Wash and Decontamination
MJJC vs MTM Foam Cannon
The two cannons enthusiasts argue about, within $10 of each other. One publishes its bottle size, the other its brass body - and a pressure and flow rating that is on no listing selling it.
By Sawyer V. · Last verified 2026-09-10
We have not tested any of this. Everything below is compiled from published manufacturer specifications, and the arithmetic is printed so you can check it. This page carries affiliate links: if you buy through one we earn a commission at no extra cost to you, and it does not change the order of the picks. Full disclosure.
Top pick
| # | Pick | Best for | Score | Price |
|---|---|---|---|---|
| 1 | MTM Hydro PF22.2 Foam Cannon MTM Hydro | The cannon people stop upgrading from | 6.3/10 | $94.49 - view on Amazon |
| 2 | MJJC Foam Cannon PRO V3.0 MJJC | A bigger bottle and a quick connect | 3.8/10 | $118.00 - view on Amazon |
Prices last verified November 9, 2026. They move constantly; the figure on Amazon when you click is the real one.
Side by side
| MTM PF22.2 | MJJC PRO V3.0 | |
|---|---|---|
| Price | $94.99 (Adam's Polishes) | $104.95 (McKee's 37) |
| Body | Italian nickel-plated brass, single cast | Stainless steel material, per MJJC; parts not specified |
| Orifice | Italian calibrated | Not published |
| Bottle | 1 liter / 33.8 oz | Up to 1,200 ml, translucent |
| Fittings | Included | 1/4 in quick connector included |
| Other | Five patents listed | Anti-leakage cap |
| Maximum pressure | 3,200 PSI permissible, 2,900 rated | Not published |
| Flow rating | 3 GPM rated; 1.8 GPM minimum as shipped | Not published |
What each maker chose to publish
MTM’s listing reads like plumbing hardware: an Italian nickel-plated brass body cast in one piece, a calibrated orifice, and fittings in the box. MJJC’s reads like a product update: a translucent bottle of up to 1,200ml, an anti-leakage cap, stainless steel material, and what they call a shaving cream foam guarantee, provided you use the right amount of a quality shampoo and a suitable pressure washer.
The pressure washer matters more
Both are pressure-washer cannons, and neither listing publishes the pressure or flow it is built for, so neither listing lets you match it to your machine. For the MTM you can match it anyway, because the figures exist elsewhere: 1,100 PSI and 1.8 GPM minimum as shipped, 3,200 PSI maximum, which is the subject of our PF22.2 review. For the MJJC there is nothing to match against. Is a foam cannon worth it covers the cannon question, and is a pressure washer worth it the machine behind it.
Who should buy which
- A brass body and a calibrated orifice: MTM PF22.2, $94.99.
- A bigger bottle and a quick connector in the box: MJJC PRO V3.0, $104.95.
Every pick, with the working
Each entry lists the specifications the maker publishes, the axis scores those specifications produce, and what you give up. Rows that read “Not published” are not omissions on our side: they are figures the maker will not commit to in writing, and they cost the product points on the transparency axis.
Our pickThe cannon people stop upgrading from
MTM Hydro PF22.2 Foam Cannon
MTM Hydro
$94.99 for an Italian nickel-plated brass body with a calibrated orifice, sold through Adam's alongside their own cannon. MTM Hydro do publish a full datasheet for it, in their own 2026 catalog rather than on any listing that sells it: 20 MPa rated, 22 MPa permissible, 11.5 l/min, one liter. In US units that is 2,900 PSI rated and 3,200 PSI maximum, which is well under the 5,000 PSI the US listings advertise.
- Body
- Italian nickel-plated brass, single cast
- Maximum pressure
- 3,200 PSI permissible / 2,900 PSI rated (22 MPa / 20 MPa)
- Flow rating
- 3 US gal/min rated (11.5 l/min)
- Minimum to operate
- 1,100 PSI, and 1.8 GPM with the 1.25mm orifice fitted or 1.4 GPM with the 1.1mm
- Canister capacity
- One liter / 33.8 oz
- Orifice
- 1.25mm fitted, 1.1mm in the box
- Maximum temperature
- 140 °F / 60 °C
- Warranty
- None. The US distributor's manual disclaims all warranty expressly
What it does well
- Nickel-plated brass single-cast body rather than the usual plated pot metal
- Calibrated orifice, which is the part that decides foam quality and the part cheap cannons vary on
- The only cannon in this category with a real manufacturer datasheet: rated and permissible pressure, rated flow, tank volume, nozzle diameter and five patent numbers
Who it is not for
- $94.99 is roughly double a competent cannon
- Needs a pressure washer; it will do nothing on a garden hose
- Every US listing advertises a 5,000 PSI ceiling that MTM Hydro's own catalog does not support, and the US manual disclaims all warranty in writing
How this score was calculated
- Protection claimdropped
- Nothing in this category is bought on how long it lasts, so the axis is dropped and the other weights are re-normalized.
