Periodically
• B. Daily
• C. Weekly
• D. Monthly

Answer: (A)

The main idea is to keep suction intake screens on open-source water supplies clear of debris through regular maintenance. NFPA 20 requires these screens to be inspected for accumulated debris on a periodic basis, meaning at regular maintenance intervals established for the system, rather than tying the requirement to a fixed daily, weekly, or monthly timetable. This periodic inspection matters because debris at the suction screen can restrict flow into the pump, lead to reduced suction, cavitation, or pump damage, and ultimately jeopardize water delivery during an incident. By inspecting periodically, you catch buildup early, clean the screen, and maintain reliable performance. In practice, the exact interval should be set by the maintenance program or the authority having jurisdiction, based on the environment and debris load.

The main idea is to keep suction intake screens on open-source water supplies clear of debris through regular maintenance. NFPA 20 requires these screens to be inspected for accumulated debris on a periodic basis, meaning at regular maintenance intervals established for the system, rather than tying the requirement to a fixed daily, weekly, or monthly timetable.

This periodic inspection matters because debris at the suction screen can restrict flow into the pump, lead to reduced suction, cavitation, or pump damage, and ultimately jeopardize water delivery during an incident. By inspecting periodically, you catch buildup early, clean the screen, and maintain reliable performance.

In practice, the exact interval should be set by the maintenance program or the authority having jurisdiction, based on the environment and debris load.