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GRAF OneAdvanced Klaro Sewage Treatment Plant 35PE | G50028

Over 17,000+ Happy Customers

GRAF OneAdvanced Klaro Sewage Treatment Plant 35PE | G50028

£7,150.00
£8,580.00 (inc VAT)
£7,150.00 (exc VAT)

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Product Description

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

 

The GRAF Klaro E Professional 35PE Sewage Treatment Plant is a high-capacity wastewater treatment solution designed for larger residential properties, commercial developments and multi-occupancy sites serving up to 35 people. Using advanced Sequential Batch Reactor (SBR) technology with innovative air-lift pumping, the system delivers reliable, energy-efficient sewage treatment while achieving excellent effluent quality and keeping maintenance requirements to a minimum.

The system consists of two robust 8,500-litre underground tanks, providing a total treatment volume of 17,000 litres. Manufactured from durable injection-moulded polyethylene, the tanks are engineered for long-term performance and groundwater stability. Unlike conventional treatment plants, the Klaro E Professional features no moving parts inside the tanks, significantly reducing wear, servicing requirements and the risk of mechanical failure. Wastewater is processed using three highly efficient air-lift pumps powered by a low-maintenance compressor housed within an internal control cabinet. The intelligent control system continuously optimises treatment performance while maintaining low power consumption. An integrated holiday mode automatically adjusts operation during periods of reduced usage, helping to improve efficiency and reduce running costs.

 

Key Features & Benefits:

  • Suitable for properties and developments serving up to 35 people
  • Advanced SBR (Sequential Batch Reactor) wastewater treatment technology
  • Two 8,500-litre underground tanks providing 17,000 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 residential properties
  • Apartment buildings and shared accommodation
  • Offices and commercial units
  • Holiday parks and leisure facilities
  • Community centres and clubs
  • Rural developments without access to mains drainage

 

Specification Value
Population Capacity Up to 35 People
Dimensions (L × W × H) 7,500 × 2,040 × 2,515 mm
Volume 17,000 Litres
Weight (Empty) 780 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 Klaro E 35PE Product Specification
Graf OneAdvanced Klaro E PIA Certificate
Graf OneAdvanced Leaflet

SKU: TANONEAGRA003

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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.

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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.