- Published maximum pressure7.3/10, weight 22%
- 3200 PSI, scored on a band running from 1000 to 4000. Published by MTM Hydro.
- Cost per ouncedropped
- This is not a consumable, so cost per ounce says nothing useful and the axis is dropped.
- Price against the ceiling0.0/10, weight 14%
- A listed $94.99 against the $90 one upgrade in this category realistically tops out at. A list price captured on the compile date, not a live price and not what you will pay.
- Written commitmentdropped
- MTM Hydro publishes no warranty term on this product's own page, so the axis is dropped. On a tool that is worth noticing, and it costs the product points on transparency instead.
- Spec transparency10.0/10, weight 18%
- 8 of the 8 specifications we went looking for are published by MTM Hydro. Every blank row below is something the maker will not put in writing, and it costs the product points here.
List price $94.99 per Adam's Polishes' own store, captured on the compile date below. Not a live price and not what you will pay — the button is where the real number is.
Specifications from MTM Hydro High Pressure Technology catalog 2026, pp. 38-39 (PDF), compiled September 8, 2026.
2A bigger bottle and a quick connect
MJJC Foam Cannon PRO V3.0
MJJC
$104.95 at McKee's 37 for MJJC's PRO V3.0 with a 1/4 inch quick connector, a translucent bottle of up to 1,200ml, an anti-leakage cap and what MJJC call stainless steel material. The listing publishes no pressure or flow rating.
- Bottle
- Up to 1,200 ml, translucent
- Fitting
- 1/4 in quick connector included
- Material
- Stainless steel, per MJJC; parts not specified
- Cap
- Anti-leakage
- Maximum pressure
- Not published
- Flow rating
- Not published
What it does well
- Bottle up to 1,200ml, published
- Quick connector included
- Anti-leakage cap
Who it is not for
- No maximum pressure or flow published
- $104.95, $9.96 more than the MTM
- Which parts are stainless is not specified
How this score was calculated
- Protection claimdropped
- Nothing in this category is bought on how long it lasts, so the axis is dropped and the other weights are re-normalized.
- Capabilitydropped
- MJJC does not publish a figure for published maximum pressure on this product, so the axis is dropped and the remaining weights are re-normalized.
- Cost per ouncedropped
- This is not a consumable, so cost per ounce says nothing useful and the axis is dropped.
- Price against the ceiling0.0/10, weight 14%
- A listed $104.95 against the $90 one upgrade in this category realistically tops out at. A list price captured on the compile date, not a live price and not what you will pay.
- Written commitmentdropped
- MJJC publishes no warranty term on this product's own page, so the axis is dropped. On a tool that is worth noticing, and it costs the product points on transparency instead.
- Spec transparency6.7/10, weight 18%
- 4 of the 6 specifications we went looking for are published by MJJC. Every blank row below is something the maker will not put in writing, and it costs the product points here.
List price $104.95 per McKee's 37, with quick connector, captured on the compile date below. Not a live price and not what you will pay — the button is where the real number is.
Specifications from McKee's 37's MJJC PRO V3.0 listing, compiled September 8, 2026.
Prices last verified November 9, 2026. They move constantly; the figure on Amazon when you click is the real one.
Questions people actually ask
+Is MJJC or MTM better?
+Does the MJJC foam cannon come with a quick connect?
+Do I need a pressure washer for either?
Where these figures came from
- MTM Hydro PF22.2 listing at Adam's Polishes — retrieved 2026-09-10
- McKee's 37's MJJC PRO V3.0 listing — retrieved 2026-09-10
Every figure on this page is a published manufacturer or authorized-retailer claim, not a measurement we made. How we research explains exactly what we did and did not do.