McKillans Foam Cannon for Pressure Washer
- Pressure Washer
- 0.3 gallons
- Gas
- 1
- Better rated than 65%
A wide-mouth foam cannon with brass fittings and adjustable foam output, built to work across electric and gas pressure washers.
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How it ranks among the 20 pressure washers we track
4.6★ across 2,000 Amazon ratings, Bayesian-smoothed toward the category average.
2,000 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
1,000+ bought on Amazon last month.
Brand identity, imagery, description and spec coverage.
The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 20 pressure washers we track - how the scorecard works · full pressure washers data report. Confidence: high - strong rating volume and complete data.Updated 7 days ago. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
Overview
The McKillans foam cannon attaches to a pressure washer to mix soap into a thick foam for car washing, with a wide-mouth bottle for easier dilution and a 1/4-inch quick connector for hookup.
Foam cannons work by forcing water through a venturi that pulls soap concentrate from the bottle, and the wide mouth here is meant to make mixing less fiddly than narrow-neck designs. Brass and stainless connectors are the parts most prone to failure on cheaper cannons, and the seller points to those as upgraded here. It's rated to work with both electric and gas pressure washers.
- Wide-mouth soap bottle
- Brass and stainless steel connectors
- Adjustable foam output and spray angle
- 1/4-inch quick connector
Who it's for
Anyone washing a car, truck, or driveway regularly with a pressure washer who wants a cushioning layer of foam ahead of the wash mitt. Not useful without a compatible pressure washer to drive it.
Strengths and trade-offs
Drawn from this product's published specifications.
- Wide mouth bottle simplifies soap dilution
- Works with electric or gas pressure washers
- Adjustable foam thickness and spray angle
- Translucent bottle shows soap level
- Requires a separate pressure washer to function
- 1/4-inch connector may need an adapter for some machines
Performance notes
A control knob at the top adjusts how much foam comes out, and a separate adjustment changes the spray angle, so the stream can go from a narrow jet to a wide fan of foam. The translucent bottle lets you see remaining soap level without opening it mid-wash.
Specifications
| Brand | McKillans |
|---|---|
| Model | RH-G6RF-BQ84 |
| Dimensions & fit | |
| Item Weight | 1.37 pounds |
| Capacity & performance | |
| Tank Volume | 0.3 gallons |
| Maximum Flow Rate | 2.5 gpm |
| Power & efficiency | |
| Power Source | Gas |
| Construction & materials | |
| Color | Brass |
| Included components | |
| Unit Count | 1 |
| Other details | |
| Item Type Name | Wide Mouth Foam Cannon |
| Maximum Pressure | 3000 psi |
| Specification Met | CE, RoHS |
Other McKillans pressure washers
How it compares
This product against the closest alternatives we track in pressure washers.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| McKillans Foam Cannon for Pressure WasherThis product | 4.6 / 5 | 2,000 | 4.4 / 5 |
| STA-BIL Pump ProtectorSTA-BIL | 4.8 / 5 | 7,800 | 4.8 / 5 |
| Westinghouse ePX3500 Electric Pressure WasherWestinghouse | 4.6 / 5 | 9,000 | 4.6 / 5 |
| 35pcs Air Pump Needle35pcs | 4.6 / 5 | 1,800 | 4.5 / 5 |
| CRAFTSMAN Electric Pressure WasherCraftsman | 4.3 / 5 | 3,500 | 4.5 / 5 |
Similar pressure washers from other brands
Questions about the McKillans RH-G6RF-BQ84
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
Does the McKillans foam cannon work with electric pressure washers?
Yes, the seller states it works with both electric and gas powered pressure washers.
Can I adjust how thick the foam comes out?
Yes, a control knob on top adjusts foam output and a separate adjustment changes the spray angle.
What connector size does it use?
It ships with a 1/4-inch quick connector for attaching to a pressure washer.