Before choosing a snow foam lance or replacement gun, we identify the exact connection being changed. A washer can use different fittings at the machine, hose and lance, and matching the brand name is not enough. An adapter such as the Better Detailing M22 to 3/8 inch quick release adapter may solve the connection, but we also check the thread, insert size, sealing method and pressure rating before recommending it.
What pressure washer fitting do I need?
It depends on the exact machine model and which join you are connecting: machine to hose, hose to gun, or gun to lance. For a snow foam lance it is the gun to lance join, usually a bayonet, a quick release, a screw thread or the maker's own clip.
Match that fitting, or bridge it with the right adapter. The model number matters more than the brand name, so have it to hand before you order anything.
Which connection points matter on a pressure washer?
Three separate joins, and they are often different from each other on the same machine. Check each one you plan to change.
- Machine to hose: where the high pressure hose leaves the unit.
- Hose to trigger gun: the join at the handle, often an M22 screw thread.
- Gun to lance or accessory: where a snow foam lance, wand or brush attaches.
A snow foam lance almost always attaches at point three, so that is the fitting you need to identify.
What are the pressure washer connector types?
Pressure washer hose connector types and gun to lance fittings come in four main kinds: bayonet, quick release, screw thread and the maker's own clip. Many hoses and guns use an M22 screw thread, while lances and accessories more often use a bayonet or a quick release.
- Bayonet: push and twist to lock. Common on many domestic machines.
- Quick release: a sprung collar you pull back. Widely used on enthusiast and professional machines, in more than one size, with 1/4 inch and 3/8 inch the usual two.
- Screw thread: threads directly into the gun or hose, typical of some trade machines. M22 is a 22mm thread.
- The maker's own clip: several manufacturers use their own click-fit design that nothing else matches without an adapter.
| Connector type | How it locks | Where you find it |
|---|---|---|
| Bayonet | Push and twist | Gun to lance on many domestic machines |
| Quick release (1/4 or 3/8 inch) | Sprung collar pulled back | Guns, lances and hoses on enthusiast and professional machines |
| Screw thread (such as M22) | Threads in | Hose to gun, hose to machine, some trade lances |
| Maker's own clip | Click fit | Brand-specific guns and accessories |
Does the same brand mean the same fitting?
No. Manufacturers change fittings across model generations and between their domestic and professional ranges, so a fitting that suits one model often will not suit the next one up.
That is why the lance adapters below name the machines and connection types they suit, and why the model number matters more than the brand name.
How do you choose a snow foam lance?
Choose a snow foam lance by the fitting on your trigger gun first, then check that your machine has the flow to run it. A pressure washer lance attaches where the lance or wand normally goes, so it has to match that outlet exactly; a hose-fed foam gun runs from a garden hose instead, so the only fitting it needs is the hose connector.
Lances are sold with a fitting for one machine family, and one brand can need several. AutoBead's Magnum Snow Foam Lance, for example, comes with separate fittings for Karcher K Series and Karcher HDS machines, for Nilfisk straight lug and rounded lug guns, for Bosch long and Bosch short connections, for a Kranzle male 22mm thread and for a 1/4 inch quick release. That is why we ask for the model number rather than the brand before we suggest a lance or adapter.
- Read the gun outlet: bayonet, quick release, screw thread or the maker's own clip, as in the table above.
- Match or adapt: buy the lance with that fitting, or fit one of the lance adapters below to a lance that has a replaceable top.
- Check the flow: the lance and its orifice must suit the machine's litres per minute, as covered in the next answer.
Does flow rate matter for a snow foam lance?
Yes. A snow foam lance needs enough flow to draw and aerate the mixture properly, so fit is only half of it.
An unsuitable lance orifice can affect chemical draw and foam quality. We recommend checking the lance's supported flow range, orifice options, dilution setting and cleanliness before adding more concentrate. A connection adapter does not correct a flow mismatch. Our guide to the best snow foam covers the foam side.
Which adapters and guns do we stock?
Our range includes model-specific lance adapters, quick releases and short trigger guns. We would check the exact connector before choosing from these options, particularly when a hose or gun has already been changed from the original.
