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Pressure-Pro Cat Pumps 4000 PSI 4 GPM Gas Flange Hollow Shaft

The Cat Pump 66DX40GG1 is a 4 GPM, 4000 PSI, gas flange, hollow shaft reciprocating pump. Triplex design provides smoother liquid flow and regulating Unloader is standard on each pump for system pressure control and pump protection.
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This is a direct-drive triplex [three plunger rods] plunger pump, constructed of a brass manifold, 304SS valve assemblies, solid ceramic plungers and standard NBR [Buna-N] seals and o-rings. This high performance, economy pump is a flange-mount, hollow-shafted pump designed to bolt directly to a gas engine drive, providing an easy, compact installation. This pump comes standard with a Regulating Unloader and fixed Chemical Injector that mounts onto the unloader.


  • Pulsar 3 Adjustable Unloader Valve
  • 1" Shaft
  • 3400 RPM
  • Brass Water Filter
  • External Loop Bypass Hose
  • Thermal Relief Valve For Better Pump Protection
  • Brass Manifold
  • Oversized Connecting Rods
  • Oil Level Sight Glass

Assembled in the USA


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