SIMPSON 4500 PSI Pressure Washer Gun 80148 — Universal M22 Cold-Water with Ergonomic Trigger & 360° Assist Handle

The SIMPSON 80148 is a universal cold-water pressure-washer spray gun rated up to 4500 PSI that replaces or upgrades existing guns with industry-standard M22 threaded connections.

Built for homeowners and pros who need a durable, comfortable trigger gun, the SIMPSON 4500 PSI Pressure Washer Gun combines an ergonomic pull trigger, safety lock-out, and a 360° rotating side assist handle for better control on stairs, roofs, and uneven surfaces. It includes a threaded M22 quick-connect hose adapter so it connects quickly to most high-pressure hoses and wands. Designed for cold-water applications, this gun suits a wide range of cleaning tasks from vehicle detailing to concrete and siding maintenance.

How does this gun fit my pressure washer?

The SIMPSON 80148 uses industry-standard M22 threads on both the wand and hose connections, so it attaches to most pressure washers and high-pressure hoses that support M22 fittings. The package also includes a threaded M22 quick-connect hose adapter for easier hookup.

• Thread type: M22 female on wand, M22 male on high-pressure hose
• Adapter included: threaded M22 QC hose adapter
• Compatibility: works with most washers using M22 connections

What performance limits and conditions should I expect?

This gun is rated for a maximum of 4500 PSI and 6.6 GPM, with a maximum fluid temperature of 140°F, and is intended only for cold-water cleaning. Stay within these specifications to maintain safety and product longevity.

• Maximum pressure: 4500 PSI
• Maximum flow: 6.6 GPM
• Maximum fluid temperature: 140°F (cold-water use only)

What comfort and safety features improve handling?

Ergonomics and safety are central to the design: a comfortable, easy-pull trigger reduces hand fatigue during extended jobs, and a safety lock-out helps prevent accidental spraying. The 360° rotating side assist handle gives a secure two-handed grip and better torque control when working at awkward angles.

• Ergonomic trigger reduces strain during long use
• Trigger safety lock prevents unintended discharge
• 360° rotating side assist handle for stable two-handed operation

Can this unit replace my worn or damaged spray gun?

Yes—the SIMPSON 80148 is offered as a replacement or an upgrade for most pressure washer guns that meet the PSI, GPM, and M22 thread specifications. It is built to professional style standards to handle typical residential and commercial cleaning jobs.

• Use as a direct replacement for guns with matching specs
• Suitable as an upgrade for increased comfort and control
• Intended for common tasks: cars, driveways, patios, siding, decks

Who is this for? The SIMPSON 4500 PSI Pressure Washer Gun 80148 is aimed at homeowners, contractors, and rental shops needing a rugged, universally compatible spray gun for cold-water cleaning. It’s a smart pick if you want an easy-to-connect replacement with improved ergonomics and safety for frequent or heavy-duty washing tasks.