Sewage Treatment Plant Products

ClearFox Nature [non-electric]

Rated 4.94 out of 5 based on 17 customer ratings
(17 customer reviews)

  • High effluent quality for direct discharges
  • No energy consumption
  • No replacement parts
  • Shallow dig tank with no concrete backfill
  • Odour free
  • Noise free – no mechanical parts
  • Suitable for new builds or septic tank upgrades
  • Nationwide delivery
  • Trade prices
  • EN12566-7 and  EN12566-3 certs
  • British Water approved
  • Contact us for an instant quotation
  • Our friendly team are happy to answer you questions and give free expert advice


The ClearFox Nature is a totally non electric sewage treatment plant. It is the only non electric sewage treatment system on the market that never requires any replacement parts or media. It is both EN12566-3 certified and British Water approved. The modular system design caters for both small domestic and larger applications. Furthermore, we can install the ClearFox Nature wastewater treatment tank as an upgrade to an existing septic tank if necessary. For new builds, a complete ClearFox sewage system with a primary tank is an ideal low cost wastewater treatment solution. It features a gravity outlet and also is suitable for installation in all soil conditions.

Some distinct advantages of the ClearFox Nature are as follows:

  • No electricity costs
  • No replacement parts
  • High effluent quality for direct discharges
  • Single piece watertight tanks
  • Reinforced HDPE tanks do not need a concrete backfill
  • Shallow dig tank
  • Approved for installation in place of any other system
  • Nationwide rapid delivery
  • Long desludging intervals

A clearfox non-electric sewage plant

Why buy a ClearFox Nature non electric sewage system?


For homeowners, the yearly savings are significant. First of all, you will never have to worry about electricity costs. Secondly, there is no need for any specialist maintenance and thirdly, you won’t ever need replacement parts. That’s three ways you can save money with this unique non electric wastewater treatment system.

In addition to that, the ClearFox Nature is odour free and the quietest system on the market. You can enjoy total peace of mind with this system as it cannot break down or fail. There are ClearFox Nature non electric wastewater treatment systems in place all over the world that continue to be both reliable and robust. Not to mention, the extra long desludge intervals. We offer nationwide customer support and service teams should you have any queries or need assistance in any way.


A trade discount is among the many good reasons an installer or a builder would choose a ClearFox Nature non electric wastewater treatment system. The installation process is quick and easy without any need to connect the tank to a power supply. It’s also a shallow dig tank which is suitable for installation in all soil conditions. Not only that, it’s a single piece watertight tank made with reinforced with HDPE that does not require any concrete backfill. The low purchase price and trouble free set up is ideal for budgeting a new build.

Upgrading a Septic Tank to Non Electric Wastewater Treatment

The ClearFox Nature is a perfect solution for upgrading an existing septic tank. This is because we install the bioreactor tank after an existing septic tank. It’s quick and easy to install, without the need to bring a power supply to the tank location. We simply connect the outlet of the existing septic tank into the ClearFox Nature reactor tank, and we then connect the outlet of the ClearFox Nature to an existing soakaway or stream/watercourse – easy! Furthermore, by adding the bioreactor tank after your septic tank you have a system that is totally compliant with EN12566-7 – the EPA standard for domestic sewage treatment systems.

If you would like to upgrade your septic tank and produce cleaner, better quality effluent then the Clearfox Nature is an ideal solution. Just get in touch with a member of our friendly technical sales team. Once we know about your project and site requirements we can give an instant quotation. We are always on hand to answer any of your questions about non electric wastewater treatment and give free expert advice.

The Clearfox nature non-electric sewage system

How Does the Clearfox Nature Non Electric Sewage Treatment Plant Work?

Primary Treatment

Firstly, raw sewage enters the first tank which is the primary chamber. Here, any large solids settle out of the wastewater. These solids settle into the bottom of the primary tank to form settled sludge. This sludge then settles and compacts, allowing for long desludging intervals.

Following that, any fats, oils, grease or scum floats on the top of the water column in the primary chamber. This material forms a scum layer. The primary tank is an anoxic, passive treatment step. As all floating material and all solids remain in the primary chamber, the wastewater that flows forward is cleaned in this primary treatment stage.

The Bioreactor

Once primary treatment is complete, the primary cleaned wastewater flows by gravity into the reactor chamber. A tipping plate spreads the effluent evenly over the entire media surface. The plastic media in the bioreactor has a very high surface area. This surface area is colonised by naturally occurring bacteria. These bacteria feed on the nutrients and organic material in the incoming wastewater, cleaning it to a very high standard.


