A product list of accessories answers the wrong question. It tells you what a nozzle is called, not whether that nozzle reaches the joint you actually clean, stays locked at the pressure you run, and survives the shift. Before you order spare lances, brushes or extension wands for a mobile steam cleaning machine, write the questions below and demand written answers. The answers, not the pictures, decide whether the accessory earns its place on the machine.
What physical work will the accessory do?
Start with the surface and the soil, not the part name. A mobile machine gets used on vehicle panels, wheel arches, engine bays, floors, steps and wall joints, and each of those needs a different delivery of heat. Write one line per task: what the surface is made of, what is stuck to it, how far the operator must reach, and whether the area can get wet. That line is the specification. An accessory that cannot be tied to a line on that list should not be ordered, because it will sit in a cupboard and be blamed on the machine later.
Ask the supplier to describe the task each accessory is meant for in words, then compare those words with your list. Where they do not match, ask what would have to change on your side for it to match, and who pays for that change.
Which machine and which mode does it fit?
Mobile units are sold as variants, and the accessory fit follows the variant. Some configurations run dry steam, wet steam and hot water, and the choice of mode changes what a nozzle or brush is doing: dry steam carries heat with little moisture, wet steam adds water to soften deposits, hot water flushes loosened soil away. An accessory that works well in one mode can flood or clog in another. State the mode you intend to use for each task and ask which accessories are offered for that mode on your specific machine.
Ask, in writing, which machine models and which mode each accessory is listed for. If the answer is a model name you do not own, ask whether the connection and the pressure range are the same. Battery and non-battery versions of the same model also differ in what the operator can carry and how long the job runs, so confirm that the accessory does not add reach or weight the operator cannot manage on your layout.
What is it made of, and at what temperature?
Heat is what does the work, and heat is what destroys parts. Ask for the material of the lance body, the seals, the brush bristles and the handle, and ask what temperature each of those is rated for. A bristle that softens after a few minutes of continuous steam will leave residue on the surface you are trying to clean. A seal that is fine for short bursts may fail on a long bay.
Ask whether the bristles or pads are safe on the materials you have: painted panels, rubber trim, gaskets, anodised metal, plastic housings. Ask for the highest rated temperature of the accessory and compare it with what the machine delivers at the tip, not what the brochure states at the boiler. Those two numbers are not the same thing.
How does it attach, and how does it stay attached?
Ask what the connection type is, whether a tool is required, and whether the joint is rated for the working pressure of the machine. Ask whether the fitting has a locking mechanism, and what stops it pulling out of the operator hand under reaction force at the lance. Ask for the torque or the fitting standard if one applies.
Ask whether the trigger or valve stays open on its own. An accessory that must be held open by hand slows the job and increases the chance of steam sitting on one spot too long. Ask whether the trigger valve can be locked off for transport and for storage, and whether the machine's own trigger control is still used with it.
What does it do to steam delivery?
Every restriction between the machine and the surface changes what arrives. Ask what the orifice size is, whether the accessory reduces flow, and how much length or bend it adds. A long extension wand with a bend cools the steam before it reaches the soil and condenses water inside the tube, so the operator compensates by moving closer, which is how paint trim and seals get damaged.
Ask the supplier to state what the operator should expect to feel different at the lance when this accessory is fitted, and whether any change in machine mode or setting is needed to compensate. That question exposes whether the accessory was designed for the machine or merely sold alongside it.
Which parts wear out, and what do they cost and take to get?
Ask which items on this accessory are consumables, what their expected service interval is as a frequency (checked per shift, replaced when a symptom appears) rather than a number, and what the symptom of a worn part looks like. Nozzle wear shows up as a change in spray shape and in how long the surface takes to respond, so operators need to know what to look for.
Ask for the spare part list with the accessory, the unit price, and the lead time for each item. Then ask whether seals and fittings are stocked as a kit or sold one by one, because a machine stops over one seal you cannot order. A machine that is down for a week waiting for a small brass part is a bad purchase, not a bad operator.
How does it store, and how does it stay clean?
Ask whether the accessory has a place on the machine, or whether it lives on a hook, in a crate or on the floor. Loose lances and hoses get run over, kinked and contaminated, and a dirty nozzle sprays what was on the previous surface onto the next one. Ask whether the hose and wand can be hung without kinking, and whether the accessory can be rinsed and dried after use without being disassembled with special tools.
Ask for a pre-shift check for the accessory: which fittings to inspect, which to look for wear on, and what to do if a check fails. Write that check into the same sheet as the machine's own checks, so one person owns both.
What water does it need, and how does the machine protect itself?
Accessories inherit the water problem of the machine they attach to. Ask what inlet connection the machine expects and what inlet filtration is provided, because scale carried into a small orifice changes the spray long before anyone notices. The PowerDe HW02 steam cleaner page, for example, lists a tap-water inlet with a 1/2 inch four-point internal-tooth joint and an 80 L SUS304 tank; those are installation and maintenance facts, not a promise that any surface can be cleaned with any accessory.
Ask which protection functions the machine provides, so you know what a shutdown means when it happens in the middle of a job with an accessory fitted. The same product page names leakage, short-circuit, high-temperature, high-voltage, water-shortage and high-voltage-explosion protection by name. A protection trip is a fault to be investigated and recorded, not something to reset repeatedly while finishing a bay.
Can you try it on your own worst surface?
Ask the supplier to run the accessory on a sample of your worst soil, or to let you run it with your own operator on your own site. During the trial, fix and record what you vary: the mode, the distance from the nozzle to the surface, the speed of the pass, the number of passes and the dwell time. Then judge the result against your own baseline: how long the task took before, how long it takes now, how much water was used, and how long before the bay or room can be used again.
A trial without your own operator tells you what the accessory can do in experienced hands that are not yours. Fix the parameters that worked, put them on one page, and use that page for training and for the next purchase.
What must not be sprayed with it?
Before any accessory is approved, the person responsible for the equipment should sign a list of what must not be sprayed: electrical connectors and harnesses, instruments and control panels, bearings and guide surfaces that carry lubricant, seals and bonded joints, open vents and ducts, and any area where water cannot drain. The list protects the asset, not the machine. If the list cannot be produced for an area, that area stays on dry cleaning.
What happens when the standard list does not fit?
A standard set of accessories is written for a typical job. Where the set does not answer your site, ask about customized steam cleaning equipment and send the facts instead of a model number: the surface list, photographs of the worst soil taken from a fixed angle, the timing of the current method, the power available at the position, and where the water goes.
Write the final answers into one controlled page: task, machine and mode, accessory and its fixed parameters, the signed no-spray list, the pre-shift check, and the spare parts with lead times. Keep one line per job as evidence. When you need to talk it through, use the contact PowerDe page with that page attached.
