Viper VV4G42G Pressure Washer Pump – Direct Drive, 4.0 GPM @ 4200 PSI

Part Number: VV4G42G
Category: Pressure Washer Pumps
Type: Gas Direct-Drive Pump – Viper VV4G42G, 4.0 GPM @ 4200 PSI

The Viper VV4G42G Pressure Washer Pump is a high-output direct-drive pump built for gas-powered pressure washers operating at 3400 RPM. Delivering a powerful 4.0 GPM at up to 4200 PSI, this pump is designed for demanding residential and light commercial applications that require both high flow and extreme pressure. Featuring a 1″ hollow shaft and a rugged triplex plunger design, the VV4G42G provides smooth performance, long service life, and dependable cutting power in high-speed direct-drive systems.

Manufactured by Viper, this pump is engineered to handle tougher cleaning tasks such as concrete, heavy equipment, and large surface areas while maintaining consistent pressure and flow.

Product Specifications

• Pump Model: VV4G42G

• Manufacturer: Viper

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

• Flow Rate: 4.0 GPM

• Max Pressure: 4200 PSI

• Rated Speed: 3400 RPM

• Shaft Size: 1″ Hollow

• Bore Diameter: 15 mm

• Stroke: 9.2 mm

• Weight: 19 lb

• Condition: New

Features & Benefits

• High-output 4.0 GPM / 4200 PSI performance

• Triplex plunger design for smooth, low-pulsation operation

• 1″ hollow shaft for direct mounting on gas engines

• Built for high-speed 3400 RPM operation

• Heavy-duty construction for extended service life

• Ideal for demanding cleaning applications requiring maximum power

Applications

• Gas-powered pressure washers

• Residential and light commercial cleaning equipment

• Replacement pump for compatible direct-drive systems

• Heavy-duty portable pressure washer builds

Important Notes

• Verify shaft type (1″ 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