Septic Tank Installers Harwich

MantairFor septic tank installations in surrounding areas of Harwich, Mantair provides homeowners with a complete design, installation and repair service.


Throughout surrounding areas of Harwich 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 Harwich home and business owners with a sewage treatment system to meet their budget and site requirements.

Septic Tank InstallationWhether you are seeking a small domestic installation of a septic tank, septic tank conversion unit or packaged sewage treatment plant, Mantair provides home and business owners a free advisory service, including no obligation site visits throughout the Harwich area.

By providing innovative design and cost effective sewage treatment plant solutions, the Mantair brand has been exceeding customer’s expectations for over two decades.  Offering a full turnkey service from initial site survey and system design to the installation and maintenance of sewage treatment plants and septic tanks, Mantair can provide bespoke waste water treatment solutions for specific site requirements.

All projects are carried out in accordance with Environment Agency Regulations and Section H2 of Building Regulations.


 Free Site Survey

MantairOperating throughout all areas of Essex, Mantair provides a Free Site Assessment Service including no obligation site visits.  During the site visits our trained personnel inspects the existing drainage arrangements and advises the client of the most suitable waste water treatment product for their application.  A detailed description and quotation of the works involved are sent to the client covering all matters relating to the proposed project.  All relevant Environment Agency Permits or Exemption Certificates are applied for on the client’s behalf, free of charge.

If you have a requirement for a sewage treatment plant or septic tank in the Harwich area, click here or call 0800 121 6786 for further information.


What is a Septic Tank

Alpha Septic TankA septic tank receives all of the waste water from the house, including toilet, laundry, bathroom and kitchen waste. The main purpose of a septic tank is to separate the solid material and allow the sludge formed to undergo a process known as anaerobic digestion. This has the effect of reducing the sludge volume and therefore the frequency of septic tank emptying by vacuum tanker.

The effluent from a septic tank is disposed of to a soakaway. Under no circumstances should it be allowed to discharge to a ditch or stream. Such a discharge is an offence under the Public Health and Water Resources Acts and renders the offender liable to prosecution by the Statutory Authorities.  With environmental authorities becoming more stringent, the use of septic tanks has declined in recent years and need for sewage treatment plants has increased.


Sewage Treatment Plants

Sewage treatment plants are increasingly replacing septic tank systems throughout rural areas of Essex.  Unlike septic tanks, sewage treatment plants produce a treated effluent suitable for discharge to ditches and streams and comply with Environment Agency guidelines.  Acting as an independent waste water treatment system, sewage treatment plants are designed to receive all of the waste water from residential dwellings and promote the growth of Aerobic Micro-organisms which degrade the receiving waste water producing a treated effluent suitable for discharge to a natural watercourse.

Clearwater sewage treatment plant

Domestic sewage treatment plants will typically reduce the polluting load in the waste water by more than 95 percent, producing a clear and odourless effluent.  In most instances this level of treatment will enable the effluent to be discharged to a ditch, stream or river after approval from the Environment Agency is sought for England and Wales, or SEPA in Scotland.  Some sewage treatment plants provide a higher level of treatment for areas such as a SSSI (Site of Special Scientific Interest) or RAMSAR Site.

There are various types of domestic sewage treatment plants available in the UK, but these all work on the same principle of developing Aerobic Micro-organisms which reduce the polluting load in the effluent, followed by settlement to remove any fine solids from the treated effluent.  This treatment principle for waste water is the same as the principle used at main sewage treatment works for towns and cities, but on a reduced scale.

Domestic sewage treatment plants have been available throughout the UK since the early 1980’s and are typically referred to as “packaged sewage treatment plants”.  Over the last ten years there have been substantial advances in the design and manufacture of domestic sewage treatment plants.  This together with more stringent regulations has resulted in sewage treatment plants being the preferred option over septic tanks systems for the disposal of waste water for rural locations.

Sewage treatment plants are now produced by a large number of different manufacturers and all of these systems are designed to create an environment to develop the growth of Aerobic Micro-organisms, which degrade the waste water.  The majority of sewage treatment plants require an electrical supply to power either an air blower or mechanical disks or pumps.  On the majority of sewage treatment plants which use an air blower there are no mechanical or electrical components within the underground treatment zone, thus reducing future maintenance costs. 

Mantair Contracts Division has extensive knowledge in the majority of UK sewage treatment plants, including the following Brands:

 tricel SMC tank movie final ver 8.12.2009biodigester sewage treatment plantsbioplus sewage treatment plantsclearwater sewage treatment plantsconder sewage treatment plants

entec sewage treatment plantsklargester sewage treatment plantstitan sewage treatment plantstricel sewage treatment plantswpl sewage treatment plants


All packaged sewage treatment plants we supply and install throughout Essex meet the European Standard BS EN 12566-3.  This standard is mandatory for all ‘packaged sewage treatment plants’ up to 50 population equivalent supplied and installed throughout Europe. This standard does not cover and is not applicable to alternative sewage treatment products such as septic tank conversion units.



On all projects the chosen sewage treatment plant will be inspected by our trained engineers prior to being approved for installation.  The sewage treatment plant is then delivered to site using one of our own transport vehicles to ensure the plant is delivered at the correct time to prevent any delays on site. 



All of our engineers are accustomed to the correct handling and installation of all makes and models of sewage treatment plants. Care is taken at all times during delivery and installation of the sewage treatment plant to negate the potential of any damage to either the treatment plant or the clients property.



BWSewage treatment plants are available to suit anything from a small country cottage to a large commercial application.  When sizing a sewage treatment plant the British Water Flows & Loads Code of Practice should be used.  For domestic dwellings the number of bedrooms is taken and 2PE (population equivalent) is added

  • House with 3 bedrooms = minimum 5PE system;
  • House with 4 bedrooms = minimum 6PE system;
  • House with 6 bedrooms = minimum 8PE system.



To discuss your requirements or arrange for an appointment with a sales advisor, click here or call us. 

0800 121 6786
01255 476 467



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