AAA 90039
Score: 92/100
BMotorParts Stihl RB800 Pump
Score: 88/100Rankings
The AAA 90039 is a professional-grade horizontal triplex plunger replacement pump delivering 4000 PSI and 3.5 GPM. It features durable components like forged brass heads and ceramic pistons, making it ideal for heavy-duty industrial tasks. However, it strictly requires an 11 HP engine and is not suitable for underpowered units.
The STIHL RB 800 is a commercial-grade, gasoline-powered high-pressure washer designed for heavy-duty industrial cleaning tasks, featuring a powerful 429 cc Kohler engine. Its exceptional pressure and flow rates make it ideal for removing heavy grime, though its massive weight and size limit it to stationary professional use. It is best suited for professional contractors and industrial cleaners requiring daily heavy-duty performance.
| Attribute | | |
|---|---|---|
4,000 PSI | 4,200 PSIbest | |
3.5 GPM | 4 GPMbest | |
1 inchesbest | — | |
0.75 inchesbest | — | |
0.375 inchesbest | — | |
11 quartsbest | — | |
| ↓ lower better | 14 lbsbest | 168 lbs |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | | |
|---|---|---|
Performance(3) | ||
Maximum Pressure (PSI) | 4000 PSI | 4200 PSI |
Flow Rate (GPM) | 3.5 GPM | 4.0 GPM |
Pump Type | Horizontal Triplex Plunger | Triplex |
Compatibility & Mounting(4) | ||
Shaft Diameter (inches) | 1.0 inches | inches |
Shaft Type | Hollow | |
Inlet Port Size (inches) | 0.75 inches | inches |
Outlet Port Size (inches) | 0.375 inches | inches |
Durability & Maintenance(1) | ||
Oil Capacity (quarts) | 11 quarts | quarts |
Physical(1) | ||
Product Weight (lbs) | 14.0 lbs | 168 lbs |
Features & Control(1) | ||
Unloader Type | Adjustable Hand Turn Knob | Adjustable |
Safety & Features(2) | ||
Thermal Relief Valve | true | |
Max Water Temperature (°F) | N/A °F | °F |
Products in the top-left offer the best value (high score, low price).
Professional reviewers from sources like Simpson Cleaning and Ferguson praise the AAA 90039 for its engineered efficiency and durability, highlighting its PowerBoost technology and dual bearings as key advantages for tough environments.
Everyday users generally view the pump as a cost-effective replacement that extends the life of existing pressure washers. Common praise focuses on its reliability for heavy-duty cleaning and ease of installation.
Professional reviewers and editors position the STIHL RB 800 as the premier choice for industrial and commercial heavy-duty applications. They praise its 429 cc Kohler engine, industrial-grade durability, and features like the anti-vibration system and easy-start mechanism. Video demos and dealer insights emphasize its ability to save time through high flow rates and its robust construction, describing it as 'built to last' for professional contractors.
Everyday user feedback, primarily from video demonstrations, highlights the machine's exceptional power and versatility. Users appreciate the ability to adjust pressure for different tasks, such as washing vehicles without damage, and value the ease of maintenance due to the oil-bath pump. There are no recurring complaints, but the consensus is that the product is strictly for professionals due to its weight and power.
“doubles time savings on washing”
“built to last”
