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GRAF OneAdvanced Klaro Sewage Treatment Plant 40PE | G50030

Over 17,000+ Happy Customers

GRAF OneAdvanced Klaro Sewage Treatment Plant 40PE | G50030

£7,611.00
£9,133.20 (inc VAT)
£7,611.00 (exc VAT)

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Product Description

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

 

The GRAF Klaro E Professional 40PE Sewage Treatment Plant is a high-capacity wastewater treatment system designed for larger domestic properties, commercial premises and multi-occupancy developments serving up to 40 people. Utilising advanced Sequential Batch Reactor (SBR) technology with innovative air-lift pumping, the system delivers excellent treatment performance while maintaining low running costs, minimal maintenance requirements and outstanding effluent quality.

The system is built around two robust 10,000-litre underground tanks, providing a total treatment capacity of 20,000 litres. Manufactured using durable injection-moulded polyethylene, the tanks are designed for long-term performance and groundwater stability. Unlike traditional sewage treatment plants, the Klaro E Professional features no moving mechanical parts inside the tanks, reducing maintenance requirements and improving reliability. Wastewater is transferred through the treatment process using three highly efficient air-lift pumps powered by a low-maintenance compressor housed within an internal control cabinet. The intelligent control system optimises treatment performance while maintaining energy-efficient operation. An integrated holiday mode automatically adjusts system activity during periods of reduced occupancy, helping to lower energy consumption without compromising treatment quality.


Key Features & Benefits:

  • Suitable for properties and developments serving up to 40 people
  • Advanced SBR (Sequential Batch Reactor) wastewater treatment technology
  • Two 10,000-litre underground tanks providing 20,000 litres total capacity
  • No moving parts inside the treatment chambers
  • Three air-lift pumps for dependable wastewater transfer
  • Low-maintenance compressor-driven operation
  • Excellent treated effluent quality
  • Quiet and energy-efficient performance
  • Integrated holiday mode for reduced occupancy periods
  • Groundwater-stable tank construction
  • Durable injection-moulded polyethylene tanks
  • Reduced servicing requirements and operating costs
  • Suitable for domestic, commercial and light industrial applications
  • Designed for long-term reliability and performance

 

Ideal Applications:

  • Large detached homes
  • Apartment buildings
  • Commercial premises
  • Hospitality and leisure facilities
  • Community buildings and clubs
  • Rural developments without access to mains drainage



Specification Value
Population Capacity Up to 40 People
Dimensions (L × W × H) 7,900 × 2,240 × 2,575 mm
Volume 20,000 Litres
Weight (Empty) 930 kg
BOD 17/12 mg/l
Suspended Solids 14/20 mg/l
Ammonium (NH4-N) 0.5/12 mg/l

 

Population Equivalent (PE) Max. Daily Flow (l/d) Max. Organic Load (kg BOD5/d) Total Volume (L) Length (mm) Width (mm) Height (mm) Product Code
10 1,500 0.60 4,800 2,280 1,985 2,100 G50138
14 2,100 0.84 6,500 2,390 2,190 2,390 G50142
22 3,300 1.68 9,600 5,160 1,985 2,250-2,450 G50024
28 4,200 1.92 13,000 5,380 2,190 2,530-2,730 G50026
35 5,250 2.10 17,000 15,500 2,040 2,515-2,715 G50028
40 6,000 2.40 20,000 15,500 2,240 2,715-2,915 G50030
50 7,500 3.00 26,000 11,360 2,190 2,850-3,050 G50032
60 9,000 3.60 26,000 11,360 2,190 2,850-3,050 G50034
75 11,250 4.50 32,000 9,900 2,500 3,300-3,500 G50036
100 15,000 6.00 44,000 12,900 2,500 3,300-3,500 G50040

 

Graf OneAdvanced Leaflet
Graf OneAdvanced Klaro E PIA Certificate
Free Commissioning

 

SKU: TANONEAGRA004

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Need help choosing the right tank? Call our team on 01388 537050.

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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.

Title

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.