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Klargester Gamma Septic Tank 2800L Twin Stage - 5 Person

£1,365.10
£1,638.12 (inc VAT)
£1,365.10 (exc VAT)

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Product Description

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

 

The Klargester 2800 Litre Gamma Septic Tank (Twin Stage) is a durable, cost-effective solution for domestic properties that are not connected to the mains sewer network. Designed to provide reliable primary wastewater treatment, this high-quality septic tank is ideal for households seeking an efficient and low-maintenance off-mains drainage system.

Manufactured from robust medium-density polyethylene (MDPE), the Klargester Gamma septic tank offers excellent strength, corrosion resistance and longevity while remaining lightweight for easier transportation and installation. Its twin-stage design helps improve settlement and separation of solids, delivering dependable performance for residential wastewater management.

With a 2800-litre storage capacity, this septic tank is suitable for properties with up to 5 people, making it an excellent choice for larger homes, small developments and rural properties. The tank comes complete with a cover and frame and features a 1m invert depth as standard, helping to simplify installation and reduce additional site work.

 

Key Features

  • 2800-litre capacity septic tank
  • Suitable for populations of up to 5 people
  • Efficient twin-stage settlement design
  • Durable and corrosion-resistant MDPE construction
  • Lightweight for easier handling and installation
  • Ideal for domestic off-mains drainage systems
  • Supplied complete with cover and frame
  • 1m invert depth as standard
  • Reliable, low-maintenance operation
  • Trusted Klargester quality and performance

 

Find out everything a new septic tank owner needs to know here.

Installing a septic drain field? Find out everything you need to know here.

 

Unit Storage Volume (Ltr) Dim 'A' (mm) Dim 'B' (mm) Dim 'C' (mm) Dim 'D' (mm) Dim 'E' (mm) Dim 'F' (mm) Dim 'G' (mm) Dim 'H' (mm) Tank Weight
GST028TzGK 2800 500-1000 1255 550-1050 1205 2480 1130 1450 735 250 Kgs
GST035TzGK 3500 500-1000 1255 550-1050 1205 3000 1180 1450 735 280 Kgs
GST040TzGK 4000 500-1000 1255 550-1050 1205 3360 1215 1450 735 310 Kgs

 

Unit 1 2 3 4
GST028TzGK 315mm 460mm 460mm 315mm
GST035TzGK 315mm 800mm 800mm 315mm
GST040TzGK 315mm 900mm 900mm

315mm

 

Gamma Septic Tank PIA Certificate

Gamma Septic Tank Twin Stage Gravity Drawing

 

SKU: TANSEPTKLA019

Why Buy Your Tank from Direct Drainage?

Free Tank Delivery

Tanks ship direct from the manufacturer, with lead times varying by product.

Best Price Guarantee 

Found the same tank cheaper? Send us the quote and we’ll try to match it.

Authorised Supplier

Buy with confidence from a sewage and drainage specialist.

Expert Tank Support

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.