Self-priming diaphragm pump with 12v or 24v DC electric motor. Flow rates from 4-8 litres/min (1-2.1 US gallons/min), pressure switch control or with a bypass, or both, capable of pressures up to 6.5bar (95psi) Features:: • Handles Water-like and Viscous Liquids Up to 250 cP • Chemical-resistant polypropylene pump head for long life • Latest techhnology internal check-valves for reliable self-priming • Choice of elastomers for maximum chemical compatibility • Internal bypass for excellent performance range • Optional pressure-switch control to run the pump only as needed • Available with long running heavy duty motor with built-in thermal overload • Available with commercial-duty DC monitor for continuous operation