Tank capacity is usually the first number a buyer checks when comparing steam cleaners. A larger tank sounds like longer work, but the liter figure printed on a product page answers only part of the question. The product pages in PowerDe's cleaning equipment series are deliberately specific about some tank details and deliberately silent about others. Reading both halves correctly is what turns a specification into a realistic work cycle before you place an order.
What the product pages actually state about tanks
The cleaning equipment listing covers fixed, hand-pushed and driving-style machines, and each detail page publishes the clean water tank as part of a specification table. Three kinds of tank information appear consistently across those pages:
- Capacity in liters — the size of the clean water tank the machine carries or is built around.
- Tank material — the fixed machine's page specifies an 80 L tank made of SUS304 stainless steel, which matters for corrosion resistance and for cleaning the tank out.
- Water inlet type — the pages state how the tank is refilled. The fixed PowerDe HW02 steam cleaner lists a tap-water inlet with a 4-point internal-thread fitting (1/2 inch), and the hand-pushed steam cleaning machine lists the same tap-water connection.
Read together, the current listings give this picture:
| Model on the listing | Stated tank capacity | Stated water supply detail |
|---|---|---|
| HW02 fixed machine (220 V) | 80 L, SUS304 stainless steel | Tap water, 4-point internal-thread fitting (1/2 inch) |
| HMW3 hand-pushed machine (48 V battery) | 50 L clean water tank | Tap water, 4-point internal-thread fitting |
| HMW2 driving-style machine | 60 L | 4-point internal-thread fitting |
| PowerDe PWD02 steam cleaner | 60 L clean water tank | 4-point internal-thread fitting; dirty-water tank and vacuum mentioned |
| PWD01 driving-style machine | 80 L | 4-point internal-thread fitting; dirty-water tank mentioned |
The spread from 50 L to 80 L is not accidental. A fixed machine is designed to sit beside a water line, so its tank is a buffer rather than the limit of the job. A battery-powered hand-pushed or driving-style machine carries its own water, so the tank is the limit until someone walks back with a hose.
What the listings do not publish
The same pages stay silent on the numbers that convert liters into minutes of work. For the models above, the product pages do not state:
- water consumption per hour in dry-steam, wet-steam or hot-water mode;
- an estimated working time on a full tank;
- how many vehicles or square metres one fill covers;
- whether the published figure is total volume or usable volume above the pump line;
- on battery models, the battery capacity and run time — the HMW3 page, for example, gives 4.5 kW heating power and the 50 L tank, but no battery capacity or runtime figure.
That silence is not a gap you can close with arithmetic on your own. Consumption depends on the nozzle fitted, the mode selected and how the operator pulls the trigger, so any runtime quoted without a test is a guess. Treat the liter figure as the opening of a conversation with the manufacturer, not as the answer. The pages do list water-shortage protection among the machine's safety functions, which stops the pump from running dry — useful for the machine, but it tells you nothing about how long a tank lasts.
How to read tank capacity against your real work
Before asking whether 50, 60 or 80 liters is enough, define the job the tank has to support:
- A fixed point with a water line. If the machine stays at one bay with a tap nearby — the arrangement the HW02's tap-water inlet is built for — the tank matters less than the inlet fitting, the hose reach and the drainage route. The HW02 page describes vehicle exterior cleaning at gas stations and parking lots, where a fixed water connection is normally available.
- Mobile work across a yard or garage. On a hand-pushed unit or a driving-style machine, the practical limit is tank capacity plus the walking distance to the nearest tap plus drain access. Measure that distance before comparing liters; a 60 L tank with a tap at the far gate can mean fewer finished jobs per shift than a 50 L tank beside the bay.
- The mode you will actually run. Dry steam is the low-water mode; wet steam and hot-water washing draw more per minute. A machine used mostly in dry-steam mode stretches a small tank, while one run continuously in hot-water mode drains any tank quickly.
Questions that turn a spec sheet into a work cycle
When you request a quotation, ask for the tank information the listing leaves open, in writing:
- What is the measured water consumption per hour in each mode, with the standard nozzle?
- How many minutes, or how many vehicles, does one full tank support in the mode I will use?
- Is the published capacity total or usable, and how much water stays below the pump line?
- How long does a refill take, and what fitting does the inlet accept? (For the models above, the pages already answer the fitting question.)
- How is the tank drained and cleaned out, and is freeze protection provided for machines stored in unheated spaces?
- Which tank, pump and fitting spare parts are stocked, and with what lead time?
A supplier who has measured their own machines will answer these with numbers and offer a trial on your equipment. A supplier who answers with the brochure alone is asking you to buy the liter figure, not the work cycle.
Bottom line
The product listings tell you the tank size, the tank material where it matters, and how each tank is refilled — enough to shortlist a fixed or mobile machine for your site. They stop short of consumption and runtime figures on purpose, because those depend on mode, nozzle and operator. Bring your measured cleaning window and job count to the manufacturer's team, ask for the consumption numbers in writing, and test one machine on your own vehicles before scaling up. That sequence turns a liter figure into a work cycle you can plan a shift around.
