Progressive Pumps Corp. distributes metering pumps manufactured by Liquid Metronics, Pulsafeeder, Liquiflo, Tuthill, Sherwood, Durco-Durameter, Neptune, Alldos, Chemtech, LMI, Stenner, Gorman Rupp Industries, Iwaki, Linc, and Arrow. Metering pump types include piston pumps, peristaltic pumps, bellows pumps, diaphragm pumps, solenoid diaphragm pumps, gear pumps, and hydraulic-backed diaphragm pumps.