Cat Pumps 4DNX27GSI Triplex Pump – 2.7 GPM @ 3000 PSI, 3450 RPM, 3/4" Shaft

Part Number: 4DNX27GSI
Category: Pressure Washing & High-Pressure Pump Systems
Type: Cat Pumps 4DNX27GSI Triplex Pump – 2.7 GPM @ 3000 PSI, 3450 RPM, 3/4" Shaft

The Cat Pumps 4DNX27GSI is a compact, high-performance triplex pressure washer pump engineered for direct-drive gas engine systems. Delivering 2.7 GPM at 3000 PSI, this model provides a noticeable flow upgrade over standard 2.5 GPM units while maintaining the same lightweight, portable form factor—making it ideal for contractor-grade and residential pressure washer builds.

Product Specifications

• Model: 4DNX27GSI

• Type: Triplex Pressure Washer Pump

• Flow Rate: 2.7 GPM

• Max Pressure: 3000 PSI

• Operating Speed: 3450 RPM

• Shaft: 3/4" Solid Gas Engine Shaft

• Bore Diameter: 14mm

• Stroke: 7.2mm

• Weight: 10.7 lbs

• Condition: New

Features & Benefits

• Increased flow output at 2.7 GPM for faster cleaning

• Triplex plunger design for smoother operation and extended pump life

• Direct-drive 3/4" shaft fits most small gas engines

• Compact and lightweight for portable pressure washer systems

• High-speed operation up to 3450 RPM

• More durable and serviceable than axial-style pumps

• Ideal for residential, contractor, and light commercial applications

• Excellent replacement or upgrade for worn direct-drive pumps