The only wastewater underground tank of it's kind!
The GRAF One2Clean 9PE is a high-performance, single-tank domestic wastewater treatment system designed for properties with up to 9 residents. Utilising advanced SBR (Sequencing Batch Reactor) lifting technology, this system achieves up to 99% pollutant removal efficiency, making it one of the most effective solutions on the market for domestic off-mains sewage treatment.
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
The system is CE Certified and fully compliant with EN12566-3, offering excellent effluent quality that meets and exceeds regulatory standards. It’s also nutrient neutrality-friendly, ideal for sensitive discharge areas. With low energy consumption (just 46 kWh per person annually) and reduced sludge production, the One2Clean provides an efficient and cost-effective long-term investment for homeowners.
No specialist wiring is needed on-site, and the unit is suitable for dry ground installations using granular base and backfill. An integrated sample chamber and user-friendly controls ensure easy maintenance and monitoring.
FREE commissioning is available with every system, carried out by an accredited GRAF UK partner.
Enjoy a 15-year warranty on the tank shell and 2-year warranty on the internal technology when installed and serviced by a GRAF-certified technician.
Key Benefits:
Strong, injection-moulded construction (15-year tank warranty)
2-year technology warranty
Quiet operation
Built-in, self-cleaning sampling point
Plug-and-play installation – no onsite wiring required
Ultra-low power usage – just 46 kWh per person, per year
Stable for groundwater levels up to the tank’s midline
Compact control panel for indoor or optional outdoor kiosk
Specifications:
| Specification |
Value |
| Model |
G50004 |
| Population Capacity |
Up to 9 People |
| Dimensions (L x W x H) |
2390 x 2190 x 2390 mm |
| Inlet/Outlet Diameter |
DN100 / 110 |
| Weight (Empty) |
220 kg |
| Inlet Invert |
630–830 mm |
| Outlet Invert |
630–830 mm |
| Air Compressor Power |
58 Watts |
| Compressor Noise |
36 dBA |
| BOD |
7 mg/l |
| Suspended Solids |
14 mg/l |
| Ammonium (NH4-N) |
0.5 mg/l |
Options & Accessories:
Outlet type: Gravity or pumped
Invert depth extensions: Available with standard, 310mm, or trimmable risers
Lid options: Pedestrian duty (standard) or vehicle duty up to 3.5t
Maxi Dome cover: Required for vehicle-duty installation
Outdoor controller kiosk: Available for installations more than 20m from the building
Need help selecting the right system? Call our expert team on 01388 537 050 or email us with your requirements – we’re happy to help.
