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McAllisters are one of the leading environmental services companies in Ireland.  We offer liquid waste disposal, equipment for hire, treatment systems and pump sales. We’re fully insured and accredited to give you complete peace of mind. We work across Northern Ireland and into the Republic, our specialists will provide you with a professional and fast response.

Whether you need to arrange for routine cesspit emptying or septic tank emptying, or in case of an emergency, call 028 30263067 for immediate sewage collection 24/7. McAllisters provide high quality and low-cost cesspit and septic tank emptying services for domestic, industrial, commercial, utilities and marine for when a property or site cannot connect to the mains sewerage system.

Whether you are a homeowner with a septic tank or cesspit in a remote location or you manage a large commercial business, we will arrange and carry out your septic tank and cesspit emptying quickly with minimum fuss. We can also collect waste from sewage treatment plants. Getting your septic tank or cesspit emptied regularly helps to avoid the risk of overflow, blockage and costly damage to your sewage system and the environment.

Septic Tank Emptying and Cesspit Emptying

We can also arrange high-pressure water jetting to leave your septic tank or cesspit in a clean condition. If you are worried about blockages or breakages in your sewerage or drainage system, we can provide a CCTV drain survey to identify problems. Should we identify any issues that need attention we can provide a timely response and a competitive rate to repair or replace any part of your sewerage or drainage system. We are a licensed waste carrier and fully accredited for sewage disposal, give us a call to discuss your requirements you may have with our friendly team.

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028 30263067

Need your Septic Tank emptying in or around Newry, Belfast or L-Derry?

We’ll clear your septic tank – fast!


You should have your septic tank emptied frequently depending upon the level of use, the size and type of your tank. As part of your routine maintenance for your septic system, you should carry out septic tank emptying and have the solids and sludge removed from your tank at frequent intervals. It is important to monitor your septic tank or cesspit and arrange for it to be emptied before it is full. Regularly emptying will also help prevent the risk of a spill into the local environment, damage to your drain field, soakaway or other filtering method.

How to tell if your Septic Tank needs emptying?

Your septic tank is one of the most important parts of your house. It is vital that you act quickly if your septic tank needs emptying, but how can you tell?

Here are a few examples to help you:

  • Water is pooling around the area of the tank. As your septic tank fills up solid waste can clog the drain. This in turn forces liquid to the surface of your lawn or field.
  • Slow drains and flushing toilets. If your drains are still clogged after using unblocking methods then a septic tank emptying is what you need.
  • The smell. This is probably the sign most associated with full septic tanks. The waste from your toilet, shower and washing machine are overflowing, need we say more.
  • Overly healthy grass. This one might seem like a benefit at first but are a good indicator that the problems above are on the way.

How Much Should it Cost To Empty a Septic Tank or Cesspit?

The frequency and cost for sewage collection from your septic tank or cesspit will depend on the size of the tank. Charges are per 1000 gallons.

McAllister Group Residential Client Services, Waste Management and Maintenance, Septic tank emptying

What is the difference between a Cesspit and a Septic Tank?

A Septic Tank

A septic tank is a holding tank designed to receive sewage and is primarily a liquid/solid separation system which holds the content for a period and then releases a clarified effluent through an outlet to a soakaway. An anaerobic bacterial environment develops in the tank which decomposes or mineralizes the waste in the tank. As the name septic implies, the sewage entering the tank becomes septic. It is possible that sometimes smells will be detected from somewhere in the drainage system. Some septic tanks may have an electric pump installed after the system to pump the effluent away.

Maintenance: Have the tank emptied on a regular basis. Make sure the outlet has at-piece (dipper pipe) installed to stop solid debris going down to the soakaway and eventually blocking it up. Do not connect any rain or surface water drainage into the tank. Have the pump (if fitted) checked & cleaned on a regular basis to ensure good operation.

A Cesspit

A cesspit is simply a holding tank without an outlet and will require emptying on a frequent basis depending on usage. Cesspits are a solution for properties without any mains drainage and where the discharge of treated effluent is not possible due to unsuitable ground conditions, or where infrequent use, such as for a holiday home, would prevent the use of a septic tank or packaged sewage treatment plant.

How often should a cesspit be emptied?

Cesspits require emptying on a regular basis. Of course, the time between emptying depends entirely on the size of the property and how many people are using the cesspit. Some tanks may need to be emptied monthly, some may only require once annually – and the real number could be anything in between.

Maintenance: Check the level frequently and have the tank emptied before it gets full. You may want us to install a high-level alarm system to warn you when the tank is nearly full and you can book us to empty it before it overflows!

If in doubt, talk to McAllisters.

We work hard to help clients follow best practice and protect the environment and waterways from pollution caused by wrongly installed or badly maintained wastewater and sewage discharge systems.

McAllister in Newry,
91 Drumalane Road, Newry,
Co.Down, N.Ireland, BT35 8QJ

McAllister in L-Derry,
Unit 2, Benbow Industrial Estate,
Eglinton BT47 3DW

McAllister in Belfast,
Unit 2 Glenand Centre,
Blackstaff Way, Belfast BT11 9DS

How does a Septic Tank work?

Most properties in Ireland are connected to the public wastewater system, which carries waste to the treatment works where it is cleaned so that it can be safely returned to the environment. Responsibility for this system usually lies with your water and sewerage company.
Where homes and buildings are off the beaten track without access to the sewerage network they usually require a septic tank. If you have one, then it’s your responsibility to keep it in good order, so that you benefit from a functioning sewage system, don’t pollute the environment, or fall foul of the law.
It’s important that you understand how it works and why, so that you can do your bit in ensuring that it does it properly.
Septic tanks use natural processes to manage sewerage over time in a sealed environment. Your drain takes wastewater from your bath, toilet, sink, kitchen and washing machine etc. to the septic tank.
Solid matter then settles at the bottom of the tank and, over time, decomposes to form a dense sludge. This then has to be manually removed at regular intervals by a specialist waste company.
Once the solids have settled, the remaining liquid is allowed to drain out of the tank and percolate into a drainage field or soakaway. This may be a grassed or gravelled area where the liquid waste benefits from natural cleansing by the surrounding ecosystem.
Any scum – fats, grease etc, rise to the top of the liquid to form a layer on the surface. This too must be removed by a specialist waste handler and disposed of according to regulations.

Tips for Septic Tank Owners.

Maintain the balance of the natural bacteria which treats the sewage.

Chemicals, anti-bacterial agents, bleaches etc will interfere with the eco system required to break down the waste matter. Check that all cleaning products going into your drains are septic tank-friendly.

Don’t flush too much water into the tank. This will also upset the tank’s natural processes. This can happen if you run washers and dishwashers too frequently, for instance, or if you connect rainwater pipes to the system. Not only will too much water dilute the bacteria and prevent it from carrying out its decomposing function, high water flow (in wet weather, for instance) may cause solids to be swept straight through instead of being allowed to settle in the bottom of the tank.

Check the soakaway regularly. The drainage field is as important as the tank itself and is an integral part of the process. As long as the septic tank installation was appropriate for the environment and property, it should cope with volume of effluent. Remember that in prolonged wet weather, sodden ground may be unable to absorb more liquid, forcing the waste to the surface or back into the tank.

Maintain your tank. You must have the sludge and scum professionally removed at appropriate intervals. If you don’t, accumulated matter will eventually stop the tank from working as it should. Removal is easily arranged. McAllisters offer a contract so that you don’t even need to be home when the work is done. We can advise you how often it should be done, according to the size of the tank and number of occupants at the property. A planned maintenance contract also has the advantage of fixing the price for up to three years. And you’ll get all the requisite paperwork for your records.

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