What is the tank made of, and how large is it?
Material comes first. On our PowerDe HW02 steam cleaner the 80 L tank is SUS304 stainless steel, and that choice matters for two reasons: the vessel sits in hot, wet conditions all day, and a steel tank that corrodes will pass rust and particles into the heater. Plastic tanks are lighter and cheaper, but they age differently under heat and they are harder to clean out once residue builds up on the inside wall.
Then size. A tank rated at 80 L keeps a fixed machine running through a long line of vehicles before anyone has to stop and refill. On a hand-pushed unit such as the PowerDe HMW3, the clean water tank is listed at 50 L, which suits a different working pattern. Ask your supplier for the usable volume, not the shell volume, and then match it to how long one shift runs before a break.
What water will the tank actually accept?
Ask whether the machine is designed for tap water, softened water, or distilled water. The HW02 takes tap water through a 4-point internal-tooth joint (1/2 inch), which is convenient on site but puts the burden of water quality on the buyer. In hard-water areas, mineral content is what deposits on heating elements and narrows steam passages over time. If your site water is hard, budget for filtration or softened supply before the machine arrives, and ask the manufacturer which inlet arrangement they recommend.
What happens when the tank runs dry?
This is the question that separates a serious machine from a cheap one. A heater with no water in it will fail quickly. The HW02 includes water-shortage protection alongside leakage, short-circuit, high-temperature, high-voltage and high-voltage-explosion protection, so the machine stops instead of burning out the heater. Confirm that low-level protection exists, and confirm what it actually does: does it cut the heater, cut the pump, or shut the whole unit down? The answer changes how the machine behaves during a real shift.
Can the tank be drained and cleaned?
Standing water is where sediment settles and where odour starts in a machine that also handles dirty interiors. Ask whether there is a drain point at the lowest position, whether the fill opening is wide enough to reach inside, and how the tank should be flushed after a day of use. Machines used for engine compartment steam cleaning or interior work pick up grease and dust that ends up in the rinse water, so a drain that actually empties the vessel keeps the next job clean.
How does the tank fit the space you have?
Tank capacity drives the footprint of the whole unit. The HW02 measures 1,200 mm long, 800 mm wide and 1,200 mm high including handles, and it works on a 220 V supply with 6 kW of heating power — dimensions suited to a fixed bay at a station or a parking facility. Where the work moves through a narrow garage, a mobile steam cleaning machine in the driving-style PWD01, PWD02 or HMW2 range carries a smaller tank precisely because it has to fit tighter spaces. A bigger tank is not automatically better; it is better only when your site can carry it.
Which accessories surround the tank?
Once the tank is settled, the accessory list falls into place: the nozzle type for the surface, hose length for the distance you work, and a vacuum function for interior jobs. Ask the supplier which items ship as standard and which are options, and check the length of the hose against the distance from your power and water point to the far side of a vehicle. Those few measurements decide whether operators keep moving or stop to reposition the machine.
A short checklist before you send the inquiry
- Tank volume and material, stated as usable volume
- Acceptable water quality, and what hard water does to the warranty
- What the low-water protection does when it trips
- Drain point, fill opening, and the recommended flushing routine
- Overall machine dimensions and supply voltage against your bay
- Standard accessories versus options, with hose length measured
Bring those answers to us and we can match you to a fixed or mobile unit from our PowerDe cleaning equipment range, or build a configuration around the water and space conditions at your site.
