Rainbow Continuous Prime Pumping Units

Irrigation Generator Sets

Irrigation Generator Sets

Rainbow’s thirty + years of pumping experience has resulted in the introduction of the “RAINBOW R-PRIME SERIES PUMPING UNITS.” We are now offering a complete line of automatic self-priming pumps available for use in all of your dewatering, slurry, and land application needs.

So for your next and future pumping unit, go with the combination of knowledge that has resulted in quality and service for over thirty years. RAINBOW MANUFACTURING COMPANY wants to be the name you know and trust for all your pumping needs.

Are you looking for a Self Priming Pump? Rainbow Manufacturing Company offers a variety of Self Priming Water Pumps, Self Priming Centrifugal Pumps, and also a Small Self Priming Pumps. For more information on a Self Priming Pump contact Rainbow Manufacturing Company.

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  • Flow Rates Up to 2000 GPM
  • Pressure Range up to 130 PSI
  • Grade 30 Grey Cast Iron Pump
  • Main Frame: One Piece Precision Machined Grey Cast Iron
  • Wear Rings: Replaceable Nickel/Bronze Alloy
  • Volute: Precision Machined Grey Cast Iron can be rotated in increments of 45 Deg. for different discharge positions
  • Shaft Seals: Both Packing Box and Mechanical Seal
  • Close-Coupled Electric Motor Drive Mounting


  • Rainbow Cast Iron Centrifugal Pump with 5-year warranty.
  • Nema Standard U.S. Motors or Marathon electric motors.
  • Pump Control Panels available for Across the Line or Part Wind Starting.
  • Available in Open Drip Proof or Totally Enclosed Fan Cooled.
  • Easily Serviced and Maintained.
  • Impeller keyed to Shaft and Balanced to eliminate vibration and provide smooth, quiet operation.