The Rag Company Ultra H2O Foam Cannon
The Rag Company Ultra H2O Foam Cannon
Built from the ground up as part of the Ultra H2O system, not a rebadge of an existing cannon. What separates it is repeatability: every adjustment runs on positive tactile detents, so the soap ratio, fan rotation and spray width you settled on last wash are the ones you get this wash. Smooth friction dials drift; detents don't.
Inside, the flow path is full stainless steel and the whole unit is rebuildable — O-rings, filters and internal components are replaceable rather than the cannon being thrown out when something wears.
Key points
- Detent click adjusters on soap delivery, fan rotation and spray width — precise, repeatable settings.
- Stainless steel internals and impact-resistant body.
- Weighted pick-up tube — holds soap draw at steep angles and as the bottle empties.
- Rebuildable and serviceable — replaceable O-rings, filters and internals.
- 1 litre wide-mouth HDPE bottle with a ¼-turn lid — quick to fill, quick to rinse out.
- Both 1.1 and 1.25 orifices supplied — tune the cannon to your machine.
Specifications
- Bottle capacity: 1 litre
- Orifices supplied: 1.1 and 1.25
- Working pressure: min 1,100 psi – max 5,000 psi
- Flow rate: min 1.4 gpm – max 5.3 gpm (approx. 5.3 – 20 L/min)
- Maximum water temperature: 140°F (60°C)
Will it suit your machine?
Check the minimums, not the maximums. The Rag Company's guidance is that the cannon wants at least around 4.5–5.7 litres per minute to foam properly, and at least 1,100 psi behind it.
That's not marketing — it's how a foam cannon works. Solution is drawn through a venturi and sheared into air by the water stream. Below that threshold there isn't enough energy in the stream to do the shearing, which is why very small garden-hose-style washers produce runny foam no matter how good the shampoo is. Most domestic and prosumer electric washers clear both minimums comfortably.
A note on foam
Thick foam is a means, not the end. What matters on a pre-wash is dwell — foam that clings long enough for the surfactants to lift traffic film before anything touches the paint. Repeatable dilution control is what lets you dial that in for the shampoo you're actually running.
In the box
- Ultra H2O Foam Cannon with 1 litre bottle
- 1.1 and 1.25 orifices
- Spare fitting O-ring
The rest of the Ultra H2O range
- Ultra H2O Spray Gun
- Ultra H2O Spray Wand
- Ultra H2O 40° Spray Nozzles — 3.0, 4.0 and 5.0
Also written as Ultra H20 Foam Cannon.