Westinghouse ePX3500 Electric Pressure Washer, 2500 Max PSI 1.76 Max GPM with Anti-Tipping Technology, Onboard Soap Tank, Pro-Style Steel Wand, 5-Nozzle Set, for Cars/Fences/Driveways/Home/Patios vs Westinghouse Universal 16.5” Pressure Washer Surface Cleaner Attachment - Stainless Steel - 4400 Max PSI, 1/4” Connector - for Gas and Electric Pressure Washers

Performance and Pressure Output

The Westinghouse ePX3500 delivers 2500 max PSI and 1.76 max GPM, while the Universal 16.5” Surface Cleaner Attachment is rated for up to 4400 PSI. The surface cleaner attachment offers significantly higher pressure output—nearly 76% more than the electric washer—making it ideal for tackling extremely stubborn grime on large flat surfaces like driveways or concrete walls. However, the ePX3500’s 1.76 GPM flow rate provides greater water volume, which enhances cleaning efficiency when combined with pressure. The surface cleaner’s high PSI is impressive but limited to a single attachment function, whereas the ePX3500 is a complete system designed for versatile use across multiple cleaning tasks.

Portability and Design

The Westinghouse ePX3500 measures just 16.5 inches tall and weighs only 19 pounds, making it compact and lightweight for easy storage and transport. Its low center of gravity and four-wheel steering with anti-tipping technology enhance stability during use. In contrast, the Universal 16.5” Surface Cleaner Attachment is a standalone tool without built-in mobility features—it lacks wheels, handles, or any integrated design for portability. While both share the same 16.5-inch dimension, only the ePX3500 functions as a full-pressure washing system with ergonomic handling. The attachment must be used in conjunction with another pressure washer, limiting its independence.

Cleaning Versatility and Attachments

The ePX3500 comes with a five-nozzle set (0°, 15°, 25°, turbo, and soap applicator), a pro-style steel wand, and an onboard 20-ounce soap tank, enabling users to switch between spray patterns and apply detergents directly. This makes it suitable for cleaning cars, fences, patios, and garage floors with minimal setup. The Universal 16.5” Surface Cleaner Attachment, by comparison, is designed exclusively for large, flat surfaces such as decks and driveways. It does not include additional nozzles or detergent capabilities and cannot be used for detailed cleaning tasks. Its singular purpose limits versatility compared to the ePX3500’s multi-functional toolkit.

Compatibility and System Integration

The ePX3500 is an all-in-one electric pressure washer system that operates independently and includes a 25-foot hose, trigger gun, and quick-connect fittings. It is designed for direct use with standard household outlets. The Universal 16.5” Surface Cleaner Attachment requires compatibility with existing gas or electric pressure washers via a 1/4” quick-connect fitting. It cannot function alone and depends entirely on another machine’s power source. Therefore, the ePX3500 offers full integration and self-sufficiency, while the attachment serves only as an add-on accessory.

Price and Value Comparison

The Westinghouse ePX3500 is priced at $169.00, while the Universal 16.5” Surface Cleaner Attachment costs $89.99—about 47% less. However, the price difference reflects their fundamentally different roles: the ePX3500 is a complete cleaning system, whereas the attachment is a specialized tool. Purchasing the attachment alone does not provide a functional pressure washer. For users seeking a full solution, the ePX3500 represents better value despite its higher upfront cost. The attachment may be a cost-effective upgrade for those already owning a compatible pressure washer.

Warranty and Support

The ePX3500 comes with a 3-year limited service, labor, and parts coverage backed by nationwide customer support. This extended warranty reflects the product’s complexity and long-term reliability expectations. In contrast, the Universal 16.5” Surface Cleaner Attachment carries only an 180-day limited warranty. The longer warranty on the ePX3500 underscores its status as a core appliance rather than a supplementary part. Customers investing in the ePX3500 gain greater peace of mind and long-term support, especially given its role in frequent household cleaning tasks.

Which should you buy?

If you need a complete, self-contained pressure washing system for regular cleaning of vehicles, driveways, fences, and outdoor furniture, the Westinghouse ePX3500 is the clear choice. It offers superior versatility, integrated detergent storage, anti-tipping design, and a 3-year warranty—features absent in the attachment. At $169.00, it’s about 88% more expensive than the $89.99 Universal 16.5” Surface Cleaner Attachment, but this price reflects a fully functional unit, not just a nozzle. The attachment, while powerful at up to 4400 PSI, is only useful if you already own a compatible pressure washer. For first-time buyers or those wanting a turnkey solution, the ePX3500 delivers unmatched value and functionality.