Sewage Treatment Plant Installers Berkshire

MantairFor sewage treatment plant installations throughout Berkshire, Mantair Ltd provides homeowners with a complete design, installation and commissioning service. 

Sewage treatment plant installations in Berkshire can be found in areas where access to “mains drainage” is not available.  For new sewage treatment plant installations in Berkshire, Mantair provides homeowners with a complete design, installation and commissioning service, with all projects being carried out in accordance with Environment Agency Regulations and Section H2 of Building Regulations.

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As leading independent sewage treatment plant installers for over 20 years, Mantair has a track record of service, experience and quality that sets us apart.  If you have a requirement for a sewage treatment plant or septic tank installation in the UK, call Mantair for a Free no obligation Site Visit on 0800 121 6786.


MantairCase Study - Sewage Treatment Plant Installation in Berkshire.

Location - Domestic Dwelling, Woodcote, Nr. Reading, Berkshire. 

Mantair Contracts Division was contacted by the owner of a property which is located in Woodcote, Berkshire, regarding the problems being experienced with their existing sewage treatment system.


When Mantair engineers inspected the drainage arrangements it was found that the existing sewage treatment facility was a septic tank which overflowed to an ageing coke filter.  Due to the problems being experienced with the ageing system it was decided to replace the system with a modern sewage treatment plant.


In accordance with the British Water Flows & Loads Code of Practice, Mantair recommended the installation of a 5PE (population equivalent) treatment plant for this three bedroom property.

It was important that the chosen treatment system was installed below ground to ensure there was no visual impact on the properties surroundings.  As part of the project Mantair liaised with the Environment Agency and the local Building Control Department to obtain the relevant approvals for the installation.


Prior to any ancillary works commencing Mantair engineers scanned the proposed location of the new sewage treatment plant and areas where any excavations were taking place to ensure that no underground services were present.

The scope of the installation works included:

  • Exposing the existing foul drainage pipe work and diverting to the location of the new sewage treatment plant;
  • Installation of the sewage treatment plant in a suitably sized excavation, including for a concrete base and backfill;
  • Provision of an RCD protected power supply to the sewage treatment plant installation;
  • Installation of a new 110mm diameter discharge drain to the boundary ditch;
  • De-commissioning and filling – in of the ageing septic tank and coke filter;
  • Backfilling all excavations and leaving the area neat and tidy.

Tank Excavation Mantair Concrete Backfill


On completion of the ancillary works Mantair commissioned the new sewage treatment plant, including setting of air valves, checking all pipe work joints and viewing the discharge into the final discharge chamber.

Mantair removed all machinery from site and left the garden area in a neat and tidy manner.


British Water Codes of Practice for Small Wastewater Treatment Systems

Flows & Loads 3 Sizing Criteria            Installation Guide                       Users Guide


British WaterBritish Water     Installation GuideClick to view the full digital publication online

            Click here to Download PDF                            Click here to Download PDF                         Click here to Download PDF


How Mantair Can Help You!

Mantair offers a comprehensive sewage treatment plant and septic tank service throughout Berkshire. This includes free site inspections, guidance and advice on the most suitable system for the client's requirements, complete installation, commissioning and full after sales care.


Click here to view a sewage treatment plant installation in Surrey.

Click here to view a sewage treatment plant installation in Essex.


For further information e-mail [email protected]


0800 121 6786
01255 476 467





Our sewage treatment and drainage engineers operate throughout Berkshire, including Ascot, Bracknell, Crowthorne, Earley, Eton, Hungerford, Lambourne, Maidenhead, Reading, Sandhurst, Thatcham, Windsor, Wokingham, Woodley.