This Advanced Elements?« two-way hand pump pushes 44 gallons of air at 60 strokes per minute, so you can rapidly fill most inflatables. High-capacity double-action pump fits many valve types, including Boston valves, and comes with 4 locking valve adapters. High pressure output, rated to nominal 14.7 PSI or 1 atmosphere, provides continuous airflow through the large, flexible hose, which has locking ends. Features both inflation and deflation capabilities for greater versatility; large handles and foot plate increase comfort during use. Made from noncorrosive, lightweight plastic; disassembles to allow inspection and maintenance. For extreme emergencies, pump can serve as a bilge pump to expel water from boat.