Sewage Treatment Plant Installers Cambridge

MantairFor sewage treatment plant installations and repairs throughout Cambridgeshire, Mantair provides homeowners with a complete design, installation and maintenance service.

Throughout rural areas of Cambridgeshire, many properties, both domestic and commercial are not serviced by "mains drainage" for the disposal of waste water.  As leading independent installers of sewage treatment plants and septic tanks, Mantair is ideally placed to provide Cambridgeshire homeowners with a sewage treatment system to meet their budget and site requirements.  All projects are carried out in accordance with Environment Agency Regulations and Section H2 of Building Regulations.

Whether you are seeking a small domestic installation of a packaged sewage treatment plant, septic tank or septic tank conversion unit, or merely require advice over the telephone, Mantair has a track record of service, experience and quality that sets us apart from the rest.  For all sewage treatment plant problems in Cambridgeshire, whether it’s a sewage treatment plant flooding and backing up or causing pollution in ditches, call Cambridge's leading experts in sewage treatment plant repair on 0800 121 6786.

Do you have a requirement for a sewage treatment plant installation in Cambridgeshire?  If so, call Mantair for a Free no obligation Site Visit.


Case Study 1 - Sewage Treatment Plant Installation in Cambridgeshire.National Trust

Client - National Trust.

Location - Rectory Bungalow, Arrington, Cambridge.

Located on the delightful Wimpole Estate in South Cambridgeshire is Rectory Bungalow.  After the renovation of the property in 2012, Mantair were appointed by the National Trust as the preferred contractor to provide a design, installation and commissioning service for the upgrading of an ageing septic tank serving the property.

Survey & Design

On viewing the drainage layout of the property it was found that the existing septic tank was located close to a willow tree.  On inspection of the septic tank it was found that the tank had substantial root ingress which had resulted in the structural integrity of the tank being impaired.  It was therefore necessary to provide a sewage treatment solution that would require the installation of a new tank.

A detailed survey was carried which included a Percolation Test.  The results of the Percolation Test showed that the sub-strata was impermeable and that a replacement septic tank soakaway system would not operate effectively. 

After considering all the various options for foul drainage disposal and the size of the property, Mantair recommended the installation of 6PE (population equivalent) sewage treatment plant with a discharge direct to a nearby watercourse.  It was important that the chosen sewage treatment Airotec sewage treatment plantsystem 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 and the discharge to the nearby watercourse.

Taking into account all of the site requirements, Mantair recommended the installation a 6PE Airotec sewage treatment plant at this rural Cambridgeshire property.


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:

  • Sewage treatment plant CambridgeExposing 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 of the failed septic tank;
  • Backfilling all excavations and leaving the area neat and tidy.


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 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 Cambridgeshire. 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.




0800 121 6786
01255 476 467





Our sewage treatment and drainage engineers operate throughout Cambridgeshire, including Chatteris, Fulbourn, Godmanchester, Huntingdon, March, Northstowe, Ramsey, St Ives, St Neots, Soham, Whittlesey and Wisbech.