The fleet of diesel vehicles with particulate filters is ageing: Euro 5 and Euro 6 cars have piled up the kilometres, and with kilometres comes ash, which no regeneration removes. Every clogged DPF puts the customer in front of a choice between an expensive replacement and a cleaning. Whoever offers cleaning locally captures work that many workshops today send away or solve by replacing the filter.
Opening a regeneration centre is not complicated, but it means thinking ahead about things that do not come with the machine: utilities, waste, procedures and customers.
Two service models (which can be combined)
- Full service to the end customer. The vehicle comes into the workshop: diagnosis, removal, cleaning, refitting, ECU reset. Higher margin per job, because it includes labour and diagnosis.
- Trade cleaning centre. Local workshops remove the filter and bring or ship it to you; you return it clean with the report. Lower unit price, but higher and steadier volumes.
Most successful centres do both: direct service brings margin, trade work keeps the machine busy.
Space and utilities
| What you need | Guidance |
|---|---|
| Space | From a corner of the workshop for a compact car machine to a dedicated area, with lifting equipment, for heavy-vehicle filters |
| Electricity | Three-phase 380 V supply (smaller machines also single-phase 220 V); check that your contracted power can handle water heating, which ranges from 7.5 to 15 kW |
| Compressed air | A compressor delivering at least 10 bar for washing and drying cycles |
| Water | A filling point for the tank, 100 to 250 litres depending on the model |
| Drain | None to the sewer: wash water is waste and must be collected |
Waste: the item many underestimate
Wash water and filtered residue contain soot, ash and metal oxides: they are special waste and must never be discharged into the sewer. In practice you need:
- a temporary storage area with suitable containers;
- an authorised company for collection and disposal;
- classification of the waste with the correct EWC code, usually through a laboratory analysis;
- a waste register and transport forms, which in Italy are being digitised through the RENTRI system.
It pays to talk to an environmental consultant before buying the machine and to build the disposal cost into the service price from day one. Good water filtration in the machine, with cartridge and bag filters, extends water life and reduces the volumes to dispose of.
Equipment beyond the machine
- Adapters to connect the filters you will work on: the set should match the most common vehicles in your area.
- Diagnostic tool to read filter data, start regenerations and reset adaptations after cleaning.
- Endoscope to inspect the channels and reject cracked or melted monoliths before washing.
- Back-pressure measurement, built into the machine or on a bench, to document before and after.
- Protective equipment: gloves, goggles and mask, because soot and ash are dusts you should not breathe.
The workflow
- Intake: vehicle, mileage, fault codes, filter part number, photos on arrival.
- Inspection and initial measurement: monolith and back-pressure check. A damaged filter is reported to the customer straight away, before any work.
- Washing with the programme suited to the filter type.
- Complete drying: a damp filter skews the measurement and must not be refitted.
- Final measurement and before/after report for the customer.
- Refitting and resetting the ECU adaptations, if you also work on the vehicle.
- Advice on upstream causes: if the filter clogged because of a fault, report it. It is also extra work for the workshop.
The before/after report deserves a note: for the customer it is proof that the job was done and worked. It is your best sales tool, especially with the workshops that send you their filters.
Finding your first customers
- Local workshops without a machine: offer collection and delivery, reliable turnaround and the report. They often become the most loyal customers.
- Fleets, rental companies, hauliers and farms: large filters, repeat jobs and a direct interest in cutting downtime and costs.
- End customers: a page on your website about clogged-DPF symptoms and an up-to-date Google Business profile capture people searching for DPF cleaning nearby.
- Clear pricing: the comparison with the cost of a new filter is your strongest argument.
Checklist before you start
- How many filters do you see in a month today, and how many could you collect from nearby workshops?
- Cars and vans only, or also heavy and agricultural vehicles?
- Are electrical supply, compressed air and space adequate?
- Do you already have an agreement with a disposal company and an idea of the cost per filter?
- Who trains you at the start and who supports you if the machine stops?
For the numbers, meaning margins and payback, see the dedicated article on how much a DPF washing centre earns. For choosing the equipment, the 7 criteria for choosing the machine.
Frequently asked questions
Do you need authorisation to wash DPFs?
In Italy, removing and refitting the filter on the vehicle requires vehicle repair registration (mechatronics section). Handling the wash water requires special waste procedures: temporary storage, an authorised company, registers. Check your case with the Chamber of Commerce and an environmental consultant.
How much space does a DPF washing machine take?
It depends on the filters: compact car machines fit in a corner of the workshop, while heavy-vehicle machines need a dedicated area and lifting equipment for the largest filters.