Service & Maintenance Contracts

O’Reilly Oakstown Service & Maintenance Contracts 

In order to ensure your system is working at its best and ensure no damage to the system, Waste Water Treatments should be serviced and inspected on a regular basis throughout the year by qualified technicians.  Once a problem arises the call out charges and inspections can cost much more than having an annual contract which ensures the home owner peace of mind that their system is working optimally.

We are now offering excellent annual contracts and if you book and pay for a Service, we can upgrade you to an Annual Contract that entitles you to:

–          Waste Water Treatment System serviced

–          Emergency Call out Facility

–          Annual Inspection & Service of System

–          Yearly Contracts Available

–          Technical Support included

–          From only €225 per year

Call us now on  0469431389 or Lo Call 1850200702 or complete the form below and we will call you back.

Service & Maintenance Enquiry

2 + 2 = ?

– Does my Septic Tank need Desludging
– Maintenance of a Septic Tank

O’Reilly Concrete Company Profile Video

Find out more about what we do!

The O’Reilly Concrete Group are one of the largest Precast Concrete manufacturers in Ireland and the UK. Take a few moments to watch our newly released video which gives a great overview of our company, and find out what makes us unique. Wholly owned and manufactured by the O’Reilly family, through 3 generations, we work from a total of 6 Manufacturing Plants and we continue to expand our critical customer base through two key drivers – Innovation and Outstanding Customer Service.

Installing New Sewage Treatment Systems & the Cost Involved

Peter Varley talks to Diarmuid O’Reilly of O’Reilly Oakstown Environmental about installing new sewage treatment systems and the cost involved.

After the flooding this year it has become apparent that many septic tanks in rural areas are not working efficiently and may need upgrading. A septic tank is traditionally used for the primary treatment of sewage from most rural houses. Many older houses will only have a septic tank and some form of percolation area for sewage treatment but this is not always sufficient for treating sewage.

“In the septic tank the sludge settles, while the crust floats and the liquid or grey water moves on to the percolation area. Over 99.5% of all solids should be retained in the tank,” explained Diarmuid.

Sewage treatment takes place here via anaerobic digestion, generally breaking down the effluent by 30%. Diarmuid says that, typically, in older systems the grey water (partially treated sewage) goes to the percolation area where the soil is expected to do the remaining 70% of sewage treatment.

How the system should work

Diarmuid believes that a lot of Irish soils are unsuitable to carry out this level of sewage treatment and secondary treatment is usually required.

A secondary treatment system takes the partially digested water and feeds it to bacteria that break it down further.

There are many different types of secondary sewage treatment systems.

In Oakstown they use a three-chamber secondary treatment process to digest, clarify and then pump the water from the two primary chambers. In the bioreactors aerobic bacteria are cultured on durable netted plastic biomedia. This gives the microbes adequate surface to attach to while air is blown through the tubes from a low-watt blower sitting on top of the tank.

The air enters the tubes from the bottom of the tank and diffuses into millions of tiny bubbles, allowing the aerobic bacteria to thrive.

The inclusion of both air and grey water activates the bacteria to work on further breaking down the sewage via aerobic digestion, and making it less harmful to the environment.

The second chamber acts as a clarifier to periodically remove any solids which may get to that stage. The final chamber is the discharge area. Here a water pump moves treated sewage from the system to the percolation area. Diarmuid says up to 99% of the sewage treatment efficiency can be achieved after it goes through the combination of primary and secondary treatment.

Repairing an existing system

The main signs that a sewage treatment system is not functioning properly is water backing up in sewers and ponding around the percolation area. Sometimes it may be possible to fix a tank by fixing the T-bend where the waste enters the primary tank.

A properly functioning T-bend slows down the rate of movement of solids into the tank, reducing the splash effect in the tank so that a scum layer can form creating anaerobic conditions for waste water treatment.

Baby wipes should never be let into a tank because they cannot be broken down and cause blockages.

However, many old sewage treatment systems are beyond repair and are not fit for purpose. Some older tanks have structural cracks or the percolation system no longer works efficiently. Diarmuid believes these systems should be upgraded. Certainly, both septic tanks and sewage treatment systems should be desludged regularly.

Installing a new system

Planning permission is required when installing a new system but this is on the basis of a report from a soil engineer who will assess the site and recommend what type of treatment system is necessary.

A site assessment will determine whether or not a particular site can achieve the safe dispersal of wastewater from a development. Diarmuid says soil engineers carry out T-tests and P-tests. Very good soils that are efficient at treating grey water in a percolation area will typically have a T-test result of five to 20.

Extremely free-draining soils with a T-test result under five would likely require a secondary treatment system because partially treated sewage may make its way directly into groundwater or wells too easily.

