Klargester Alpha Septic Tank

Kingspan Klargester Alpha tank

A traditional sewage disposal solution for domestic dwellings without access to mains drainage

Our Klargester Alpha septic tank range provides a reliable and economic solution for homes and small business premises with off mains drainage. Homeowners with septic tanks that discharge directly into surface water will need to replace or upgrade their drainage as soon as possible.

  • Suitable for individual domestic dwellings up to a large family house.
  • Made from composite GRP, our Klargester Alpha septic tank is strong and watertight.
  • Available in three sizes.

Please note: Homeowners are responsible for their choice, installation and maintenance of their wastewater system under a new code of practice introduced by the Environment Agency. They have a legal responsibility to minimise the impact of your sewage waste if they manage it within the bounds of your property e.g. with a septic tank or sewage treatment plant (Binding Rules 2020, DEFRA, January 2015).

Important Update: Under very specific ground or site conditions, reed beds and converters can occasionally be used to comply with the  General Binding RulesKingspan Klargester's reed beds are low maintenance, easy to install, and Building Regulations-compliant. 

For more information call our team today on 0129 663 3000, or contact us using one of the alternate options below.


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Strong, light and watertight, the specialist design of the Alpha septic tank is ideal for easy installation and handling. A wide, flat shape guarantees minimal visual impact.

Key Features and Benefits

  • Light, watertight and chemically resistant
  • Suitable for homes with between 5-17 occupants
  • Robust, weather proof for guaranteed durability, giving you value for money 
  • Impact resistant - manufactured from composite GRP
  • Performance tested to EN - 12566 (Part 1) - high performance guaranteed
  • CE marked to comply with Construction Products Regulations (July 2013)
Basic septic tanks only retain solids and discharge effluent of low quality. Many authorities in the UK prohibit their use.

In all instances a sewage treatment system should be considered as the first option.

Septic tanks may be installed, subject to consent, in applications where:
  • Soil is of suitable porosity.
  • Installation complies with Building Regulations (Approved Document H).
  • The installation will not contaminate any ditch, stream or other watercourse.

Did you know?

If you have a septic tank that discharges directly to a surface water you will need to replace or upgrade your treatment system by January 1, 2020 – or when you sell your property if before this date.

Environment Agency — General Binding Rules

Technical Specification

No. People
Diameter (mm)
Height (mm)
Standard Inlet Invert (mm) Standard Outlet Invert (mm)
STS02810 2,800 5 2,075 2,599/3,099 1,000/1,500 1,050/1,550
STS03810 3,800 12 2,075 2,810/3,310 1,000/1,500 1,050/1,550
STS04610 4,600 17 2,084 2,984/3,484 1,000/1,500 1,050/1,550

Typical Applications for the Klargester Alpha Septic Tank range:

  • Single/Multiple Homes
  • Caravan & Camping sites
  • Golf Course Toilet/Washroom Facilities
  • Churches
  • Mobile Homes / Static caravans
  • Farms
  • Temporary work offices
  • Offices/Light Industrial Premises
  • Temporary Dwellings & Welfare Facilities

Service and Guarantee

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