Solutions for all your drainage needs!

For any information about the range of services available, to get a free quote, or to speak with one of our experts about your requirements, please fill out our contact form. 

Your Trusted Drainage Engineers

S.A. Hewitts Ltd is a family run business with over 30+ years experience in the industry. Our team specialise in installing a wide variety of sewage treatment plants and drainage systems. Based in Wakefield, we cater to clients Nationwide including the Channel Islands and The Hebrides. We will supply and install everything from a 6PE to 1000PE bespoke commercial system, ensuring the same quality service every time.

We pride ourselves on quick response times, innovative solutions and a commitment to quality workmanship throughout your personal experience with our dedicated team. Our engineers expertise and experience have been acquired over many years working across the globe for some of the largest engineering firms in the world, including most recently, their involvement on the UK's biggest sewage project.  


Trust us for all your drainage needs.

Our Services 

Sewage Treatment Plants

With expertise in designing, installing, and maintaining sewage treatment plants for residential and commercial properties. Sewage treatment plants create environmentally safe wastewater by removing pollutants from sewage. There is a wide variety of tanks available for this purpose, making it crucial to select the right one for your property. Trust a knowledgeable team like S.A. Hewitts to handle the installation process effectively and efficiently.

Septic Tanks

Septic tanks, commonly made of polyethylene, fibreglass, brick, or concrete and are typically buried underground to collect wastewater. Designing a new septic system can be quite complex. Choosing the wrong tank size or incorrect installation location can lead to a variety of issues. Regular septic tank servicing is essential on a yearly basis to ensure the system functions correctly and to minimize the likelihood of expensive problems arising.

Surface Water Drainage and Soakaway Systems

Proficient in drainage services, S.A. Hewitts offers comprehensive land drainage solutions, including percolation tests essential for ensuring your property's compliance with building regulations. Soakaways are a traditional method for managing rainwater and liquid sewage waste by storing the fluid and promoting soil infiltration through gradual discharge. Factors such as the soakaway's size, its distance from the property, the property's size, and the nature of the ground all play a role in soakaway design. Count on S.A. Hewitts for their expert handling of septic tank soakaways, drainage fields,  surface water crates with attenuation tanks, and hydro brakes.

Pumping Stations 

Pump stations play a crucial role in various applications to maintain the efficiency of drainage systems and ensure smooth waste and water flow. When the conventional below-ground foul water pumping station is impractical, S.A. Hewitts offers custom design, supply, and installation services tailored to your site's requirements. Whether it's clean water, grey water, or sewage, we can address all your pump station needs effectively.

Drain Surveys

A drain survey will indicate the condition of the system and where the process falls down. We recommend a drainage survey when you are purchasing a domestic or commercial property, It helps you understand exactly what you are taking on and to ensure you don't experience problems after completing on a property purchase. 

What is a Sewage Treatment Plant?

A sewage treatment plant processes your wastewater and sewage independently of the public water mains. An environmentally-friendly process, it produces purified water that is clean enough to be discharged directly into a stream or ditch. It is a potential solution if your property is located a large distance from a sewer. They often require electricity to operate, and will also need regular servicing and emptying.


How do sewage treatment plants work?

A sewage treatment plant operates by circulating air to encourage the growth of naturally-occurring bacteria that breaks down sewage. The goal is to deliver a cleaner effluent that is kinder to the environment. The process itself involves removing any harmful contaminants before discharging non-polluting wastewater into a nearby stream or river without posing a threat to fish or plant life living in the surrounding area.


Five key benefits of having a Sewage Treatment Plant

  • Minimal odour– modern sewage treatment plants give off very little odour
  • No sewage bills– using the public sewers incurs regular bills. Having your own independent wastewater treatment plant will save you from having to pay to send your wastewater into already overstretched public sewers
  • Little maintenance required– once your sewage treatment plant has been installed it will need little looking after to keep it ticking over. Sludge may need to be removed roughly every two years, and it’s advisable to have the system serviced often
  • Reuse and recycle– once the wastewater has been treated, the environmentally-safe product can be reused or released back into the environment. Many people are now also using sludge produced by sewage treatment plants as a source of green energy
  • Environmentally-friendly– sewage treatment plants use natural processes to filter contaminants and produce clean, non-polluting effluent that can then be released directly into a stream or ditch.


Bespoke sewage treatment plant solutions

Choosing the right plant for your requirements can be tricky because there are many different manufacturers and products to choose from. As a truly independent company, we install a wide range of treatment plants from well-known suppliers such as Klargester, Tricel, Vortex, Falcon, Condor and Bio Cell. During an initial consultation, we will discuss the specifications of your building and your wastewater output before providing you with an expert opinion on which product best suits your requirements. All the products we install at both commercial and domestic premises, are EN12566-3 certified and CE Marked – a legal requirement in the UK for all new plants.


