Guide · Foam cannons
Foam cannon connections: 1/4 in quick-connect or a brand fitting
Buy the foam cannon version whose connector matches the end of your wand: a 1/4 in quick-connect for most wands, or a brand version for Kärcher and others.
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Picks that fit
- MJJC Foam Cannon S V3.0 with 1/4 in quick connector adapter (QRFLSV3)Check price on Amazon
- MJJC Foam Cannon PRO V3.0 with 1/4 in quick connector adapter (QRFLPROV3)Check price on Amazon
- SIMPSON 80271 high pressure foam cannon, 1 L, 1/4 in QC plug, 1,600‑4,000 PSICheck price on Amazon
Short answer
Buy the foam cannon version whose connector matches the end of your wand. For most wands that is a 1/4 in quick-connect; for Kärcher and some other brands it is a brand-specific version. The connector is the choice that decides fit. We cover the hardware only, not soaps or mixing.
Picks that fitAll picks and how to choose
Start at the end of your wand
A foam cannon takes the place of a nozzle, so it connects where your nozzles do. On most gun-and-wand setups that is a 1/4 in quick-connect. DEWALT's DXPA31SW wand has a 1/4 in quick-connect outlet for tips,[1] and RYOBI's RY1419MT wand has a 1/4 in quick-connect nozzle coupler.[2] Look at the 1/4 in quick-connect standard if you are unsure what yours is.
Kärcher is different. Kärcher states that a nozzle cannot be connected directly to its VersaGRIP or Standard trigger gun; a spray wand goes on the gun first and the nozzle goes on the wand.[3] Kärcher's bayonet gun kit uses a Kärcher-specific quick-connect for the hose and a Kärcher bayonet connection for spray wands.[4] Those are proprietary interfaces, not M22 or 1/4 in quick-connect. See the Kärcher bayonet page and Kärcher bayonet guns and hose kits.
Connector versions: MJJC
MJJC sells its Foam Cannon PRO V3.0 in separate connector versions: a 1/4 in quick connector version and versions for Kärcher K, AVA, Nilfisk/Gerni/Stihl, Bosch/Black+Decker and Lavor/Parkside machines.[5] The visible listings do not state an M22 bore, orifice size or pressure range, so the connector is what you pick by.
MJJC's Foam Cannon S V3.0 is a separate family. MJJC sells it with a 1/4 in quick connector (SKU QRFLSV3), with a 1.25 mm orifice installed and a 1.1 mm orifice in the package.[6] The PRO V3.0 holds up to 1,200 ml and has an extra 28 mm thread and a wider bottle opening, per MJJC.[5] Facts for one family do not carry over to the other.
Plug variants: MTM Hydro PF22.2
MTM Hydro's PF22.2 kit includes a 1/4 in M22 adaptor and a 1/4 in plated-steel quick-connect plug.[7] MTM notes that some residential washers need its separately sold Low Profile QC plug (item 24.5006).[7] So even within "1/4 in quick-connect", the plug can matter. If a cannon does not seat in your wand's coupler, check the plug before forcing it.
| Cannon | Connector options the maker lists |
|---|---|
| MJJC PRO V3.0 | 1/4 in QC; Kärcher K; AVA; Nilfisk/Gerni/Stihl; Bosch/Black+Decker; Lavor/Parkside |
| MJJC S V3.0 (QRFLSV3) | 1/4 in quick connector |
| MTM Hydro PF22.2 | 1/4 in M22 adaptor and 1/4 in QC plug in the kit; Low Profile QC plug 24.5006 sold separately |
Foam cannon or garden-hose foamer
These are two different tools. MTM Hydro sells low-pressure garden hose foamers separately from high-pressure foam cannons for pressure washers.[8] MTM lists its PF22.2 cannon at 1,100 to 5,000 PSI and its GHF1 garden hose foamer at 145 PSI.[8] If a listing says "foam gun", check whether it attaches to a garden hose or to your pressure washer's wand.
The orifice matters too
The connector decides whether the cannon attaches. The orifice inside it decides how it loads your machine. Some electric machines' makers set a minimum, so read foam cannon orifices: 1.1 vs 1.25 mm before you use the spare orifice in the box.
Where MJJC sells
MJJC's Where to Buy page directs shoppers to a country distributor list and does not mention Amazon or AliExpress.[9] We could not tie any AliExpress store to MJJC from MJJC's own site, so we name none. MJJC's FAQ says its own store ships to the United States, the UK, the European Union and Turkey; Canada is not on that list.[10] MJJC also tells buyers who purchased from a third-party site or store to contact that seller first.[10]
Approved foam cannons
Picks that fit4 products
All four are the 1/4 in quick-connect versions, for wands that end in a 1/4 in quick-connect; for the Westinghouse PWFC, read the connector notes on Westinghouse's page against your wand end before ordering.
More on choosing
None fits a Kärcher bayonet wand; for Kärcher K machines, look for MJJC's Kärcher version instead. The MJJC listings include a soap sample; we cover the hardware only. On Amazon, check that Ships from / Sold by is Amazon.com or the brand.
1/4 in quick connector cannon with two orifices
MJJC Foam Cannon S V3.0 with 1/4 in quick connector adapter (QRFLSV3)
1/4 in quick connector version of MJJC's larger cannon
MJJC Foam Cannon PRO V3.0 with 1/4 in quick connector adapter (QRFLPROV3)
Next
Questions
Will a foam cannon fit my electric pressure washer?
If your wand ends in a 1/4 in quick-connect, a 1/4 in quick-connect version attaches. If your machine uses a brand fitting such as Kärcher's, buy the version for that brand; MJJC sells separate connector versions for Kärcher K, AVA, Nilfisk/Gerni/Stihl, Bosch/Black+Decker and Lavor/Parkside.[5]
What is the difference between a foam cannon and a foam gun?
Check what it connects to. MTM Hydro sells low-pressure garden hose foamers separately from high-pressure foam cannons; its PF22.2 cannon is rated 1,100 to 5,000 PSI and its GHF1 garden hose foamer 145 PSI.[8]
Do I need an adapter for a foam cannon on a Kärcher?
Not if you buy a Kärcher version: MJJC sells one for Kärcher K machines. Kärcher says nozzles go on the wand, not directly on its VersaGRIP or Standard gun, so check whether the cannon mounts on the gun or the wand.[5][3]
Does MJJC sell on Amazon or AliExpress?
MJJC's Where to Buy page points to a country distributor list and does not mention Amazon or AliExpress. We could not tie any AliExpress store to MJJC from its own site.[9]
Can I order from MJJC directly in Canada?
MJJC's FAQ lists the United States, the UK, the European Union and Turkey as destinations for its own store; Canada is not on that list.[10]