What is the function of a suction strainer on the pump intake?

• A. To regulate pump speed.
• B. To cool the water before it enters the pump.
• C. To prevent debris from entering the pump and causing damage or clogs.
• D. To measure ambient air flow.

Answer: (C)

A suction strainer protects the pump by keeping debris out of the suction line. It’s a screen at the pump inlet that catches leaves, dirt, sand, and other solids before they reach the impeller. By blocking these objects, it prevents damage to internal pump parts, reduces the chance of clogs, and helps maintain a steady prime and flow. Keep in mind, though, that the strainer adds some resistance to flow and must be cleaned regularly; a dirty screen can starve the pump and negate its protective purpose. It doesn’t regulate pump speed, cool the water, or measure ambient air flow.