Commercial sewage treatment plants

We install tanks of all different capacities, ranging from 6PE up to 200PE, and often beyond for larger commercial properties. As with domestic sewage treatment plants there are many different types of system, including electric and non-electric plants, each with their own advantages. We will provide informed advice on the pros and cons of each system – along with their suitability for your requirements – to help you decide on the best option.

What is a Septic Tank?

A septic tank is a wastewater disposal system that essentially uses bacteria to break down solid waste, allowing liquids to then drain off efficiently. It is kind to the environment, and a worthy alternative to sewerage systems – especially if a building is in an area that’s not connected to the main sewers.

Septic tanks are usually built below ground level and are connected to a home or a property with pipes that allow wastewater to flush directly into a decomposition and drainage system outside.


How does a septic tank work?

A septic tank collects wastewater from a building, which is then separated into different layers.

The water is treated through a natural biological process that separates solids, oils and greases, and water. A layer of grease or oils forms on top, while at the bottom sludge and heavy particles gather.

The bacteria in the septic tank breaks down the heavier parts that are biodegradable, and those are in turn washed out too. The liquids are released into the ground slowly to that they can be absorbed over time. Some waste remains in the tank to be emptied periodically.


Why do you need a septic tank installed on your property?

Septic tanks are needed because if you don’t have this sort of equipment, wastewater and effluence will build up around your property that is hazardous and potentially toxic. For businesses, there are a list of benefits below. However for residential properties it is a more pressing  issue because plenty aren’t connected to the main sewage system. You will be known as the tanks operator. The anaerobic bacterial environment that develops in the tank is what gives the name “septic”. If you are still unsure as to whether or not you are classed as a tank’s operator, then you should contact the Environment Agency for clarification.


Benefits of installing a septic tank

Whether you own a house or a commercial property, if the building produces wastewater you could benefit from the installation of a septic tank. They are not only useful for those properties that don’t have access to a nearby sewage system, but also provide an efficient solution for those seeking an environmentally-friendly way of recycling wastewater without relying on already overstretched public sewers.


Environmentally-friendly– septic tanks recycle water using a natural filtration system. No chemicals are used, waste is broken down by naturally-occurring bacteria, separated and then clarified. Water can then be recycled and released back into the environment. Cost-effective– installing a septic tank is usually cheaper than having a whole new pipe system installed. It allows you to dispose of your wastewater independently so there is no need to make regular payments to a sewage company. Low maintenance– your septic tank will generally only need emptying and servicing once annually to keep it working efficiently. Long-lasting– a well-maintained septic tank should last between 20 and 40 years, sometimes longer!


Bespoke septic tank design

At S.A. Hewitt's, every septic tank we install is a bespoke design to ensure optimum performance.

Our experience in the industry enables us to devise systems that efficiently dispose of liquid waste while adhering to relevant building regulations for either commercial or domestic premises. To achieve this, we consider the size of the property and its estimated usage because incorrectly sizing the tank can lead to problems caused by overloading the system. We also consider the distance of a tank from buildings, structures and property boundaries because each site has a minimum distance that must be adhered to comply with wastewater legislation.


S.A. Hewitt's septic tank maintenance 

Our drainage services include septic tank servicing and maintenance by an off-mains drainage specialist to keep your system operating efficiently for longer, and to help prevent costly problems. If your septic tank has been damaged, we can undertake an assessment to determine what repairs are needed or whether a new one is required. We are also experienced in dealing with assessments and installations for insurance claims, getting your system back up and running as soon as possible.


News

Overwhelmed by the choice available when it comes to the types of septic tank systems?

Conducting research, and improving your understanding of the different types of septic tanks is important for homeowners, property buyers, and professionals operating as inspectors.

For those asking ‘what are the different types of septic tanks’, the simple answer is; there’s a lot!

A comprehensive list of the types of septic tanks can include conventional gravity septic systems, pressure distribution septic systems, aerobic Treatment Units (ATUs), mound septic systems, chamber septic systems, recirculating sand filter systems and peat moss septic systems.

Let’s identify each of those.


Conventional gravity septic systems

The most common type of septic system, it uses the natural force of gravity to treat household wastewater efficiently. Wastewater flows from a property into a septic tank and, once it enters, solids settle and the clarified liquid exits through an outlet pipe. The distribution box then directs effluent to drainfield pipes to undergo further treatment and gradually infiltrate into the surrounding soil, where natural processes remove any remaining impurities.


