AAA PowerBoost
Score: 88/100Kärcher Pressure Washer Pump
Score: 85/100Rankings
The AAA 3700 PSI pump is a high-performance triplex replacement featuring brass heads and ceramic pistons for superior durability and cleaning power. Its adjustable unloader and thermal protection make it a robust choice for heavy-duty tasks. It is best suited for DIY homeowners or semi-pros with gas pressure washers needing a reliable, long-lasting upgrade.
The Kärcher Legacy Vertical Axial Pump is a residential-grade pressure washing pump designed for direct coupling to gas engines, delivering 2.6 GPM at 3000 PSI. It features a durable brass head and integrated thermal relief valve, though its fixed flow rate limits performance for large-area jobs. Best suited for homeowners performing regular maintenance cleaning of driveways, patios, and decks.
| Attribute | | Kärcher Pressure Washer Pump |
|---|---|---|
3,700 PSIbest | 3,000 PSI | |
2.5 GPM | 2.6 GPMbest | |
0.75 inches | 0.875 inchesbest | |
12 inchesbest | — | |
3,600 RPMbest | 3,400 RPM | |
0.75 inchesbest | 0.5 inches | |
— | 0.375 inchesbest | |
0.063 quartsbest | — |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | | Kärcher Pressure Washer Pump |
|---|---|---|
Performance(4) | ||
Maximum Pressure (PSI) | 3700 PSI | 3000 PSI |
Flow Rate (GPM) | 2.5 GPM | 2.6 GPM |
Pump Type | Triplex Plunger | Axial |
Operating RPM (RPM) | 3600 RPM | 3400 RPM |
Compatibility & Mounting(4) | ||
Shaft Diameter (inches) | 0.75 inches | 0.875 inches |
Shaft Type | Horizontal | Hollow Vertical |
Inlet Port Size (inches) | 0.75 inches | 0.5 inches |
Outlet Port Size (inches) | M22 inches | 0.375 inches |
Durability & Maintenance(1) | ||
Seal System | Advanced Oil Seal | Brass |
Physical(1) | ||
Product Weight (lbs) | 9.0 lbs | 8.0 lbs |
Products in the top-left offer the best value (high score, low price).
Professional reviewers praise the pump for surpassing expectations in harsh conditions, highlighting the PowerBoost technology and easy-start unloader.
Users appreciate the easy oil checks, adjustable power, and quick setup, noting robust build quality and compatibility with popular engines like Honda GX200.
Professional reviewers and industry experts categorize the Kärcher Legacy 26/30 line as a proven, residential-grade component that occupies a sweet spot for home equipment. It balances the flow of smaller pumps with the full 3000 PSI needed for typical home cleaning without excessive weight or cost.
Everyday users generally praise the pump for its reliable performance in residential applications, noting lower vibration and smoother operation compared to direct-drive alternatives. Common recurring issues include insufficient pressure for heavily soiled surfaces, limited flow rate for large areas, and water mineral buildup in hard-water regions.
