Replacement diaphragm pump head for Everflo EF2200 & EF2200-QA Includes a honeywell Micro switch, corrosion resistant Viton valves & santoprene diaphragm Faster primes & a unique pressure switch that slowly cycles The pump to reduce wear on the motor & switch Automatically turns off when no flow is required to conserve battery life Perfect for spot spraying, broadcast spraying and other transfer fluid applications Power source type: Battery Powered