CAT 4PPX30GSI Pressure Washer Pump – 2.7 GPM @ 3300 PSI, 3400 RPM, 3/4″ Shaft, Gas, Internal Unloader

Part Number: 4PPX30GSI
Category: Pressure Washer Pumps
Type: Gas Direct-Drive Pump – CAT 4PPX30GSI, 2.7 GPM @ 3300 PSI

The CAT 4PPX30GSI Pressure Washer Pump is a compact, high-performance direct-drive pump designed for gas-powered pressure washers operating at 3400–3450 RPM. Delivering 2.7 GPM at up to 3300 PSI, this pump features an internal unloader for simplified plumbing and a 3/4″ solid shaft for direct engine mounting. Built by CAT Pumps with a durable triplex plunger design, it provides smooth output, long service life, and dependable performance in residential and light commercial cleaning applications.

Product Specifications

• Pump Model: 4PPX30GSI

• Manufacturer: CAT Pumps

• Pump Type: Triplex Plunger, Direct Drive (Gas)

• Flow Rate: 2.7 GPM

• Max Pressure: 3000–3300 PSI

• Rated Speed: 3400–3450 RPM

• Shaft Size: 3/4″ Solid

• Bore Diameter: 14 mm

• Stroke: 7.2 mm

• Unloader: Internal (Integrated)

• Weight: 11 lb

• Condition: New

Features & Benefits

• Genuine CAT Pumps construction for long-term reliability

• Integrated internal unloader for simplified installation

• Compact, lightweight design for portable units

• Triplex plunger design for smooth, low-pulsation output

• Ideal for high-speed direct-drive gas engines

• Excellent balance of pressure and flow for everyday cleaning

Applications

• Gas-powered pressure washers

• Residential and light commercial cleaning equipment

• Replacement pump for compatible direct-drive systems

• Portable pressure washer builds and repairs

Important Notes

• Verify shaft size (3/4″) and engine RPM compatibility (3400–3450) before ordering

• Designed for direct-drive gas engines

• Final operating PSI and GPM depend on engine speed and overall system configuration