This clever bilge pump design allows great versatility during installation, so you can orient the pump to best suit your boating needs. Whale's high-performance pump design can be mounted on deck, thru the deck, or on your bulkhead. Features:• High Performance - flow rate (66 liters/17.5 US gals per min.)• Reliability - non-choke valves and fully enclosed protected diaphragm• Easy maintenance with inspection hatch (no tools required)• Suitable for pumping bilge water, saltwater. or diesel Non-choke valves and enclosed diaphragm Easy maintenance with inspection hatch | MK 5 Universal Manual Bilge Pump