... operating efficiency 2.Higher operating pressure and/or lower amperage than competitive pumps Long life Features:1, High quality 12 and 24 Volt ... Certificate: Rohs/CE/ISO9001:20007, Stainless steel bolts, water resistant pressure swith, snap-in connection, special valve and diagphragm for easy ... , self priming, automatic switch, low noise, corrosion resistant electric high pressure water pump