Tricel Sewage Treatment Plant Problem & Solution

Compromised Septic Tank
Tricel Sewage Treatment Plant
Darsham, Suffolk, IP17
20 January, 2024
Dry, Good Ground drainage
10 Person

Sewage treatment plants are becoming more popular in Suffolk as they provide homeowners with a modern alternative to septic tank systems. As leading independent installers and service providers for sewage treatment plants in Suffolk, Mantair is ideally placed to provide Suffolk homeowners with a sewage treatment plant to meet their site requirements, or provide the expertise required for assessing septic tank problems.

Mantair has been providing a professional service for sewage treatment plant installations throughout Suffolk for over 20 years, with all projects being carried out in accordance with Environment Agency Regulations and Section H2 of Building Regulations.


At this location in Suffolk it was necessary for a failed septic tank to be replaced with a sewage treatment plant installation.  The existing septic tank served a pair of semi-detached cottages located at Darsham in Suffolk.

Mantair was originally contacted by one of the homeowners regarding a complaint they had received regarding the effluent from their septic tank causing pollution in an adjacent field.  Upon inspection, it was evident that untreated effluent was collecting in a depressed area of the adjacent field, causing a serious health hazard.

The existing septic tank was constructed from brickwork.  During the septic tank survey Mantair engineers identified that the septic tank had been damaged and was not functioning correctly, resulting in untreated effluent passing through to the receiving soakaway.  It is most likely that the damage to the septic tank was the cause for the soakaway failure.

Mantair engineers have a wealth of experience in dealing with damaged drainage systems, and the damage to the septic tank at this location was considered to be consistent with accidental damage.  Working in partnership with the UK’s leading drainage insurance claims management company Mantair offers a unique insurance claims management service. Providing expertise in managing insurance claims for the costs of repairing or replacing damaged drainage systems, we work on behalf of property owners helping them to save thousands of pounds in resolving their septic tank problems.


With each of the cottages having three bedrooms, we recommended, in accordance with the British Water Flows and Loads Code of Practice – 4, the installation of a ten person Tricel sewage treatment plant.

Due to the site restrictions it was necessary for the Tricel sewage treatment plant to be installed within a paved area.  To ensure the visual impact on the garden was kept to a minimum we installed the air blower for the system remotely from the tank.  As a standard, the air blower and housing supplied with the Tricel system is located on the top of the tank.

excavation sewage-treatment-plants-suffolk tricel-sewage-treatment-plant

Due to the depth of the existing foul drainage, it was necessary for the tank excavation to be three metres deep.  The quality of effluent discharged from the Tricel sewage treatment plant is clean enough to drain directly into a natural watercourse, and at this location in Suffolk we discharged the treated effluent into a roadside ditch.  With the drainage from the cottages being deeper than the depth of receiving ditch, it was necessary for the Tricel sewage treatment plant to have a ‘pumped’ outlet.

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

As part of the project we liaised with the Environment Agency and the local Building Control department to obtain the relevant approvals for the installation.


On completion of the ancillary works, we commissioned the Tricel sewage treatment plant, including setting of air valves, checking all pipe work joints and viewing the discharge into the roadside ditch.

All machinery was removed from site with the garden being left in a neat and tidy manner.

Could the cost to resolve your septic tank problem in Suffolk be covered under your buildings insurance?

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

If you would like a Mantair engineer to visit you please fill out the form below or contact us on 01255 853890.