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GRAF One2Clean Sewage Treatment Plant 5PE | G50000

£2,030.00
£2,436.00 (inc VAT)
£2,030.00 (exc VAT)

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Product Description

This product is delivered directly from the supplier, lead times vary.

 

The GRAF One2Clean is a highly efficient, single-tank wastewater treatment system designed for domestic properties requiring reliable off-mains drainage. Utilising advanced SBR (Sequencing Batch Reactor) technology, the system achieves up to 99% pollutant removal, delivering exceptional effluent quality while maintaining low running costs and minimal maintenance requirements.

Fully CE certified and compliant with EN 12566-3, the One2Clean is engineered to meet current environmental standards and is future-proofed for evolving wastewater treatment regulations. Its innovative single-chamber design eliminates the need for pumps, electrical components, and moving parts within the wastewater, improving reliability and reducing long-term servicing requirements. With ultra-low energy consumption, low sludge production, and a plug-and-play installation process, the One2Clean offers a cost-effective and environmentally responsible solution for domestic sewage treatment.


Product Features:

  • Advanced SBR technology with up to 99% pollutant removal
  • Single-tank, single-chamber treatment system
  • CE Certified and compliant with EN 12566-3
  • Ultra-low energy consumption of just 46 kWh per person per year
  • Low sewage sludge production
  • No pumps within the wastewater
  • No electrical components in the wastewater
  • No mechanical moving parts in the wastewater
  • Plug-and-play installation with no on-site wiring required
  • Built-in self-cleaning sampling chamber
  • Quiet and efficient operation
  • Groundwater stable up to the tank's midline
  • Suitable for granular backfill installations
  • Future-proof design for evolving environmental regulations

 

Key Benefits:

  • Lower running and maintenance costs
  • Excellent treated water quality
  • Reliable operation with fewer components
  • Reduced energy consumption
  • Minimal servicing requirements
  • Simple installation process
  • Environmentally friendly wastewater treatment
  • Suitable for domestic off-mains drainage applications


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

 

Graf One2Clean 5PE Drawing

Graf One2Clean Installation Guide

Graf UK Brochure

Ebara Optima Pump Specification

Graf One2Clean PIA Certificate 

Graf One2Clean IPS Pumped Option Information

Graf One2Clean Log Book

 

SKU: TANONE2GRA001

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CUSTOMER REVIEWS

Rated 4.8/5 by Direct Drainage Customers

Based on over 600 verified reviews

VERIFIED REVIEW

Very helpful from the start to the finish

Items were despatched quickly and arrived the next day. Would recommend.

Title

North Hayne Farm Cottages | 26 June 2026

VERIFIED REVIEW

Cheapest price I could find for the pump

Cheapest price I could find for the pump and delivery the next day what more could you want.

Title

Sam Jukes | 5 November 2025

VERIFIED REVIEW

Great service!

I ordered a septic tank it was delivered within a week and the delivery driver left it in the exact right place and time. Would definitely use this company again, thanks so much.

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Eve Harland | December 2025

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FAQs

From choosing the right treatment plant to installation, maintenance and UK regulations, we've answered some of the most common questions to help you find the right solution for your property.

What is the difference between a septic tank and a sewage treatment plant?

A septic tank separates solids from wastewater before allowing the liquid to drain into a suitable drainage field. A sewage treatment plant goes a step further, using biological processes to treat wastewater to a higher standard before discharge. Sewage treatment plants are often the preferred choice where improved treatment performance is required.

What size sewage treatment plant do I need?

The correct size depends on the number of people your property is designed to accommodate, the expected wastewater flow and the type of property. Sewage treatment plants are commonly rated by Population Equivalent (PE). It's important to select a system with sufficient capacity to handle your property's requirements. Our team can help you choose a suitable system.

Do sewage treatment plants need electricity?

Most sewage treatment plants require electricity to operate components such as air blowers, pumps or control systems. However, power consumption varies depending on the manufacturer and model. Some systems use low-energy technology to help minimise running costs. Always check the individual product specifications before purchasing.

How often does a sewage treatment plant need emptying?

Sewage treatment plants require periodic desludging to remove accumulated solids. This is commonly carried out at least once a year, although the frequency depends on the system, usage and manufacturer's recommendations. Regular servicing and maintenance are also essential to maintain performance and help prevent costly breakdowns.

Do you supply replacement parts for sewage treatment plants?

Yes! At Direct Drainage, we supply a wide range of sewage treatment plant spare parts, including air blowers, diaphragms, filters and other essential components. Whether you're carrying out routine maintenance or replacing a faulty part, our team can help you identify a suitable replacement for your system.

Do you stock all tanks and sewage treatment systems?

We do not stock tanks and treatment systems as standard. These are supplied directly from the manufacturer. The lead times of these systems will vary. If you need an accurate delivery date, please contact us on 01388 537050.

Are your prices inclusive of VAT?

It is important to note that all prices listed on our website exclude VAT. VAT will be calculated at checkout.