MTM Hydro PF22.2 Foam Cannon Review

What MTM Hydro actually publish

There is a real datasheet for this cannon. It is not on any page that sells it. It is on pages 38 and 39 of MTM Hydro’s High Pressure Technology catalog for 2026, a 15MB PDF on the Italian parent company’s website, where the product is called the PF22.2 Professional Foam Lance with Adjustable Air Intake and Fan rather than a foam cannon. Here is everything on it.

The catalog also lists five patents against it — Italian 0000282836 and 0001426116, 112015004184, and US 10,173,230 B2 and 10,562,049 B2 — and names nine inlet options, from a plain G 1/4 male thread through M22 to stainless BPS45 and KPS45 plugs and a plastic bayonet. None of that detail survives into the US retail channel, where the product is one SKU with a 1/4 inch quick-connect plug.

What the listings say instead

Now the same product as sold in the United States. These are the five listings we read in full on 14 October 2026, including the one run by MTM Hydro’s own exclusive US supplier.

Two things stand out before we get to who is right. The first is that the distributor closest to the manufacturer publishes the least: mtmhydroparts.com, which describes itself as the exclusive supplier of MTM Hydro products, lists the orifices, the fittings and the bottle and gives no pressure or flow rating anywhere on the page. The second is that Detail King contradicts itself inside a single page, with 4,000 PSI in the specification block and 5,000 PSI in the FAQ below it.

Where the 5,000 PSI figure comes from

It comes from the product’s own manual, and it is printed there under the wrong part number. The US kit is part 14.5013, and its manual is two pages: instructions and an exploded parts diagram. At the very bottom of page two there is a four-column technical chart. The chart is headed “14.5001 PF22 Professional Foam Cannon” and its single row reads: part number 14.5001, 1,100–5,000 PSI, 1.8–5.3 GPM, 140°, 1/4 inch inlet, 1.25mm nozzle.

That row is the ancestor of every number in the table above. 14.5001 is not the PF22.2; it is the earlier plain PF22, which MTM Hydro list separately in the same catalog as the Professional Foam Lance with Adjustable Air Intake, rated at 16 MPa with 18 MPa permissible and a rated flow of 20 l/min. In US units: 2,320 PSI, 2,600 PSI and 5.2 GPM. The 5.3 GPM that every US listing quotes as the PF22.2’s maximum is, to within rounding, the older cannon’s rated flow.

There is one more coincidence worth seeing rather than guessing about. The same MTM Hydro catalog does contain foam equipment rated near 5,000 PSI: the FH35, FHS35 and FHF35 foam heads, at 31 MPa rated and 35 MPa permissible, which is 4,500 and 5,075 PSI, flowing 45 l/min. They are not cannons. They are heads that require a metering pump or a chemical injector installed upstream, they take no bottle, and the nozzle is not even included. Nobody is selling you one of those for $95.

The number that decides whether it works at all

For almost everyone reading this, the maximum is academic and the minimum is the whole question. The manual answers it, in the one passage that nobody quotes:

• With the 1.25mm / 3.5 orifice installed — the one fitted in the body when you open the box — “a minimum of 1.8 GPM and a minimum of 1,100 PSI is required for the product to operate correctly.”
• With the 1.1mm / 3.0 orifice installed — the spare that comes in the box — the minimum drops to 1.4 GPM, with the same 1,100 PSI.

That single distinction explains the disagreement in the listings entirely. The sellers quoting 1.4 GPM and the sellers quoting 1.8 GPM are both reading the same document; they are just quoting different rows of it, and neither says which orifice the number belongs to. If you have a 1.5 GPM electric pressure washer — which is most consumer electric machines — the cannon as shipped is below its own minimum, and the fix is a two minute orifice swap, not a return.

The manual spells the swap out: replace position 8, the 1.25mm special nozzle, with position 23, the 1.1mm orifice, part 36.5000, “to convert to low pressure/volume.” Shop Pressure Washer Parts add the other half of this, which is that the two orifices in the box do not cover the advertised range in either direction: a 2,000 PSI, 3.5 GPM machine wants a 5.0 orifice that is not included, and running an undersized orifice makes the unloader cycle the machine on and off and produces thin, watery foam.

If your foam is bad, check this order

• Flow first. Below 1.8 GPM with the fitted orifice, it cannot work properly no matter what soap you use.
• Orifice second. Between 1.4 and 1.8 GPM, swap to the 1.1mm that came in the box.
• Filter third. The manual is emphatic that an unrinsed filter clogs, and that this can happen after the first use.
• Soap last. It is the thing everybody changes first and the least likely cause.

The ceiling, and what to do if you are over it

If your pressure washer makes more than 3,200 PSI — a gas contractor machine, most commonly — you are above the figure the manufacturer calls permissible, even though the listing you bought from said 5,000. This is not a dramatic failure mode. A foam cannon is a brass body, an orifice, seals and a mesh filter; over-pressure wears the orifice and stresses the seals rather than bursting anything. But orifice wear is exactly what changes the mix ratio over time, which is the thing you paid $95 to avoid.

