DE3C Hydrostatic Test Pump 6 GPM up to 450 PSI – DISCONTINUED DISCONTINUED PRODUCT! FOR CURRENT UPGRADED MODEL, PLEASE SEE DEH-10/450. The DE3C, a hydrostatic test pump, designed for testing water, sprinkler, landscaping and irrigation lines. Offering 6 GPM up to 450 PSI, enclosed in a heavy duty steel frame and base. The positive displacement twin piston pump has cast iron housing and head, and utilizes stainless steel valves. Available with Honda or Briggs engine options.