Buyers compare steam cleaners by power and temperature, then discover on delivery day that the machine cannot be fed. The tank is the part people read; the supply behind it is the part that decides whether a shift runs. Water-supply requirements cover four separate questions — what the tank holds, how it is filled, what quality the water must be, and where the used water goes — and a buyer should have a written answer to each before the order is placed. For any industrial steam cleaner, these four answers belong in the same document as the machine specification.
1. Capacity: the number on the page is not the number in your shift
The Fixed Steam Cleaning Machine PowerDe HW02 page lists an 80 L SUS304 tank. The Hand Pushed HMW3 page lists a 50 L clean-water tank. Those figures say what one fill carries; they say nothing about how long a fill lasts on your surfaces, and that second number is what the schedule needs. Steam units use far less water per hour than a hose, which is the reason they are chosen — but the interval between fills is still a production interruption, and nobody can plan around an interruption nobody has measured.
Ask the supplier for the consumption figure and the expected continuous running time per fill for the exact model, in writing. If those figures are not published on the product page, say so in the enquiry and require them in the quotation. Then compare them to your longest planned run without a break.
2. Filling: the fitting, the height and the walk
Both pages list a tap-water inlet with a 4-point internal-tooth fitting (1/2 inch on the HW02). That one detail decides whether you need an adapter, a hose run, or a plumbed filling point placed where the machine parks. Walk the route before you sign: from the machine's working position to the nearest tap, with the machine loaded, through the doors it has to pass. On a fixed unit this is a plumbing decision made once; on a mobile unit it is a decision repeated every shift, and a badly placed tap quietly costs the crew several minutes per fill.
3. Water quality: the requirement nobody puts in the order
| Question | What to get in writing from the supplier |
| Inlet type and fitting | Thread and size, whether a hose can be connected directly, maximum inlet pressure if stated. |
| Permitted water quality | Whether tap water is acceptable at your local hardness, and any treatment the supplier requires or recommends. |
| Warranty position on scale | Which failures count as scale-related and what evidence (water test, maintenance record) is required. |
| Descaling interval and method | Approved descaling agent, frequency, and whether doing it yourself affects the warranty. |
| Consumption per hour | Figure for the exact model and mode (dry steam, wet steam, hot water), so fills per shift can be planned. |
The product pages state that these machines take tap water, but they do not state a hardness limit. That gap matters more than it looks: scale is the most common way a steam machine quietly stops performing, and the warranty consequence of untreated water is decided by the supplier, not by the brochure. Have your local water hardness tested, put the result in the enquiry, and ask what treatment the supplier expects if the number is high.
4. Where the used water goes
Water leaving the machine comes off the cleaned surface carrying whatever was on it — road film at a forecourt, cutting oil in a machine shop, grease in a kitchen. So a water-supply assessment is unfinished until it also states how runoff is collected and where it is allowed to go. A graded floor with a drain is a different situation from an indoor parking level with none, and a machine shop needs to know whether oily runoff may enter the general drain at all. Put this to the site engineer and to the supplier in the same enquiry; if the site cannot meet the requirement, that is a configuration question and may change which model you buy.
Test the supply on site before the machine arrives
Three checks take an hour and remove most surprises: measure the hardness at the point the machine will actually be filled, confirm the socket and water point are within the machine's working reach, and count how far the crew must walk to refill. Where the site falls short — no fitting that matches, hardness too high, no drain where the work happens — those are the points to raise with the supplier's engineers. That is also the stage at which steam cleaning equipment testing on your own surfaces should be arranged, because the trial is run with your water and your runoff conditions, not the demonstration conditions.
Send the supplier your tank-to-shift calculation, your hardness result, a photo of the filling point and the drainage constraint, and ask them to confirm in writing that the quoted model — or a customized steam cleaning equipment configuration — can be fed, run and drained at your site as drawn.