The answer is the unloader or the regulator on the machine, not a different cannon. Dial the pressure down for the foam pass and put it back up for the rinse. You want dwell and coverage from a foam pass, not force. Detail King’s instructions say the same thing for a different reason: set the regulator low on first installation and bring it up.

One liter, or 32 ounces

Every US listing says the bottle is 32 oz. MTM Hydro’s catalog says 1 lt, which is 33.8 oz, and the parts list inside the US manual calls item 9 a “1 Liter Bottle.” The exclusive supplier manages both on one page, describing a “one-liter” bottle in the copy and listing a 32 oz bottle in the specification.

Two ounces is not worth an argument, and we are recording it for the same reason we recorded everything else: it is one more figure where the US paperwork and the manufacturer disagree. If you are measuring soap by the bottle’s own calibration marks, use the marks rather than either number.

Fittings, and the residential pressure washer problem

The kit includes a 1/4 inch M22 adaptor and a 1/4 inch quick-connect plated steel plug, plus a 1/4 inch by 9 inch chemical draw tube. That covers most machines. The gap the supplier flags on its own page is worth reading before you buy: MTM Hydro’s standard 1/4 inch plugs are industrial, and several residential pressure washers need a low-profile quick-connect plug, item 24.5006, which is sold separately. Shop Pressure Washer Parts name Generac, Greenworks, Ryobi and AR Blue Clean among the machines that may not accept the standard plug.

The other compatibility note is absolute rather than solvable. A cannon will not work on a pressure washer with a flow-sensing unloader, because the unloader cycles the pump against the restriction. The symptom is identical to an undersized orifice, which is why people chase the orifice for weeks. If your machine has a flow-sensing unloader, no foam cannon fixes it.

What you give up for $95

The warranty, in writing. The manual that ships with the US kit is published by Veloci Performance Products, Inc., the distributor behind mtmhydroparts.com, and MTM Hydro is not named anywhere in it. It states that “Veloci makes no warranty whatsoever with respect to the product, including any warranty of merchantability or warranty of fitness for a particular purpose.” Some resellers advertise a 90 day limited warranty of their own; the document in the box disclaims everything.

• The filter clogs, and the manual says so in capitals. Rinse and flush with clean water after every use. Two spare stainless filters, part 36.0226, come in the box precisely because this happens.
• A Proposition 65 warning for DINP and DEHP is published on the supplier’s page, and the product is declared not for potable water systems.
• It needs a pressure washer. There is no garden hose version of this product. MTM Hydro make a separate garden hose foamer, the GHF1, rated at 0.9 MPa or 130 PSI, and its catalog entry says in plain terms: do not assemble on a pressure washer.
• We have not tested it. Everything above is a published document, cited below, and where a figure does not exist we have said so rather than estimated it.

Why this was so hard to find out

Because MTM Hydro’s own English-language website does not load. On 14 October 2026, both mtmhydro.com and www.mtmhydro.com answer with a TLS certificate issued for an unrelated hostname, weblp05.si-tek.net, so every browser and every tool refuses the connection outright. The brand that four of this site’s search queries ask for by name has no reachable brand site, which is why the US channel has spent years copying one chart from each other with nothing to check it against.

The real data is two clicks away on the Italian parent’s site, in a catalog PDF large enough that most tools give up on it. That is the whole mechanism. There is no conspiracy here, just a specification that nobody could reach.

The PF22.3, which nobody sells you

On the same catalog page, directly beneath the PF22.2, MTM Hydro list a PF22.3: same description, same five patents, same ratings of 20 MPa and 11.5 l/min, same 1 liter tank, part numbers 1021015100 to 1021015900, and exactly 55 grams heavier in every one of the nine inlet variants. The catalog does not say what the extra 55 grams buys. We could not find it offered anywhere in the US channel, and we are not going to speculate about a product we cannot buy — only note that if you have seen the name and wondered, it is real and it is in the maker’s current catalog.

Who should buy it

Buy it if your pressure washer clears 1,100 PSI and 1.8 GPM, sits at or below 3,200 PSI, and you expect to still own this cannon in five years. The case for the PF22.2 was always the body and the orifice rather than a performance figure, and that case gets stronger now that the performance figures exist: a single-cast nickel-plated brass body with a calibrated 1.25mm nozzle is plumbing hardware, and plumbing hardware holds its dimensions while plated pot metal does not.

Do not buy it if you are below 1.4 GPM even with the small orifice fitted, if your machine has a flow-sensing unloader, or if you do not own a pressure washer at all — in which case what you want is a foam gun for a garden hose, and the reason the two are not interchangeable is in foam cannon versus foam gun. If you want it weighed against the obvious alternative at a lower price, we have the PF22.2 against Adam’s Premium and the MJJC against the MTM, and the whole field is ranked in the best foam cannon.

One last note on the name. The Amazon listing is titled “MTM Hydro PF22 Wide Mouth Snow Foam Cannon” rather than PF22.2, and the manual inside is headed “14.5013 PF22 Professional Foam Cannon.” The wide mouth bottle is what identifies the current kit, and 14.5013 is the part number the exclusive US supplier uses for the PF22.2. If you are comparing listings, match on the wide mouth bottle rather than on the decimal.