Johnson Flexible Impeller Pump 12v DC Connection 1/2" BSP Female Max Flow rate : 48 LPM Max Head : 6 METRES Heavy duty impeller pump for bilge pumping, deckwash, water circulation, Also oil and diesel refuelling at dockside service, etc. The motor is 12V DC, ball bearing mounted, ignition protected and has a thermal protection to prevent it from over-heating.