Triplex Hi-Flow Electric Diaphragm Pump Flow rates from 7.6 litres/min (2 US gallons/min) Pressure switch control capable of pressures up to 4.1bar (60psi) Model No.: 03521 & R3521 Series Constructed from a selection of materials suitable for handling a broad range of applications Self-priming up to 8 feet (2.3 m) Can be located above supply tank Can run dry for extended periods without damage Applications: Designed for a wide range of applications and constructed from a selection of materials suitable for handling a broad range of chemicals. The Triplex Hi-Flow pumps are self-priming and can run dry without harm