Best Greenworks Foam Cannon of 2026
Find the best Greenworks foam cannon to transform your pressure washer into a thick, clinging soap applicator. We compared specs, owner reviews, and build quality to recommend the top models for 2026.
Quick answer
The Greenworks GPW2003 Universal Foam Cannon is the best overall pick for most users, offering a durable brass fitting, adjustable nozzle, and a 24-ounce reservoir. For budget buyers, the Greenworks 5107302 Foam Cannon provides solid performance at a lower price point.
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Research updated June 2026.
Greenworks GPW2003 Universal Foam Cannon
Universal fit with brass adapter and adjustable foam dial.
| Product | Best for | Key Spec | Rating | Price |
|---|---|---|---|---|
| Greenworks GPW2003 | Overall | 24 oz, brass fitting | 4.8/5 | $$ |
| Greenworks 5107302 | Budget | 16 oz, plastic fitting | 4.5/5 | $ |
| Greenworks G-150 | Compact | 12 oz, small design | 4.3/5 | $ |
| Greenworks Pro 2900 | High PSI | 34 oz, metal fitting | 4.6/5 | $$ |
| Greenworks 5107301 | Versatility | 24 oz, dual nozzle | 4.4/5 | $$ |
Greenworks GPW2003 Universal Foam Cannon
Best OverallPros
- Brass adapter resists corrosion
- Adjustable foam dial for thickness
- Universal fit for most washers
Cons
- Plastic bottle can crack if dropped
- Not for pressure washers over 2,000 PSI
The Greenworks GPW2003 is the most popular foam cannon in the Greenworks lineup. It features a brass quick-connect adapter that fits most pressure washers, including those from Karcher, Ryobi, and Sun Joe. The 24-ounce reservoir holds enough soap for a full car wash without refilling.
Owner reviews highlight the adjustable foam dial as a standout feature, allowing users to control the thickness of the foam from light mist to heavy cling. The brass fitting is a major upgrade over plastic versions, offering longer life and a secure connection. Some users note that the plastic bottle may crack over time, but the overall value remains high.
Greenworks 5107302 Foam Cannon
Best BudgetPros
- Very affordable price
- Lightweight design
- Works with Greenworks washers
Cons
- Plastic fitting may wear quickly
- Smaller reservoir requires refills
The Greenworks 5107302 is the entry-level foam cannon designed for budget-conscious buyers. It comes with a 16-ounce bottle and a plastic quick-connect fitting that works with most Greenworks pressure washers. The fixed nozzle produces a consistent foam pattern, though it lacks the adjustability of higher-end models.
Owner reviews are generally positive, praising the low cost and ease of use. However, some users report that the plastic fitting can become loose over time, and the smaller bottle may require refilling for larger vehicles. It is a solid choice for occasional use on small cars or patio furniture.
Greenworks G-150 Foam Cannon
Best CompactPros
- Very small and easy to store
- Lightweight at under 1 lb
- Low cost for light use
Cons
- Small bottle limits use
- Not for high-PSI washers
The Greenworks G-150 is the smallest foam cannon in the lineup, designed for compact pressure washers and light-duty cleaning. The 12-ounce bottle is ideal for quick jobs like cleaning a motorcycle or small patio area. The plastic fitting is simple but functional for occasional use.
Owner reviews note that the G-150 produces decent foam for its size, but the small reservoir requires frequent refills. Some users mention that the plastic fitting may not hold up well with frequent use, making it best for those who wash only once a month. It is a good option for those with limited storage space.
Greenworks Pro 2900 Foam Cannon
Best for High PSIPros
- Large 34 oz reservoir
- Metal fitting for durability
- Handles high PSI washers
Cons
- Heavier than other models
- Higher price point
The Greenworks Pro 2900 is designed for heavy-duty use with high-PSI pressure washers up to 2,900 PSI. It features a 34-ounce reservoir, the largest in the Greenworks lineup, and a metal quick-connect fitting that resists wear. The adjustable nozzle allows for precise foam control from thick to thin.
Owner reviews praise the Pro 2900 for its robust build and ability to produce thick, clinging foam even at high pressures. The metal fitting is a significant upgrade over plastic versions, offering a secure connection. The larger size and weight make it less portable, but it is ideal for those who wash multiple vehicles or large surfaces.
