Clean Car USA Foam King Foam Cannon
Priced as of May 23, 2026
4.4(304 ratings)Buy on AmazonSaved to your guest loadout. Sign up to also save to your Cabinet (consumables) or Kit (tools you own).
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CarCareTruth's Analysis
Last reviewed May 26, 2026
TL;DR On a gas pressure washer the Foam King produces adequate-to-good foam — multiple Amazon verified-purchase reviewers call it "the most consistent foam" they have used. Dwell time unconfirmed — no community source documents a figure in seconds. Plastic body with a marketed stainless-steel 1/4" quick-connect per Clean Car USA's product infographic; long-term durability is not yet community-verified.
What it is and how it performs
A 1/4" quick-connect pressure-washer foam cannon with a plastic body, a marketed stainless-steel quick-connect, and a 32 oz wide-neck bottle. Adjustable foam-ratio knob and an adjustable spray pattern (wide fan / narrow stream). Listed range 500–4,200 PSI / 1.3–5.3 GPM. Across 304 Amazon ratings (4.4★) community evidence confirms adequate-to-good foam output on gas pressure washers; one reviewer notes the ratio knob turns "almost too easily" — a single ergonomic comment, not a documented pattern. Clean Car USA does not surface in Autogeek or Detailing World long-form threads.
Who should buy this — and who should skip it
Best for home detailers running a gas pressure washer at 2.0+ GPM who want a wide-neck bottle and adjustable spray at the mid-budget tier. Skip if you want multi-season durability data before buying — the review corpus skews first-season. Note: listed as an Amazon Add-On Item — requires a qualifying cart total to purchase on its own.
Safety and environmental impact
Hardware with no chemical exposure pathway — health score 9.5 (Minimal Risk). Plastic body (resin code unspecified) with stainless-steel and brass-toned metal fittings; no manufacturer take-back program documented.
Frequently asked questions
What pressure washer do I need for the Clean Car USA Foam King?▾
The Foam King is rated for pressure washers from 500–4,200 PSI and 1.3–5.3 GPM per the listing. Community reviews confirm adequate foam output on gas pressure washers; sub-2.0 GPM electric pressure washers fall inside the listed minimum but are not community-verified for thick coverage. One verified-purchase reviewer reports incompatibility with a Craftsman pressure washer — a single report without enough detail to call a documented compatibility pattern.
Is the Foam King's quick-connect actually stainless steel?▾
Clean Car USA's product infographic labels the 1/4" quick-connect as stainless steel. Whether the brass-toned valve body adjacent to the quick-connect is solid brass or brass-plated is not independently confirmed — Amazon's spec table only lists 'Exterior Finish: Plastic' for the body and does not specify a metal type for the internal valve.
Does the Foam King fit any pressure washer?▾
It uses a standard 1/4" quick-connect fitting compatible with the common US-market consumer machines (Ryobi, Sun Joe, Karcher) without an adapter. M22-threaded lances require a separate 1/4" quick-connect adapter (not included). The listing rates compatibility up to 4,200 PSI.
Does the Foam King leak or have known failure modes?▾
A failure-mode scan of 15 surfaces (8 top Amazon reviews plus 7 video reviews in the Rainforest cache) found zero distinct reviewers reporting a leak, thread strip, body crack, gasket failure, or seal failure on this cannon — that is below the 3-distinct-reviewer threshold required to identify a documented pattern. Long-term (3+ season) ownership data is limited; the review corpus skews first-season.
What size is the bottle?▾
32 oz wide-neck bottle per the manufacturer's product infographic (image labeled 'LARGE 32 OZ BOTTLE'). The wide-neck design is a marketed differentiator over category-typical narrow-neck cannons — it eases filling and reduces spillage.
Is this an Amazon Add-On Item?▾
Yes — the Rainforest cache flags this listing as an Amazon Add-On Item, which means it requires a qualifying cart total to purchase standalone on Amazon.
Is the Snubster attachment included?▾
No — the Snubster pressure-washer attachment is sold separately. A bundled kit variant (ASIN B0C4ZZ7D8T) includes the Snubster, a wash mitt, and a towel; this product page covers the standalone cannon.
From the manufacturer
Marketing copy from Clean Car USA, via Amazon. Not editorial.
- •POWERFUL SCRATCH FREE WASHING - Use Foam King's foam cannon with any foam cannon soap for pressure washer to create rich foam that lifts dirt and grime safely. Its advanced foaming tech ensures a swirl-free clean, safe for wax and sealant.
- •💦 WORKS WITH PRESSURE WASHER - Connects to your pressure washer using a 1/4" quick connector. Pressure: 500 - 4200 PSI, Flow: 1.3 - 5.3 GPM, Max. water temp: 140F. (⚠ Note: The Snubster attachment is NOT included but sold separately)
- •EXTRA-WIDE BOTTLE NECK: Our foam gun car foam sprayer makes filling easy and prevents bottle wear. The durable thread lock ensures an airtight seal for thick suds and powerful foaming action, outlasting traditional foam cannon designs.
- •💦 ADJUSTABLE FOAM & SPRAY: Our car wash foam cannon features an adjustable air intake and vertical spray pattern. Turn the dilution knob for perfect foam and adjust the lance from a wide fan for full coverage to a narrow stream for tough spots.
- •✅ FOAM KING GUARANTEE: Our passion is providing our customers with the best car cleaning products. We stand 100% behind our products. If you are not completely satisfied, reach out to us, and we will make it right! Let’s go CLEAN!
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Manufacturer videos
Manufacturer images
Manufacturer specifications
- Material
- Foam
- Brand
- Clean Car USA
- Exterior Finish
- Plastic
- Inlet Connection Size
- 0.25 Inches
- Inlet Connection Type
- Press
- Outlet Connection Type
- Quick Connector
- Maximum Operating Pressure
- 4200 Pound per Square Inch
- Number of Ports
- 2
- Outlet Connection Size
- 0.25 Inches
- Specification Met
- CSA
- Maximum Pressure
- 4200 Pound per Square Inch
- Connector Type
- Quick Connector
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Top Amazon review
↗External — Amazon's most-helpful review for context.
Great product.
This thing should not be this awesome for the price. It makes the most consistent foam I have ever seen and works as well as products twice as expensive. If you are trying to decide you should jump all over the product. Only, small, downside is the soap bottle could be a little bit bigger.