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Hypro D403 Diaphragm Pump - 9910-D403

  • Front of the Hypro 9910-D403 Diaphragm Pump.
  • Back of the Hypro 9910-D403 Diaphragm Pump shown with a flanged 3-bolt shaft.
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Product Description

DISCONTINUED, PLEASE REFER TO AR403  The Hypro D403 Diaphragm Pump (9910-D403) is the second most used pump in the agricultural, lawn care, and landscaping industries. The D403 medium-pressure diaphragm pump is best suited for pumping and spraying herbicides, pesticides, liquid fertilizers, and other hard-to-handle fluids.

A low-cost maintenance and almost wear-free operation result from Hypro's oil-bath design and premium quality synthetic diaphragms, so the Hypro D403 will have a longer life, since it is compatible with corrosive, abrasive, and many common agricultural chemicals, providing you with greater reliability in the field.

The pressure and output implement the best performance possible for small to medium-sized sprayers, so it is common to find the D403 used on weed / lawn sprayers and Lesco Space Saver spray units. The combined volume and pressure of 10 GPM and 580 PSI allow you to attain spray heights of up to 40' high when using the proper hose and spray gun. The Hypro D403 also functions as a hydrostatic test pump for pressure testing pipes and sewers.

The 9910-GR40 Pressure Regulator (sold separately) is required for the D403. If you want a modified D403 that includes a Gearbox and Pressure Regulator ready to attach to a gas engine with a 3/4" keyed shaft, then the Hypro D403GRGI (sold separately) is recommended.

This Hypro D403 diaphragm pump can be adapted to a male 1 3/8"-6 splined PTO shaft (KIT 2200), female 1 3/8"-6 splined PTO shaft (KIT 1704), 1" solid shaft (KIT 2202), or gear reduction drive options (KIT 1640).


  • Max. Flow: 10 GPM
  • Max. Pressure: 580 PSI
  • Max. Rated Speed: 550 RPM
  • Max. Fluid Temperature: 140° F (60° C)


  • Port Sizes: 1" hose barb inlet, two 1/2" NPT hose barb outlets
  • Shaft: Flanged (3 bolt) for kit attachment
  • Pump Shaft Rotation: CW and CCW (bi-rotational)
  • Diaphragms: 3 semi-hydraulic diaphragms
  • Aluminum Crankcase Oil Capacity: 13 ounces
  • Housing: Anodized aluminum
  • Adaptable to PTO, hydraulic, electric motors, or gas engines
  • Weight: 20.9 lbs.
  • Mounting base
  • Recommended regulator for this pump: 9910-GR40 (sold separately)
  • Recommended gear reduction for this pump: 9910-KIT1640 (sold separately)
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