With its simple and classic design, this surface-mounted pump can be placed inside or outside a locker. Save power and water with Whale Pumps Gusher MKIII Foot Pump which discharges on each stroke and self-primes up to 7'. With its smooth double action, these foot pumps can be used for freshwater or saltwater. Operates dry without damage and the easy to use foot operation means your hands are free to multi-task. Finally, with three mounting options and multi-directional inlet and outlet hoses, installation is a breeze. Key Features Pump fresh or salt water at 15 liters or 4 US gallons a minute Smooth double action Self-priming up to 7' Runs dry without damage Hands-free operation for ease of use Multi-directional inlet and outlet hose connections for easy installation Three mounting options including through the bulkhead Port sizes are 1/2"