... head, high suction 3. maintaincefree High pressure self priming pump(HB pump) HB series high pressure self-priming pump are suitable for pumping clean water ... /2inch, 3/4inch, 1inchVoltage/Frequency: 220V, 110/220V, 50HZ, 60HZ Motor:Single phase/Three phaseClass of insulation: B/FProtection Level: IP44 ...