Septic tanks, Water treatment plants, Drainage fields, in North Yorkshire.

A First Class Service.

Contact Us  Tel 07400 670219


Septic Tank Installation North Yorkshire. Water treatment plant installation, North Yorkshire.

Approved installers of septic tanks and water treatment plants 


We install a wide range of tanks from various suppliers in the North Yorkshire area, to ensure that each site has the correct type of septic tank,water treatment tank. to meet the requirements of individual sites.We install tanks to building control regulation standards. Soakaway and Drainfield design to conform with Section H2 of the Building Regulations (Sewage and Drainage issues) and BS 6297 : 2007 + Ammendment 1 2008

Rules you must follow if your septic tank or small sewage discharge treatment plant releases (discharges) liquid to a surface water.

We carry out septic tank installation in North Yorkshire, East Yorkshire and down to the Humber.

The replacement of an existing septic tank, or replacement with a water treatment plant with in North Yorkshire, are usually not an issue to Building Control, as the replacement septic tank is better than the old system being replaced.

The regulations for this are being changed again in 2020 and the usual confusion will continue over planning and how

different councils view installations based on the 2015 regulations. Please contact us for up to date information.

Building Control and new Septic Tank installations and Water Treatment Plant Installations.

We would advise, discuss and show plans of the proposed septic tank or water treatment tank to building control and pay the fee of around £165, to have the installation passed and a certificate issued.

Soakaway and Drainfield design to conform with Section H2 of the BuildingRegulations (Sewage and Drainage issues) and BS 6297: 2007 + Ammendment 1 2008 There are 3 tests which are all mandatory under Building Regulations, that you should undertake to determine whether or not you are allowed to construct, or replace a sewage soakaway. The tests are done in this order:

1. Ascertain whether or not your soakaway site is in an area designated by the Environment Agency, as a Groundwater Source Protection Zone. If it is, then it means that the groundwater underneath your soakaway is used for drinking water and you will not be allowed to pollute it with sewage effluent from a septic tank soakaway.


 2. Trial Site Assessment Hole (TSAH). This is a single, large hole, which is a minimum 2 metres deep. It is to determine that the water table or bedrock, never reaches to within 1 metre of the bottom of the soakaway pipe. Many sites in the UK fail this vital test and many builders and tank installers never carry one out - until it is too late. If this test fails, then it is pointless doing any percolation tests if you are thinking of installing an underground soakaway.

3. Percolation Tests Click here If the water soaks away either too fast or too slowly, then a soakaway is not permitted. In general, clay soils will fail and it is not worth performing the tests. This is the test that most people associate with soakaway tests, as it has been mandatory for much longer that the TSAH. The Percolation Test, tests the porosity of the soil immediately below and surrounding the 300mm of drainage stone in the trench below the pipe.

Percolation Tests should not be performed at more than 1 metre deep to the bottom of the percolation test hole. This is stated in the Building Regulations and the BS6297 2007 as the maximum depth allowed for soakaway pipework is 700mm, with 300mm of washed drainage stone below this in the trench.

Sizing of a soakaway and length of drains: The length of the soakaway drains is determined by the number of bedrooms in the house and the porosity of the soil. The new regulations state that for any house up to and including 3 bedrooms, the minimum size sewage system that can be installed is for 5 persons, with one extra person added for each bedroom. A 3 bedroom house requires a 5 person plant, a 4 bedroom house a 6 person plant, etc.

The porosity can only be determined by a percolation test which measures the time it takes for water to drop 1mm, in the percolation test hole. From this time measurement, known as a V value, the length of drain required can be calculated. For more information please contact us.

Reform of the regulatory system to control small sewage dischargesfrom septic tanks and small sewage treatment plants in England


Building Regulation Drainage fields should be designed and installed as in the photo below, with solid foul water pipes drilled or slots and laid in gravel beds not steeper than 1:200. Perforated pipe land drainage pipe is not allowed or drainage crates as these are for roof water and land drainage.

For More Information please Contact Us

Binding Rules small discharge to the ground

How the VORTEX® Wastewater Treatment Plant Works

Most sewage treatment plants struggle to work when they are under-loaded. A good rule of thumb is that if a plant is working below 50% of its design capacity, there is not enough 'food' from the toilet solids to either grow, or maintain, a working bacterial population. The Vortex has solved this problem by having a simple hand-turned valve, that can turn the amount of air required either up, or down, depending on the number of people using it.

Unique Features of the VORTEX® Sewage Treatment System Vortex wastewater treatment systems. Extremely clean effluent - up to 98.9% pollutant reduction. Fully adjustable to suit the number of people using it.


Sewage Treatment Plant – Vortex System

The acclaimed VORTEX™ Eco Electric sewage treatment plant is the most advanced system in the UK. 
Cheaper to run than non-electric treatment plants

It is the only fully adjustable sewage treatment plant in the UK, ideal for low occupancy situations, which cause massive problems for most treatment plants. You can turn it up and turn it down using a simple hand-turn valve. It also uses the least electricity for the highest effluent standard.

It is the ideal sewage treatment system for 'ECO', sustainable and 'GREEN' sewage treatment projects. Much cheaper than a new septic tank and soakaway installation - the VORTEX™ sewage treatment system can discharge straight to a ditch, stream, river, surface water drain or land drain.You don't need an expensive soakaway drainfield.

Unique Features of the VORTEX™ Sewage Treatment System 

The Vortex Wastewater Treatment Plant Process

Wastewater from the building enters the Vibro Screen box (1). Here coarse air bubbles are used to physically break down solid matter in the sewage and form a mixed liquor with the water prior to treatment.

•    The mixed sewage liquor flows into the Aeration Chamber for treatment (2). A bacterial culture is present in the Aeration Chamber which digests the pollutants in the wastewater.  The bacterial culture must have a constant oxygen supply and this is provided by a fine bubble diffuser at the base of the tank. 

•    The mixed sewage liquor then flows into the Clarification Chamber (3) where it is able to separate into clear, treated sewage effluent and sludge.  The clear effluent is able to flow past the scum baffle and out of the tank.

Churchilldixon, Septic Tank Installation ,
North Yorkshire.
Call: 07400 670219
 © Churchilldixon 2018