What is the purpose of a pump intake screen (strainer) when drafting?

• A. To measure intake velocity
• B. To keep debris out of the pump and prevent clogs and damage.
• C. To reduce noise
• D. To increase nozzle pressure

Answer: (B)

When drafting, the pump encounters air and whatever is in the water source. The intake screen serves as a barrier that blocks debris such as leaves, sticks, and sediment from entering the pump while still allowing water to flow in. This protection helps prevent clogs, wear, and potential damage to the pump’s impeller and internal components, and it reduces the chance of problems like loss of prime. The screen must be kept clean and properly sized so it doesn’t overly restrict flow, which could hurt performance. It isn’t meant to measure velocity, reduce noise, or increase nozzle pressure.