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Comet MP20 Diaphragm Pump

  • This version does NOT include a pressure regulator and gear reducer.
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Product Description

The Comet MP20 Diaphragm Pump is a medium pressure, two-diaphragm pump that is used for many professional spraying applications involving pest control, lawn care, agriculture, carpet cleaning, hydrostatic testing, spraying treatments of medium-sized crops, and more.

The Comet MP20 twin diaphragm pump is capable of handling a range of common agricultural chemicals, including herbicides, pesticides, insecticides, fertilizers, abrasives, de-icing materials, and other hard-to-handle fluids. Its large capacity oil bath crankcase does an excellent job separating the chemicals from the internal seals, ensuring compatibility with many common agricultural chemicals.

Every diaphragm pump requires the use of a pressure regulator, and we recommend using the Comet 1204.0560.00 Regulator (sold separately) for attaching to the Comet MP20.

This version does not include a pressure regulator and gear reducer. The Comet MP20-GR version (sold separately) comes with a pressure regulator and gear reducer. 


  • Max. Flow: 5 GPM
  • Max. Pressure: 435 PSI
  • Max. Rated Speed: 550 RPM
  • Max. Fluid Temperature: 104° F (40° C)


  • Does not include a pressure regulator and gear reducer
  • With universal drive face and mounting rails
  • Port Sizes: 7/8" inlet (outlet and bypass port determined by control unit chosen)
  • Shaft: 6 hole flange
  • Pump Shaft Rotation: CW and CCW (bi-rotational)
  • Diaphragms: 2 semi-hydraulic diaphragms
  • Construction: Anodized aluminum
  • Adaptable to PTO, gas engine, or hydraulic motors
  • Self-priming pump can be run dry
  • Weight: 14.6 lbs.
  • Recommended regulator to use with this pump: Comet 1204.0560.00 Regulator 
  • Recommended gear reducer to use with this pump: Comet 5005.0216.00 Gear Reducer
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