On the other hand, wetter soils with a T-test over 20 would also be more likely to require secondary sewage treatment because in time there may be a risk of clogging in average to poor soils.


The cost depends on the size of household being serviced by the sewage treatment system. As a rule of thumb, to calculate the size of the septic tank required, multiply the number of people in the house by 150 litres (as a person uses 150 litres/day) and add 2,000 litres. For example, an eight-person house is (8 x 150) + 2,000 = 3,200 litres. Diarmuid says to service this household with a primary and secondary treatment system it would cost €3,500 including VAT. This includes installation costs, wiring, a low-watt air blower and water pump but, excludes a soil engineer assessment, planning permission and percolation area costs.

Grant Aid

Householders who have registered their system by the prescribed date of 1 February 2013 may be eligible for grant aid to repair or upgrade their system.

This grant aid is only available if an inspector finds problems with your treatment system and gives recommendations in an advisory notice.

Households with incomes of up to €50,000 per annum will be eligible to apply for a grant of 80% of approved costs, with a maximum grant payable of €4,000. Households with incomes of between €50,001 and €75,000 will be eligible for a grant of 50% of approved costs, with a maximum grant payable of €2,500. Households with incomes over €70,000 do not qualify for grant aid.

You cannot apply for grant aid unless you receive an inspection from your local authority and subsequently fail, and you cannot ask for an inspection.

By Peter Varley Farmers Journal 7th July 2016


Rainwater Harvesting Systems

Water charges may have been shelved for now but there are still many farmers involved in local water schemes where water charges remain high.

For farmers involved on local water schemes, installing a rainwater harvesting system is a viable option to reduce water bills. It would be preferable to install a system that would provide potable water that can be used as drinking water for livestock and for washing out milking parlours. However, simply installing a tank that is used to collect water that can then be used to wash out slatted sheds etc, could help reduce your water bill.

Organic capital investment scheme

TAMS II offers grant aid to organic farmers for rainwater harvesting systems under the Organics Capital Investment Scheme to improve their agricultural buildings and equipment. The scheme offers 40% grant funding or 60% for young farmers, up to a ceiling of €80,000 per holding. The minimum amount of investment required to avail of grant aid is €2,000. This scheme is only open to licensed organic operators who are registered with the Department of Agriculture, Food and the Marine.

A rainwater harvesting system comprises of collection, filtering and storage of rainwater while the further treatment of collected rainwater is optional. The basic requirements for any rainwater treatment system is well-maintained, clean gutters directing the rainwater to a suitably sized and constructed holding tank from where the water is then distributed.

The components of a rainwater harvesting system are:

  • Roofed area to collect rainwater.
  • Clean gutters to collect rainwater from a roof.
  • Rainwater downpipes in good condition.
  • Filter to remove debris from rainwater.
  • Covered drains to direct rainwater from gutters to storage tank, where required.
  • Sump tank and sump pump where required.
  • Rainwater storage tank with calmed inlet and overflow.

Only rainwater from roofs of buildings is permitted to be collected for harvesting if you wish to avail of grant aid. This water must be further treated if it is to be used as drinking water for livestock or irrigation of horticultural crops. It must also be treated if it is to be used to wash milking parlours as this water needs to be of potable standard.

Tanks can be situated either above or below ground, but must be covered with a solid cover that prevents the ingress of any dirt into the tank. Floating covers are not permitted. All tanks must also be fitted with a proprietary calmed inlet to prevent the disturbance of any sediment at the bottom of the tank. It is important that the system is set up to avoid stagnation by ensuring that pipe work connections allow the flow of water through the tanks.

All tanks must be fitted with an overflow outlet attached to a suitable clean water drainage system to allow water to discharge during storm events.

When deciding on what size tank you wish to install, it is important that it has sufficient capacity to hold between a minimum of seven days’ and a maximum of 18 days’ rainfall from the collection area. The capacity is based on the average rainfall for the location of the tank, the size of the collection area and the demand on the harvested water. Exact rainfall figures for any location can be obtained directly from Met Éireann.

Water treatment

Treatment of the collected rainwater is optional. However, it should be noted that unless the rainwater us treated it will not be of potable standard. As such, this means it cannot be used for washing bulk tanks or milking machines on a dairy farm. It can also not be used for feeding to lactating dairy cows. All rainwater harvesting systems must have filters installed to filter any debris from the rainwater before it enters the rainwater storage tank. They must also be proprietary self-cleaning filters, with the use of homemade filters not permitted.


The costs of a rainwater harvesting system can vary greatly. Contact O’Reilly Oakstown today to find out what the cost of your system would be.