Pressure distribution septic systems

This type of septic system is a great alternative to conventional gravity flow systems because it operates effectively in locations where soil conditions can cause problems. This system employs pressure distribution, which ensures that the effluent is distributed more evenly across the soil dispersal area throughout the day. This is regarded as one of the best types of septic tank system because it enhances treatment efficiency and removes nutrients effectively.


Aerobic Treatment Units (ATUs)

Among the different types of septic tank, aerobic treatment units are also an option. This is a small-scale sewage system that uses an aerobic method for digestion instead of the typical anaerobic process employed by others. This type of sewage system takes solids and separates them from the wastewater. Next, forced air will mix with the wastewater in a process that supports aerobic bacterial growth and ensures the digestion of solids. Further treatment on the effluent may also occur, using chlorine or ultraviolet light. Once this process is complete, the treated effluent is distributed onto the drainfield. This type of sewage system produces high-quality secondary wastewater that can be sterilised and used for surface irrigation.


Mound septic systems

The mound septic system is useful in cases where environmental and soil issues are rife. For example, perhaps there is shallow soil depth or poor soil structure. It’s comprised of a constructed sand and gravel mound over soil and possibly porous bedrock. The effluent is passed through the distribution pipes within the mound in specific amounts at low pressure. It will then make its way through the layers of sand and gravel within the mound before reaching the soil, where contaminants will then be removed.


Chamber septic systems

Chamber septic systems are designed to handle wastewater from homes built on sites with specific challenges such as areas with a high water table or poor soil conditions. They rely on interconnected chambers which are comprised of pipes which allow effluent to flow through them before being released into the soil for additional treatment.


Recirculating sand filter systems

These systems are an updated version of the traditional, single-pass open sand filter as they eliminate the issue of foul odours emerging. This is achieved by a process of recirculation whereby the effluent is subjected to increased oxygen before being distributed.


Peat moss septic systems

Peat moss septic systems employ natural, renewable, and sustainable materials in the form of peat moss to cope with wastewater. Like most traditional septic systems, the peat moss septic system uses a septic tank. However, the process of treating the wastewater differs slightly as it makes its way through peat moss before being distributed into the soil.


Choosing the right system for your property

The expert team at S.A. Hewitts understands the importance of choosing the right septic tank system for your property.

We can guide you through the process, taking into account factors like soil type and conditions, the size and location of your property, and also the budget you have to spend.


Our team appreciate that it can feel overwhelming to know which solution is best given the range of septic tank types available.

However, informed by decades of experience operating in the sector, our specialist design, installation, and maintenance services for domestic and commercial properties across the UK can be tailored to any circumstances.


If you want to know more about the types of septic tank systems, check out our range septic tanks by calling us on 01924 566230, or emailing us at info@sahewitts.co.uk.


Exceptional Drainage Solutions by S.A. Hewitts Ltd


Expert Engineers

Our expert engineers are highly qualified and experienced in the field, diagnosing and solving all your drainage issues efficiently. 


Independent from Manufacturers 

At S.A. Hewitts Ltd, we take pride in our independence from manufacturers, allowing us to source any tank available in the market. This freedom is instrumental in our ability to provide expert recommendations tailored to suit any location and specific needs.

Family Run Business

S.A. Hewitts Ltd are your trusted family-run drainage service provider. You can rely on our expertise and commitment to quality for all your drainage needs.

Customer Experiences with S.A. Hewitts Ltd


I can highly recommend the team at S.A. Hewitts, having undertaken several projects for my company with more in the pipeline, if you want a first class professional outfit you cannot go wrong with Jay and his teams.



Recently had Jay and his team install a sewage treatment plant for myself and my neighbours. From the first phone call right up to the end of the job we cannot fault him. Thanks again lads much appreciated

SA Hewitts recently installed a sewage treatment plant at my property. Couldnt fault them at all. Jay answered my many questions confidently during his initial site visit which was free, followed by our very reasonable quote sent through not even 24 hour later. The lads on site were great and left my garden in a good condition following the install. Would definitely recommend these guys Thanks again

Trusted Drainage Services

Our company holds industry-recognized accreditations and certifications to ensure top-quality service. We stand behind our work with solid guarantees to provide peace of mind to our customers.


Licensed and Insured Engineers

Our team consists of licensed and insured drainage specialists who are experts in their field.


Certified Drainage Solutions

We offer certified drainage solutions that meet the highest standards of quality and safety.


Satisfaction Guarantee

We provide a satisfaction guarantee to ensure that our customers are fully happy with the services we deliver.

Get Your Free Quote Now!

Contact us for cost-effective solutions for all your drainage system needs. 

01924 566230

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Sunday
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Monday - Friday
07:00 - 18:00
Saturday
08:00 - 13:00