Udor KAPPA 43 GR3/4LP — 10.5 GPM (40 L/min) Diaphragm Pump

The KAPPA 43 GR3/4LP takes the same high-flow KAPPA 43 pump and pairs it with a low-pressure version of the petrol gear reduction drive, capping output at 24 bar (350 PSI) rather than the standard 38 bar. Flow stays at 40.0 L/min (10.5 GPM), making this the pick for jobs that need volume over pressure, such as broadacre boom spraying where lower pressure reduces drift. It mounts onto the same 3/4 inch, 4–6.5 HP petrol engine shaft as the standard GR3/4, at the same 39 lb weight.

Specifications

Model	Udor KAPPA 43 GR3/4LP
Flow Rate	40 L/min (10.5 GPM)
Max Pressure	24 bar (350 PSI)
Speed	550 RPM
Drive Configuration	Low-pressure gear reduction for 3/4″ shaft petrol engine, 4-6.5 HP
Weight	17.7 kg (39 lbs)
Type	Diaphragm Pump

Applications

• Broadacre boom spraying where lower pressure reduces drift
• High-volume, low-pressure liquid application
• Fertiliser and herbicide boom work
• Petrol-powered spray trailers
• Contractor rigs prioritising flow over pressure

Key Features

• Low-pressure gear reduction for 3/4 inch petrol engine shaft, 4–6.5 HP
• 24 bar (350 PSI) maximum pressure, tuned for high-volume work
• 40.0 L/min (10.5 GPM) flow
• Desmopan diaphragm, anodised aluminium body
• Shares its pump body with the standard KAPPA 43 GR3/4

Technical Documents

• Udor KAPPA 43 GR3/4LP Parts Schematic (PDF)
• All Udor Kappa Series Documents

Parts & Service

AES Waterblasters carries genuine Udor spare parts, diaphragm kits and valve kits for the Kappa series, with expert service and repairs from our Auckland workshop. Contact us on 09 271 4782 for parts, servicing or advice on the right pump for your application.

Related Models

Part of the Udor Kappa Series. Other models in this series:

• Udor KAPPA 7 12-Volt — 7.6 L/min (2 GPM)
• Udor KAPPA 15 12-Volt — 13.3 L/min (3.5 GPM)
• Udor KAPPA 15 GR3/4 — 13.3 L/min (3.5 GPM)
• Udor KAPPA 18 DC — 16 L/min (4.2 GPM)
• Udor KAPPA 32 — 36 L/min (9.5 GPM)
• Udor KAPPA 43 GR3/4 — 40 L/min (10.5 GPM)