The only wastewater underground tank of it's kind!
The GRAF One2Clean is a highly efficient, single-tank wastewater treatment system that uses advanced SBR (Sequencing Batch Reactor) technology to achieve up to 99% pollutant removal. Engineered to meet EN12566-3 standards and fully CE certified, this compact unit delivers exceptional effluent quality and is future-proofed for evolving regulatory requirements.
What makes the One2Clean unique?
- Only one tank with just one chamber required.
- Less energy consumption and less water.
- No mechanical elements in the wastewater.
- No pumps in the wastewater.
- No electrical components in the wastewater.
- Incredibly low volume of sewage sludge.
PLEASE CALL 01388 537 050 FOR AN ACCURATE LEAD TIME
With energy consumption as low as 46 kWh per person annually and minimal sludge production, the One2Clean is an eco-conscious and cost-effective solution for domestic off-mains wastewater treatment. It includes a self-cleaning sampling chamber, and thanks to its plug-and-play design, no on-site electrical wiring is required.
The system is compatible with granular backfill on dry installations and is groundwater stable up to the tank's midline. GRAF UK offers free commissioning through an accredited service provider, with an optional 3-year technology warranty when commissioning and servicing are handled by approved partners.
Key Benefits:
Durable Injection-Moulded Tank – Backed by a 15-year shell warranty
Low Maintenance Technology – 1-year warranty on system components
Quiet, Efficient Operation
Clear Water Lifter Design for effective discharge
Integrated Sample Point – Automatically rinses clean
Compact Control Unit – Indoor installation or optional outdoor cabinet
Quick Installation – No electrical connections needed on site
Low Running Costs – Just 46 kWh per person, per year
Technical Specifications:
| Feature |
Details |
| Model |
G50000 |
| Population Equivalent |
1 – 5 persons |
| Dimensions (L x W x H) |
2280 x 1755 x 1880 mm |
| Nominal Inlet/Outlet |
DN100/110 |
| Empty Weight |
150 kg |
| Inlet/Outlet Invert (Standard) |
630–830 mm |
| Power Consumption |
58W air compressor |
| Noise Level |
36 dBA |
| Effluent Quality |
BOD: 7 mg/l, SS: 14 mg/l, NH4-N: 0.5 mg/l |
| Warranty |
Tank: 15 Years / Technology: 1 Year (extendable to 3 years) |
| Product Code |
G50000 |
Optional Upgrades & Accessories:
Inlet & Outlet Configuration Options – Gravity or pumped outlets available. Invert levels adjustable using risers.
| Setup |
Pedestrian Duty Invert |
Vehicle Duty Invert |
| Standard Gravity Outlet |
630–830 mm |
1000–1250 mm |
| 310mm Riser – Gravity |
875–1075 mm |
1195–1420 mm |
| Trimmable Riser – Gravity |
1130–1400 mm |
N/A |
| Integral Pump Outlet |
950–1150 mm |
1000–1250 mm |
| Pump + 310mm Riser |
1195–1395 mm |
1195–1420 mm |
Cover Options – Comes with a pedestrian-grade lid as standard. A vehicle-rated lid (up to 3.5 tonnes) is also available and requires the Maxi Dome extension for proper load distribution.
Outdoor Controller Cabinet – For installations where the control panel cannot be sited indoors (e.g., >20m distance from the tank), a lockable kiosk is available.
Need Help?
If you’re unsure which configuration is best for your site, contact our team at 01388 537050. We’re happy to assist with selecting the right setup for your wastewater management needs.
