Klargester Alpha Septic Tank

Kingspan Klargester Alpha tank

Klargester Septic Tank

A septic tank provides a traditional solution to sewage disposal needs for domestic dwellings without access to mains drainage. The Klargester Alpha septic tank range provides a reliable and economic solution for homes and small business premises with off mains drainage. Made from composite GRP, the Klargester Alpha septic tank is strong, light and watertight and available in three sizes. It is suitable for individual domestic dwellings up to a large family house.

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Homeowners with septic tanks that discharge directly into surface water will need to replace or upgrade their drainage either when they sell their property or before 1 January 2020 whichever is sooner. 
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).


Product Brochure:

Klargester Septic Tanks Brochure

Product Overview

Key Benefits
Technical information
Literature Downloads
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

Useful Documents

Klargester Product Guide

Klargester Septic Tanks Brochure

PIA Certificate Alpha Septic Tank

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

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