Why is it important to inspect suction strainers?

• A. Debris can block suction and cause cavitation or loss of prime.
• B. Suction strainers influence only color of water
• C. Suction strainers have no effect on priming
• D. Strainers prevent cavitation

Answer: (D)

Inspecting suction strainers matters because they keep debris out of the pump suction. If debris blocks the strainer, suction can be restricted, which can lead to loss of prime and reduced flow. A loss of prime means the pump can’t stay fully filled with water, causing startup or running issues. The restricted flow and pressure drop can also create conditions that promote cavitation, which damages the pump. So the main reason to inspect is to remove debris, keep the suction path clear, and preserve prime to prevent flow problems that could lead to cavitation. Strainers don’t inherently prevent cavitation by themselves—cavitation depends on pressure, vapor pressure, and overall system hydraulics—so saying they prevent cavitation outright isn’t accurate.