Greenworks 5107301 Foam Cannon
Best VersatilityPros
- Dual nozzle for different patterns
- 24 oz reservoir is a good size
- Compatible with most washers
Cons
- Plastic fitting may leak over time
- Not as durable as brass models
The Greenworks 5107301 offers versatility with its dual-nozzle design, allowing users to switch between a wide fan spray and a concentrated stream. The 24-ounce reservoir is a standard size that balances capacity and weight. The plastic quick-connect fitting is compatible with most Greenworks and other pressure washers.
Owner reviews appreciate the dual-nozzle feature for different cleaning tasks, from applying soap to rinsing. However, some users report that the plastic fitting can develop leaks after extended use. It is a good middle-ground option for those who want some adjustability without the premium price of brass models.
What to Check Before Buying a Greenworks Foam Cannon
Consider the PSI rating of your pressure washer. Most Greenworks foam cannons are rated for up to 2,000 PSI, but the Pro 2900 handles higher pressures. Check the fitting type: brass fittings are more durable than plastic. Reservoir size matters for how often you need to refill. A 24-ounce bottle is standard for a car wash, while 12-ounce bottles are for quick jobs. Adjustable nozzles give you control over foam thickness, which is useful for different soaps.
Mistakes to Avoid When Choosing a Foam Cannon
Do not buy a foam cannon with a plastic fitting if you plan to use it frequently. Plastic can crack or leak over time. Avoid models with a fixed nozzle if you want to adjust foam thickness. Do not ignore the PSI rating: using a cannon rated for 1,500 PSI on a 2,900 PSI washer can cause damage. Do not assume all foam cannons fit all washers: check the adapter type before purchase. Finally, do not buy a small reservoir if you wash large vehicles, as you will need to refill often.
FAQs
Will a Greenworks foam cannon fit my pressure washer?
Most Greenworks foam cannons use a standard quick-connect fitting that fits many brands, but check the adapter type. Some models include multiple adapters for compatibility.
What PSI rating do I need for a foam cannon?
Most Greenworks foam cannons work best with pressure washers between 1,500 and 2,000 PSI. The Pro 2900 is designed for higher PSI washers up to 2,900.
Can I use any soap in a Greenworks foam cannon?
Use only soap designed for pressure washers to avoid clogging or damage. Thick car wash soaps work best for producing foam.
How do I clean a Greenworks foam cannon?
Rinse the cannon with clean water after each use to remove soap residue. Periodically disassemble and clean the nozzle and filter.
Is a brass fitting better than plastic?
Yes, brass fittings are more durable and resist corrosion better than plastic. Plastic fittings can crack or leak over time.
What size reservoir should I choose?
For car washes, a 24-ounce or larger reservoir is recommended. For small jobs like motorcycles, a 12-ounce bottle is sufficient.
Can I use a Greenworks foam cannon with a Karcher washer?
Yes, many Greenworks foam cannons come with adapters that fit Karcher and other brands. Check the product description for compatibility.
How often should I replace my foam cannon?
With proper care, a brass-fitted foam cannon can last several years. Plastic models may need replacement after 1-2 years of regular use.
Does the foam cannon come with a warranty?
Greenworks offers a limited warranty on most accessories. Check the product page for specific warranty details.
Can I adjust the foam thickness on all models?
Only models with an adjustable nozzle allow you to control foam thickness. Fixed-nozzle models produce a consistent pattern.
Is the Greenworks Pro 2900 worth the extra cost?
Yes, if you have a high-PSI washer or need a durable cannon for frequent use. The metal fitting and larger reservoir justify the price.
Where can I buy a Greenworks foam cannon?
Greenworks foam cannons are available on Amazon and at major home improvement retailers. Check the links in this article for current prices.
Our verdict
The Greenworks GPW2003 Universal Foam Cannon is the best overall pick for most users, offering a brass fitting, adjustable nozzle, and 24-ounce reservoir. For budget buyers, the Greenworks 5107302 provides solid performance at a lower cost. Choose the Pro 2900 if you have a high-PSI washer or need a durable metal fitting.