high pressure pump 1. the pump head is diaphragm pump 2. can supply high pumping 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 by surge tanks and pressure switch, gardening, and increasing of water pressure. Its pump is advantage diaphragm pump, electricity running, omitted the original ...