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Udor Iota 20 GR Diaphragm Pump

  • Includes a Gear Reduction for use with 3-5 HP gas engines with 3/4" shafts.
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Product Description

The Udor Iota-20/GR Diaphragm Pump is an Iota 20 with the addition of a gear reduction for 3-5 HP gasoline engines with 3/4" shafts.

It is a positive displacement, low-pressure, twin diaphragm pump that is internally manifolded with anodized aluminum construction.

With its Desmopan diaphragms and durable stainless steel check valves, the Udor-20/GR can handle the pumping of common agricultural chemicals such as herbicides, pesticides, liquid fertilizers, de-icing materials, and other hard-to-handle fluids.

The Udor Iota-20/GR finds great use for weed, pest, and insect control, tree spraying, hydrostatic testing, concrete seal coating and cleaning, concrete curing compound, and fluid transferring for many agricultural, horticultural, and lawn care applications.

Important: Protect your pumps from freezing – flush the pump and system with a 50/50 mixture of antifreeze and water if freezing conditions are present.


  • Max. Flow: 5.0 GPM
  • Max. Pressure: 275 PSI
  • Max. Rated Speed: 3600 RPM (when gas engine mounted)
  • Max. Fluid Temperature: 140º F (60º C)


  • Equipped with: Gear Reduction for 3-5 HP gas engines with 3/4" shafts, a built-in pulsation dampener, and a control unit with adjustable pressure regulator, manual dump lever, and pressure gauge
  • Port Sizes: 3/4" inlet, 3/8" outlet, 5/8" bypass
  • Pump Shaft Rotation: CW and CCW (bi-rotational)
  • Housing: Anodized aluminum
  • Diaphragms: 2 Desmopan diaphragms
  • Large capacity oil-bath crankcase
  • Visual oil sight gauge
  • Stainless steel check valves
  • Self-priming pump can be run dry
  • Weight: 17 lbs.
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