Flex-Pro® A2 Peristaltic Pumps provide smooth, quiet pumping action that delivers precise amounts of chemical to your system. Minimum feed: 0.02 gallons per hour (0.07 LPH); maximum 14.9 gallons per hour (56.2 LPH); pressures to 125 PSI. The A2’s frame is ruggedly built and includes easily accessible advanced electronics, variable speed DC motor, and operator friendly touchpad. All Flex-Pro® pumps include the exclusive patented built-in Tube Failure Detection (TFD) System. It detects a wide range of conductive chemicals with no false triggering. If the TFD senses tube failure, the pump automatically shuts off.