Snow foam lance adapters
Many aftermarket snow foam lances come with a 1/4 inch quick release or another machine's fitting screwed into the top. These Better Detailing metal adapters replace that fitting so the lance connects to your machine:
Snow Foam Lance Adapter for Bosch AQT (Short Type) and Portland Husky
A metal screw-in adapter for selected Bosch AQT machines with the Short Type connection and compatible Portland Husky machines. This is the short fitting; it is different from the longer Bosch AQT connection.
Snow Foam Lance Adapter for Nilfisk, Gerni, KEW, Alto, Stihl and Husqvarna
A metal adapter for the Nilfisk-style connection used on selected models from those six brands.
Snow Foam Lance Adapter for Karcher Professional HD and HDS (New Type)
A metal adapter for newer Karcher Professional HD cold-water and HDS hot-water machines. It does not suit the older HD and HDS connection or domestic Karcher K2 to K7 machines.
Quick release adapters
Better Detailing M22 Male to 3/8 inch Female Quick Release Brass Adapter
Solid brass, converts an M22 male thread into a 3/8 inch female quick release coupling for guns, hoses and foam lances with a 3/8 inch plug.
Stainless Steel Quick Release Male Foam Lance Adapter
Stainless steel, so it will not rust, with a 1/4 inch BSP thread and an 11.6mm plug.
Better Detailing Karcher Stubby Trigger Gun Adapter
Converts compatible Karcher pressure washers for use with a stubby trigger gun. Check your machine's fitting before you order.
Trigger guns
DTLR 2.0 Pro Trigger Stubby Gun
Shorter than a standard factory gun for closer control around the car, with stainless steel quick release couplings for fast, secure attachment of lances, foam cannons and nozzles.
£99.95In stockAn M22 male screw thread inlet for the hose and a 1/4 inch female quick release for accessories, rated to 225 bar and 60 degrees C.
£29.95In stock
How do you fit a snow foam lance adapter?
Where the lance has a replaceable threaded adapter, fit the matching part using its specified sealing method. We recommend checking the instructions before removing anything: some joints seal on an O-ring or washer, while others require a suitable thread sealant.
- Isolate the machine: switch off, disconnect the power and water and release any pressure left in the system.
- Remove the old fitting: unscrew the quick release or machine adapter from the top of the lance.
- Check the thread: make sure the thread and seals are clean and undamaged.
- Seal it: use only the sealing method specified for that connection. Do not add PTFE tape to an O-ring or washer-sealed joint as a substitute for the correct seal.
- Fit the adapter: screw it in and tighten it securely without overtightening.
- Test for leaks: connect the lance, run the machine and check the join before normal use.
Are pressure washer adapters a good idea?
Yes, within limits. Adapters solve most mismatches, and there is nothing wrong with using one.
Keep two things in mind: every extra join is a potential leak point, and adapters do not change flow rate. An adapter will make a lance attach, but it will not make an underpowered machine foam well.
What should you check before ordering?
Four things, so the part fits first time:
- The exact machine make and model number.
- Which of the three joins you are trying to connect.
- The machine's flow rate in litres per minute, if it is listed.
- Whether the original gun is still fitted, or has already been replaced.
Common questions
Will a snow foam lance fit any pressure washer?
Only with the right fitting. Most aftermarket lances take a swappable fitting at the top, so the lance itself can suit many machines once the matching adapter is screwed in.
What is an M22 fitting?
M22 identifies a nominal 22mm thread, but that alone does not establish compatibility. Pressure-washer M22 connections can have different internal insert sizes, commonly 14mm or 15mm. We check the thread, insert, male or female end and sealing arrangement before selecting an adapter.
Why does my snow foam come out thin and watery?
Check the dilution, lance adjustment, chemical pickup tube, filter and orifice before changing products. A mismatch with the washer's flow can also affect foam. We would work through those checks first; adding more concentrate is not always the answer.
Which pressure washer suits car detailing?
One with enough flow for a foam lance and quick release fittings, so lances and guns swap easily. Our guide to the best pressure washer for car detailing compares the machines we recommend.
If in doubt, ask first
Fittings are the area where guessing costs the most time. Send the TDHQ team your machine model and a photograph of the connector and we will tell you what matches before you order. You can also browse every trigger gun and the full Better Detailing range.
Last updated 20 October 2026.