Article By William Conlon of Farmers Journal on 07 July 2016 Survey

Engagement Strategy under the National Inspection Plan: Domestic Wastewater Treatment Systems
The EPA have just launched a new website which will make it easier for people to get information about the quality of their local river, lake, estuary or the hidden waters below ground. It will also provide information about what people can do to help protect their local water catchment. allows easier public access to water-related environmental data that has been gathered by the EPA and other bodies, with maps pages and nearly 5000 dynamically generated pages of data that will be updated regularly, including long term trends for many waterbodies. The site will also have stories from local communities around the country. The resource is the culmination of extensive collaboration between the EPA, local authorities and other organisations in compiling key datasets. Read Full Press Release Here. are currently running a survey on Septic Tanks and how you relate to your local catchment.

They would like to use the results of this survey to improve communication with local communities, specifically on the possible health and environmental risk from malfunctioning septic tank systems. Please help out by completing the survey on this link  or clicking the button above.


Recruitment Notice Waste Water Maintenance Technician


Part of the O’Reilly Group, O’Reilly Oakstown has been providing wastewater treatment solutions for both the domestic and commercial market with their award winning BAF wastewater treatment system since 2004. O’Reilly Oakstown also manufacture Rainwater Harvesting Systems, Agricultural Retaining Walls and Oil/Water Separators

Due to the continued success and growing business we have an immediate vacancy for a 

Waste Water Maintenance Technician

The successful candidate will be responsible for carrying out operational and service maintenance of Residential and Commercial Waste Water Treatment Systems.

The job is demanding in that is it based on time schedules of customers.

Previous experience in a  similar role within the Waste Water Industry preferable.

Excellent Customer Service Skills essential.

Fluent English essential.

In return we are offering competitive package for the successful candidate.

This position is a Full Time Permanent role.

To apply please forward your CV and cover letter to

Recruitment Notice – Hiab Rigid Driver Job

Part of the O’Reilly Group, O’Reilly Oakstown has been providing wastewater treatment solutions for both the domestic and commercial market with their award winning BAF wastewater treatment system since 2004. O’Reilly Oakstown also manufacture Rainwater Harvesting Systems, Agricultural Retaining Walls and Oil/Water Separator

Due to our continued success and expansion we are currently recruiting

HI-AB Rigid Driver

The ideal candidate must have a minimum of 3 years HI AB experience, outgoing personality with excellent customer service skills.

Essential Requirements:

  • Applicants must have a full Clean C Licence, Digital Tachograph card, up to date CPC’s completed and Valid Safe Pass.
  • Experience and knowledge of Nationwide road network an advantage.
  • Fluent English essential.

This is a Full Time Permanent role which will be based between our Kingscourt and Trim Office.

To apply, please forward your CV and cover letter to

O’Reilly Oakstown on RTE

Ear to the Ground with O’Reilly Oakstown demonstrating how a Septic Tank Upgrade is installed.

O’Reilly Oakstown manufacture the BAF Sewage Treatment System, Septic Tanks, Oil Water Separators, Rainwater Harvesting and Oil Theft Solutions. They are an award winning company providing Environmentally Friendly Sewage and Water treatment Products

O’Reilly Oakstown Eco Eye

O’Reilly Oakstown on Eco Eye featured once again on RTE television

Last time they took part in a programme filmed by the Ear to the Ground crew on upgrading an existing septic tank in Wilkinstown Co Meath. This time they are shown replacing a septic tank with their Oakstown BAF secondary treatment System in Rathfeigh, also in Meath on Duncan Stewarts’ Eco Eye on Tuesday, January 22nd.

Eco Eye, as most people know, is concerned with all the relevant environmental topics relating to building in Ireland. With the new septic tank inspections coming online this year and the promise of grants for necessary upgrades there has never been a more apt time to air this feature.

Other Meath names associated with next Tuesdays programme are Robbie Meehan, soil engineer from Navan and Gordon Mitchell from Mitchell Environmental, Kilberry

Watch it Here Now:

Braveheart Trim Castle

O’Reilly Oakstown are proud to be associated with the 20th anniversary celebration of the Filming of Braveheart in the historic town of Trim

“If you have never visited Trim with its magnificent castle and surroundings before, do yourself a favour and see it this year. It’s a fascinating tour and a great day out.”


Map of Product Locations

Locations throughout Ireland where O’Reilly Oakstown have installed products e.g. BAF Sewage Treatment Systems, Septic Tanks, Rainwater Harvesting, Oil Water Separators etc.

We deliver the following products throughout Ireland North & South: Septic Tanks, Wastewater Treatment Systems, BAF Sewage Treatment Systems, Rainwater Harvesting Systems, Concrete Tanks, Concrete Fencing, Pumps for Septic Tanks, and more.

Contact us today if you need to discuss a new septic tank or sewage treatment system.