Raritan Diaphragm Intake Pump - 12VDC. The NIB (Nothing But Water) Diaphragm Intake Pumps rely on ambient air pressure to keep the lungs healthy. They're generally used in intake hoses for cooling engines at the beginning and end of the cooling cycle. The heart of this Raritan engineered product is the highly efficient (low power draw) diaphragm pump and motor assembly. There's a clutch in the pump allowing the engine to run without the engine running. The diaphragms are very sensitive to air movement so they must be kept clean. So if the air in your boat is dirty or if you're going to be splashing through the engine a lot then the Raritan Diaphragm Pump and Motor Assembly is for you. Features of Raritan Diaphragm Intake Pump Volts: 12 Volts Amps - Draw: 10 Amps Package Contents: Raritan Diaphragm Intake Pump Raritan 166000: Diaphragm Intake Pump - 12VDC