Septic Tank Problem in Hertfordshire Solved!

Septic tank problems were identified at this property in Hertfordshire after the homeowner was informed about the septic tank flooding during a routine emptying. Mantair were recommended to the homeowner by a family member to solve the septic tank problems.


After conducting a survey of the existing drainage arrangements it was found that the septic tank problems at this property in Hertfordshire were mainly due to the age of the septic tank and soakaway.  Mantair engineers recommended replacing the failed septic tank with a modern sewage treatment plant.

Based on the property having four bedrooms and in accordance with the British Water Flows and Loads Code of Practice, a six-person Clearwater sewage treatment plant was installed.

The Clearwater plant is a ‘single tank’ system using a Biological Filter Process.  Within the Clearwater system there are three treatment zones.  Within the primary zone coarse solids are filtered and retained for gradual breakdown, whilst the resulting liquid is continuously distributed over a plastic biological suspended filter by an integral airlift, powered by a remote air blower.  The biological filter is designed to promote the growth of aerobic micro-organisms which ‘treat’ the liquids.  Within the final settlement zone fine solids settle to the floor leaving the resulting liquids as the treated final effluent.

The level of treatment within the Clearwater system is far superior to that of a septic tank and complies with the requirements of the Environment Agency for discharge direct to a natural watercourse.


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

We removed all machinery from site and left the grounds in a neat and tidy manner.

If you require the installation of a sewage treatment plant or merely require advice over the telephone regarding septic tank problems in Hertfordshire, please contact us on 01255 853890, or fill out the form below.

Septic Tank Problem in Hertfordshire

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