Tricel Sewage Treatment Plant Problem & Solution

Failed soakaway
Tricel Sewage Treatment Plant
Stevenage, Hertfordshire, SG4
21 July, 2014
Dry, High Water table, Poor Ground drainage
6 Person

As a leading ‘off mains’ solution provider throughout Hertfordshire and surrounding Counties, we have seen a substantial increase in the number of calls relating to the replacement of failed septic tanks with modern packaged sewage treatment plants throughout 2014.  This is partly due to the winter storms of early 2014 causing much of the Country to receive excessive amounts of rainfall, resulting in flash flooding and a rising water table.  The rising water table and saturated ground conditions caused many septic tank soakaways to fail.

We were contacted by the owner of a property on the outskirts of Stevenage in Hertfordshire after they had experienced several months of their septic tank flooding in early 2014.  The homeowner wanted to replace the existing septic tank and drainage field with a system that would operate effectively throughout the winter months.

Upon inspection, it was found that the foul drainage from the property to the existing tank was in good condition with no fractures or dislodged joints.  Located on the boundary of the rear garden was a field ditch which would provide a suitable location for the disposal of treated effluent.


Mantair engineers recommended the installation of a packaged sewage treatment plant and remote Beehive blower housing.  The treatment plant was installed with a ‘pumped’ outlet ensuring that the system would operate effectively even if the receiving ditch became flooded during periods of heavy rainfall.

Throughout the duration of the works Mantair engineers ensured that the impact on the garden was kept to a minimum.


Mantair provides a comprehensive septic tank and sewage treatment plant service throughout Hertfordshire. 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.

If you would like a Mantair engineer to visit you regarding a septic tank problem or sewage treatment plant installation, please fill out the form below or contact us on 01255 853890.

See a Mantair sewage treatment system installation on Channel 4 Grand Designs