CAT 4PPX25GSI Pressure Washer Pump – 2.5 GPM @ 3300 PSI, 3400 RPM, 3/4″ Shaft, Gas, Internal Unloader

Part Number: 4PPX25GSI
Category: Pressure Washer Pumps
Type: Gas Direct-Drive Pump – CAT 4PPX25GSI, 2.5 GPM @ 3300 PSI

The CAT 4PPX25GSI Pressure Washer Pump is a compact, high-performance direct-drive pump engineered for gas-powered pressure washers operating at 3400 RPM. Delivering 2.5 GPM at up to 3300 PSI, this pump features a 3/4″ hollow shaft with a gas engine flange for easy direct mounting. Built with a durable brass manifold, and equipped with a built-in unloader and chemical injector, it offers a clean, simplified setup with reliable CAT Pumps performance for residential and light commercial applications.

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Product Specifications

• Pump Model: 4PPX25GSI

• Manufacturer: CAT Pumps

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

• Flow Rate: 2.5 GPM

• Max Pressure: 3300 PSI

• Rated Speed: 3400 RPM

• Shaft Size: 3/4″ Hollow

• Manifold: Brass

• Inlet Port: 3/8″ FPT

• Outlet Port: 3/8″ MPT

• Unloader: Internal (Built-In)

• Chemical Injector: Integrated

• Condition: New

Features & Benefits

• Genuine CAT Pumps construction for long-term reliability

• Built-in unloader and chemical injector for simplified plumbing

• 3/4″ hollow shaft with gas engine flange for direct mounting

• Compact, lightweight design for portable units

• Triplex plunger design for smooth, low-pulsation output

• 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 type (3/4″ hollow) and engine RPM compatibility (3400) before ordering

• Designed for direct-drive gas engines

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