Features May 2011 Issue

Bench Test Simulates Onboard Plumbing Setup

Our testing apparatus included a pressure gauge and shut-off valve rigged on an upright board that provided about a 6-foot lift—about the max for boats 40 feet or shorter. The rig has a 3/4-inch outlet with 3/4-inch hose leading down to a calibrated container; this permitted precisely timed runs to determine the actual gallons-per-minute flow. Pumps that offered multiple hose-diameter options were tested using the largest option.

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