Factory maintenance zones are easy to overlook and easy to flood with water. Service bays, oil-stained corridors, forklift washing corners and tool-storage areas are usually cleaned with a hose or a pressure washer, and nobody measures what that cleaning consumes. The water disappears down the drain carrying grease and coolant residue, and the only trace left behind is a quarterly utility bill. Evaluating this water use does not require a sustainability programme or new software. It requires a short period of honest measurement, a way to break the cleaning routine into comparable tasks, and a fair method of comparing one cleaning technology against another.
Why maintenance-zone water use deserves a second look
Water used in a maintenance zone does not stay clean. It picks up oil, grease, cutting fluid and metal fines on its way to the drain, which means every extra litre becomes wastewater that must pass an oil-water separator or leave the site under a discharge permit. The volume of water therefore sets the workload for the drainage system and the frequency of separator maintenance.
Water also hides inside labour and downtime. A wet floor cannot be walked on safely until it dries, so a long wash cycle extends the time a bay is out of service, and crews spend part of their shift squeegeeing standing water toward the drain. When you measure water per cleaning task, you are really measuring the cost of the entire routine: staff time, slip risk, wastewater handling and the utility bill together.
Step 1: Measure the current routine before changing anything
The first figure to establish is what the existing method consumes. If the tap or hydrant used for cleaning has no meter, fit an inexpensive inline meter, or measure the flow once: run a bucket and a stopwatch to find the litres per minute at the nozzle, then time active spray during each task from then on.
For two weeks, record every cleaning event in the zone: the task, the area or machine cleaned, how long the spray ran, the estimated water used, the crew and shift, and whether an oil spill triggered an unplanned wash. Two weeks is usually enough to see the pattern. In most factories, a small number of repeated tasks account for most of the water.
Step 2: Break the routine into comparable tasks
"Cleaning the maintenance area" is too vague to evaluate or to improve. Split it into units that can each be measured: floor degreasing under the service bay, machine exterior cleaning during planned maintenance, oil-spill response, forklift and pallet-jack washing, and parts cleaning at the workbench.
Assign the recorded water to each unit in a way that can be repeated: litres per square metre of floor, litres per machine cleaned, litres per spill. These per-task figures become the yardstick for every later comparison. Without them, a supplier's claim about water savings cannot be checked against your own site.
Step 3: Compare cleaning methods on water per task
Most maintenance zones have two practical options for heavy cleaning: pressure-washer washing with detergent, or high-temperature steam cleaning. A pressure washer uses less water than an open hose because the nozzle restricts flow, but water is still supplied continuously throughout the job, and most of it runs off carrying detergent. Steam systems work differently. They heat a finite charge of water in an insulated tank and deliver it as steam, so the cleaning work is not tied to a running supply.
PowerDe's fixed steam cleaning machine HW02 shows how little water such a system carries into a job. It holds an 80-litre stainless steel tank, generates steam at 160°C and 0.8 MPa from a 6 kW heater on a standard 220 V supply, and switches between dry steam for delicate areas and wet steam for heavier soil. The model is listed for vehicle and engine-compartment cleaning, and PowerDe names industrial maintenance among the application areas for its steam cleaning range. The same principle, high-temperature cleaning from a small, finite water charge instead of an open hose, is what makes low-water steam cleaning equipment worth testing on oily floors and machine exteriors.
Step 4: Count the hidden costs that water volume creates
Litres alone do not tell the whole story, so extend the comparison to the costs that follow the water:
- Wastewater handling: how much oil-laden runoff each method produces, and how often the separator needs servicing.
- Drying time: how long the floor or equipment stays wet enough to be a slip hazard or to delay the next task.
- Chemical use: detergents that must be dosed, stored, rinsed off and treated as effluent.
- Labour: crew hours spent washing, squeegeeing and waiting for surfaces to dry.
PowerDe positions high-temperature steam cleaning as a way to raise cleaning efficiency while cutting water use, labour intensity and reliance on chemical detergents. Whether that holds true in your building is exactly what the baseline test is designed to reveal. Run a steam trial on one task and compare the same per-task figures.
What to look for when choosing equipment
If the evaluation points toward steam, compare machines on the points that decide daily usability:
- Dry and wet steam switching, so the same machine can clean electrical cabinets and grease-covered surfaces.
- Steam temperature and pressure, which determine how quickly heat breaks down hardened grease.
- Tank capacity and water supply, including whether the unit accepts a tap-water inlet or needs manual filling.
- Power requirements, such as a standard 220 V supply versus three-phase power.
- Safety protections. PowerDe lists leakage, short-circuit, high-temperature, high-voltage and water-shortage protection on several models.
- Mobility: a fixed unit plumbed into a service bay, or a hand-pushed or driving-style machine for dispersed areas.
For factory machinery degreasing during planned shutdowns, a fixed unit installed in the maintenance bay is usually the simplest arrangement. Where cleaning points are spread across workshops and yards, an industrial maintenance steam cleaning machine that can be pushed or driven to the work keeps the water charge small and the task local.
A short evaluation checklist
- Meter or time the current method for two weeks.
- Split the records into per-task units: per square metre, per machine, per spill.
- Log wastewater volume, drying time and chemical use beside the litres.
- Trial a lower-water method on one task and measure it the same way.
- Review the results with whoever is responsible for water supply and discharge permits.
Water use in a factory maintenance zone stays invisible only as long as nobody measures it. A fortnight of simple records turns a vague impression into litres per task, and that number is the starting point for any honest comparison between methods. If the figures show that hose and pressure-washer washing dominate, a steam-based method deserves the same measurement on the same task. That is how a factory evaluates water use when cleaning its maintenance zones: not with a claim, but with a meter, a defined task and a fair test.
