5K Series – Self Priming Centrifugal Pumps Home > Brands > CAT Pumps > Centrifugal Pumps > 5K Series – Self Priming Centrifugal Pumps Posted on September 8, 2016February 1, 2017 by tugz Sold as Pump Kit or Motorized Unit. Flow Range: Up to 18.5 GPM Pressure Range (up to 82 PSI): 190 ft. Head RPM: 3450 RPM Inlet Fitting: 1-1/4″ NPT Discharge Fitting: 1″ NPT Shaft Seal: Mech Type 21 Horsepower: 1, 2 HP Maximum Temperature: 113°F