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Graf One2Clean Plus Sewage Treatment Plant


The One2Clean Plus sewage treatment plant from Graf will treat the water, so that it is clean enough to be discharged into a water course (depending on how frequently it is being used and the manufacturer’s guidelines). However, One2Clean Plus sewage treatment plants do ...Read More

£3,120.00 Incl. VAT
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The One2Clean Plus sewage treatment plant from Graf will treat the water, so that it is clean enough to be discharged into a water course (depending on how frequently it is being used and the manufacturer’s guidelines). However, One2Clean Plus sewage treatment plants do require a power source and requires emptying approximately every year.

The water discharged from the One2Clean Plus packaged treatment plant must meet the relevant British Standard which is BS EN 12566 for small sewage treatment plants and BS 6297:2007 for drainage fields.

Graf One2Clean Plus Sewage Treatment Plant Process

  • Untreated waste enters the One2Clean tank via the inlet on the side.
  • Wastewater then falls directly into the biological zone where the treatment takes place, allowing micro-organisms to start the breakdown process.
  • Compressed air is used initially for aeration through the diffuser, intermittent to achieve the best treatment performance.
  • Aeration is then stopped allowing the activated waste to sink to the bottom.
  • Compressed air is sent through the One2Clean tank once again, extracting the cleaned water near the surface.
  • This water passes through a sampling point before leaving the plant, where samples can be taken to confirm the quality of effluent.
  • The above process occurs twice per day, each lasting 12 hours.
  • The sludge which builds up at the bottom of the tank must also be emptied in line with the manufacturer’s instructions
  • Numerous companiescan dispose of the waste, these must be a registered waste carrier

Features & Benefits

  • One tank with just one chamber
  • Less energy consumption
  • No mechanical elements in the wastewater
  • No pumps in the wastewater
  • No electrical components in the wastewater
  • Incredibly low volume of sewage sludge
  • Odourless, clear treated water for extraction
  • State-of-the-art manufacturing for maximum stability
  • 100% watertight and corrosion-resistant
  • Can be installed in groundwater
  • Simple maintenance via an integrated, self-cleaning sampling container
  • More advanced control panel than the standard One2Clean
  • Control panel allows additional plug in retro fitting of add on systems


Product Type Sewage Treatment Plant Weight Class B125
Capacity 1-6 Person
13-24 Person
7-12 Person
Population 5 Person
7 Person
9 Person
10 Person
14 Person
18 Person
Domestic Or Commercial Commercial
Gravity Or Pumped Gravity Install Type Standard

Questions & Answers


What is the difference in the weight class


The difference between the weight class is that A15 is suitable for pedestrians to walk over with a weight rating of 1.5 tonnes. However, B125 is suitable for smaller vehicles with weight durability of 12.5 tonnes.



Can the power be switched off when the residence is unoccupied?


You can, however it is not recommended on a regular basis. When empty or turned off, the bacteria will die off and will need to be restarted once turned back on.


What size electric supply does this need


You would need a Single phase - 220-240v.


Does this ship as kit of parts rather than fully assembled (good if it is a kit) and does it have the ability to accommodate reduced flow in the case use in a holiday home complex.


This gets delivered fully assembled ready to go into the ground. It can fluctuate the capacity of effluent as needed


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Graf One2Clean Plus Sewage Treatment Plant

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