McKillans Foam Cannon for Pressure Washer - Car vs WattFlo Pressure Washer, Power Washer with 500ml Foam
Updated August 2026 — WattFlo Pressure Washer, Power Washer with 500ml Foam leads on price and weight.
The McKillans Foam Cannon is a budget-friendly option focused on car washing, while the WattFlo Pressure Washer offers versatility and power for various cleaning tasks.
Why McKillans Foam Cannon for Pressure Washer - Car is better
Price
McKillans is $40.01 cheaper.
Foam Control
More adjustable foam output.
Durability
High-quality brass connectors.
Why WattFlo Pressure Washer, Power Washer with 500ml Foam is better
Versatility
Includes multiple nozzles for various tasks.
Power
2.5 GPM maximum flow rate.
All-in-One
Combines pressure washer and foam cannon.
Overall score
Specifications
| Spec | McKillans Foam Cannon for Pressure Washer - Car | WattFlo Pressure Washer, Power Washer with 500ml Foam |
|---|---|---|
| Brand | McKillans | WattFlo |
| Foam Cannon | Yes | Yes |
| Nozzles | None | 4 |
| Warranty | 1 Year | None |
| Material | Plastic/Brass | Plastic |
Dimension comparison
Overview of Products
The McKillans Foam Cannon for Pressure Washer is priced at $49.98, making it a budget-friendly option for car enthusiasts looking for effective cleaning tools. In contrast, the WattFlo Pressure Washer retails for $89.99, offering a built-in foam cannon and a variety of nozzles for versatile cleaning. The price difference of $40.01 means the McKillans product is about 44% cheaper than the WattFlo. While both serve the purpose of cleaning, their features and functionalities cater to different user needs.
Design and Build Quality
The McKillans Foam Cannon boasts a wide mouth design that allows for easier soap dilution and provides a stable base, minimizing the risk of spills during use. Its connectors are made from high-quality brass, enhancing durability under high pressure. On the other hand, the WattFlo Pressure Washer features a compact design with onboard storage for nozzles and foam cannon, making it space-efficient. However, while the McKillans is designed specifically for foam application, the WattFlo combines a pressure washer with a foam cannon, appealing to users seeking an all-in-one cleaning solution.
Foam Quality
When it comes to foam quality, the McKillans Foam Cannon is designed to produce thicker foam that provides a more effective cleaning experience, loosening dirt and contaminants without scratching the car's surface. The adjustable control knob allows for customization of foam output, catering to different cleaning needs. In contrast, the WattFlo's 500ml foam cannon also aims to deliver thick foam, but it is integrated into a more complex system that includes a powerful 2.5 GPM maximum flow rate, which may result in a different foam quality depending on the pressure settings. Both products excel in foam generation, but the McKillans offers more user control over the foam thickness.
Versatility of Use
The WattFlo Pressure Washer excels in versatility, equipped with four quick-connect nozzles (0°, 15°, 25°, and 40°) that facilitate a range of cleaning tasks from driveways to vehicles. This feature enhances its usability across various surfaces, making it an attractive option for users needing a multi-functional cleaner. The McKillans Foam Cannon, while excellent for car washing, is limited to foam application, making it less versatile for other cleaning tasks. If versatility is a priority, the WattFlo clearly has the upper hand.
User Experience
The McKillans Foam Cannon is designed for ease of use, featuring a translucent bottle that allows users to monitor soap levels easily. Its adjustable foam output and angle provide a tailored cleaning experience, which many users appreciate. However, it is essential to note that the McKillans Foam Cannon is meant to be used with a separate pressure washer, while the WattFlo integrates both functions in one unit, potentially simplifying the user experience for those who prefer a single device. Each product brings a unique user experience, with the McKillans providing focused foam application and the WattFlo offering comprehensive cleaning capabilities.
Power and Performance
In terms of power, the WattFlo Pressure Washer stands out with its maximum flow rate of 2.5 GPM, which enables efficient cleaning of tough stains and large areas. This level of power is particularly beneficial for extensive cleaning tasks, such as driveways and patios. Conversely, the McKillans Foam Cannon relies on the pressure output from a compatible pressure washer, meaning its performance can vary based on the machine used. For users looking for robust performance without needing a separate unit, the WattFlo is the more powerful choice.
Maintenance and Durability
Both products emphasize durability, but they target different aspects of maintenance. The McKillans Foam Cannon features high-quality brass connectors and a strong plastic body, ensuring longevity in usage. Its design minimizes the risk of leaks, which is crucial for maintaining foam quality. The WattFlo Pressure Washer is also built for durability, designed to withstand frequent use with its onboard storage for components. However, as a more complex system, it may require additional maintenance compared to the simple design of the McKillans. In terms of ease of maintenance, the McKillans might be easier to handle due to its straightforward design.
Which should you buy?
Choosing between the McKillans Foam Cannon and the WattFlo Pressure Washer ultimately depends on your specific cleaning needs. If you are looking for an economical and efficient foam cannon that specializes in car washing, the McKillans at $49.98 is an excellent choice. However, if you want a more versatile cleaning solution that can tackle a variety of surfaces with powerful performance, the WattFlo Pressure Washer priced at $89.99 may be worth the investment. Consider your cleaning tasks and budget before making a decision, as both products cater to different user preferences.

