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 For domestic properties without access to mains drainage a sewage  treatment plant provides a reliable, efficient and environmentally safe  solution to dispose of sewage, with low running costs.  Acting as an independent waste water treatment system, domestic sewage treatment plants are designed to receive all the waste from residential dwellings.  They promote the growth of Micro-organisms which degrade the waste, producing a treated effluent suitable for natural discharging.

A drainage field allows the infiltration of treated effluent into the ground at a controlled rate.  Soil percolation tests are required to be carried out on the land where the drainage field is intended to be built.  It is a test to determine the rate at which the soil absorbs a calculated volume of water and to make sure the soil is suitable.

 The length and design of a drainage field must be calculated on the results of the soil percolation tests and the capacity of the property.

At Drainway Services we are able to undertake the process from start to finish.  We contact all the relevant local authorities, arrange soil percolation testing, calculate and design the required drainage field, source and supply the treatment plant that best matches your requirement and undertake the excavation and installation. 


Treatment Plants


Unique Design and Assured Performance

The patented Klargester BioDisc® is engineered to treat wastewater to the highest level of standards. In terms of ongoing service and maintenance, it offers one of the best returns on investment compared to other treatment processes. Each BioDisc® is designed to ensure 100% compliance with industry requirements, including national and international regulations such as BS EN12256.

The robust patented design of the BioDisc® treatment plant offers complete peace of mind. With low running costs and minimal servicing and maintenance required, the BioDisc® is a high-quality lifetime investment that helps safeguard the health of you and your family.


The Rotational Biological Contactor (RBC) is central to the operation of each Kingspan Klargester BioDisc®. It supports a biologically active film or biomass onto which aerobic micro-organisms, naturally found in sewage, become established. Natural breakdown of sewage can then occur.


The RBC comprises banks of vacuum formed polypropylene media supported by a steel shaft. This is slowly rotated by a low energy consumption electric motor and drive assembly.

Drainage Fields


A drainage field is designed to spread partially-treated effluent over a larger area.  The drainage field will provide further treatment to the settled effluent and disperse it safely into the natural ground.  Biological treatment takes place naturally in the aerated layers of soil.  Drainage fields typically consist of a system of sub-surface irrigation pipes which allow the effluent to percolate into the surrounding soil.