Septic Tanks

Aiming to meet and exceed the requirements of all domestic, agricultural, commercial and industrial needs, Cotterill Civils are UK leading suppliers of Septic Tanks. We provide a wide range of tanks, including various types and sizes to offer something suitable for everyone.

What are Septic Tanks used for?

The main purpose of our Septic Tanks is to collect and treat wastewater in a way that’s efficient. They are generally used when a domestic dwelling isn’t connected to the main sewage system as a method for naturally processing sewage.

Our Septic Tanks are found underground and made up of two chambers. Water enters the first chamber of a Septic Tank through an inlet pipe and separates wastewater, leaving a layer of scum (grease and oil deposits) at the bottom. The wastewater then enters the second chamber and exits through an outlet pipe where it will reach a drainage field.

Septic Tanks provide an economic solution for homes and businesses of all sizes that don’t have access to mains drainage.

Here at Cotterill Civils, we are able to offer tanks from 2,800 litres, all the way up to (and beyond) the industrial 79,000 litre tanks!

When choosing a Septic Tank, you’ll discover a choice of styles too, ranging from the Basic Septic Tanks to the Shallow Dig and Cylindrical Tanks. No matter what you’re looking for, you’re sure to find a tank that meets your exact needs and wants because we supply Septic Tanks for all applications!

With leading brands like Marsh, Klargester and Clearwater, we provide you with the option to choose a high-quality tank that boasts durability and versatility. Our Septic Tanks are designed to be robust and lightweight which makes them perfect for various applications.

Septic Tanks are designed with your needs in mind. When compared to other Sewage Treatment Plants, Septic Tanks require less maintenance to ensure effective operation. To make sure that you get the most out of your Septic Tank, avoid flushing items that could potentially block the inlet and outlet pipes (this includes food waste, oils, medical waste and many other materials).

Why Cotterill Civils?

Over the last 25 years, the team at Cotterill Civils have developed a wealth of knowledge and experience when it comes to supplying Septic Tanks for all applications. We aim to deliver our products with a high level of efficiency, ensuring that your products arrive in plenty of time and that you receive an outstanding service.

As experts in installation, Cotterill Civils can also take care of the process from start to finish, guaranteeing complete satisfaction. So whether you’d like us to simply supply the tank or install and service it for you, we can help.

We also have some articles that might be of interest to you in regards to septic tanks:

How to size a drainage field?
How to carry out a percolation test?
How to establish if you are in a groundwater protection zone?
New septic tanks regulation coming into force
Helpful guide to appointing a sewage treatment installer
How to undertake a trial assessment zone?

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Frequently Asked Questions

How do septic tanks work?

The purpose of a septic tank is to treat wastewater from your property, which is not usually connected to the public wastewater system. Wastewater enters the septic tank via an inlet pipe and bacteria breaks it down into 3 layers: solids (sludge) at the bottom of the tank, wastewater in the middle, and grease and oil on the top. The wastewater exits the tank via the outlet pipe into the drainage field or soakaway where it settles onto the soil and filters downwards. The soil naturally treats and disperses the water. The sludge has to be removed regularly to enable the tank to function effectively, preventing build-ups and blockages.

How often do septic tanks need emptying?

As a general rule of thumb, septic tanks need desludging once a year. However, this can vary depending on the tank size, usage and how many people live at the property. A brilliant way to determine whether your septic tank needs emptying is to check that the discharge from the outlet pipe is a light grey colour. If the liquid is dark or includes solid materials, this implies that your septic tank needs desludging sooner rather than later. By having your septic tank emptied regularly, you can trust that sludge will be removed from the bottom of your tank, and it will perform properly. For tips and advice on emptying your septic tank, get in touch with the team at Cotterill Civils.

What are the benefits of installing a septic tank?

Installing a septic tank can be extremely beneficial for you, your business and the environment. For example, when you install one of these sewage treatment systems, you won’t be required to pay the local waterboard to connect to the sewer network. This makes septic tanks a cost-efficient investment for properties in areas where drainage is poor. Using a septic tank ensures that waste isn’t transferred back into the local watercourse. Instead, the water percolates into the soil, usually via a soakaway. As the waste doesn’t enter the sewer system, septic tanks create less pollution which also helps to lower your carbon footprint. Another great thing about installing a septic tank at home is that it encourages you to use your drainage system effectively – ensuring no unwanted items are flushed down the toilet or sink. This ultimately prevents drainage problems from arising further down the line. To find out more about the advantages of our septic tanks, give us a call on 0121 351 3230. We’re on hand Monday to Friday from 8am till 5pm.

What substances should be kept out of the septic tank system?

Items such as nappies, sanitary towels and baby wipes can quickly clog septic tanks, so it’s worth disposing of these with your rubbish rather than flushing them. Harsh detergents and bleaches can affect how natural digestive enzymes work – eventually leading to nasty odours. On top of this, we recommend that you avoid pouring fat, oil or grease down the sink. This is because they can build up in the drainpipes and septic tank, or flow through to the drainage field and clog the soil. Taking good care of your septic tank will ensure it lasts longer and you receive maximum value for your money. If you’re unsure which substances you should avoid putting into your system, feel free to get in touch with our specialists.


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