Most electric systems use small electrical air compressors to aerate the wastewater and to provide the bacteria that complete the cleaning with oxygen. However, the Clearfox Nature uses natural ventilation via a small 1m high vent stack to draw fresh air into the tank. This means the system does not need any electricity. So you have a process driven by naturally occurring bacteria, using natural ventilation for the aeration process. This makes the Clearfox Nature a totally sustainable method of wastewater treatment. Saving you money on operational costs every day.

Have a look at the following explanatory video to learn more about the ClearFox Nature non electric sewage treatment system;

So contact us now about a ClearFox non electric wastewater treatment system

Our friendly team are happy to answer your questions and give free expert advice

Additional information


4 to 48 person models. Modular system for larger developments.

Outlet Type


Inlet Pipe Size

110mm / 4"

Outlet Pipe Size

110mm / 4"
Note: outlet at base of treatment tank

Manhole Extensions Available


Manhole size

Ø 680mm

Tank Material

Reinforced HDPE

Electrical Supply

None required

Electrical Consumption



EN12566-3, DIBT, British Water Approved

CE Marked


Suitable For Below Ground Installation

Yes. Also suitable for above ground installation.

Suitable for Upgrades

Yes – simply place biomodule tank after existing septic tank

Suitable for New Builds

Yes – and can be installed in place of any other system

17 reviews for ClearFox Nature [non-electric]

  1. Rated 5 out of 5

    Simon Rowland

    Not cheap but I wanted non electric. Very few options. I did my research and realised the all the other the non electric plants need replacement parts and good bit of maintenance. So in the end it was a simple decision going for the clear fox nature.

  2. Rated 5 out of 5

    Peter – Cornwall

    Not building a passive house – but like the idea of non electric. Nice slope on my site so was a perfect fit. Installed now a few weeks and its working like a dream. You would not know there was a system installed as totally silent and no smell.

  3. Rated 5 out of 5

    Martina Lloyd

    Installed at our holiday home. Excellent choice as it is not guzzling electricity while we are not there [like other systems] and we have no concerns over arriving to the house after being away for 3 months and something being broken as no moving parts.

  4. Rated 5 out of 5

    Southern Glamping

    Installed a 32 pop system for my glamping site. Was the logical choice. Very happy.

  5. Rated 4 out of 5

    Mark Torpey

    My installer loved the unit. Only issue is we needed manhole extensions as was a deep installation and there was a small extra charge for them. Not really a complaint and was more a mistake by my installer really. Would recommend the nature unit for anyone who wants the best.

  6. Rated 5 out of 5

    John Barnes

    Super unit. Installed it myself over a weekend to replace a very very dodgy existing septic tank.

  7. Rated 5 out of 5

    Fintan P

    Not cheap but I wanted the best. A1 unit. If I ever build again I will get my builder to install another.

  8. Rated 5 out of 5

    A. Saunders

    Recommended by my architect. I am pleased with the choice I made.

  9. Rated 5 out of 5

    John Falton

    Installed for an upgrade at my house. There was no electricity in the only available location for the tank, and bringing a power supply to the tank would have cost a fortune. So while I didnt have much choice in going for non electric – I am ultimately happy with the service I got.

  10. Rated 5 out of 5

    Hugh Breen

    Just what I have been looking for. 5+++

  11. Rated 5 out of 5

    Mr Eco Warrior!

    My name should describe the type of person I am. This was the ONLY option for me.

  12. Rated 5 out of 5

    Paul Kennedy

    Installed one for my holiday home. Wont be using energy in my absence. Very pleased with the end result.

  13. Rated 5 out of 5

    Alan Locke

    A bit more expensive than a regular system, but I really wanted a non electric system. When you compare the nature unit to the other couple of non electric plants on the market it is really a simple choice.

  14. Rated 5 out of 5

    Alan Bizworth

    Got an 8 person unit. Not cheap but very very satisfied with it.

  15. Rated 5 out of 5

    Paul Simpson

    I build high end homes. This is my third unit installed. A very high quality product and they are guaranteed to be trouble free. A no brainer if budget allows you to put one in.

  16. Rated 5 out of 5

    Todd Branner

    Purchased 5 of these for a cluster of houses I am building. Great product. Not cheap but no need to bring a power supply to the unit or do electrical works, etc. I just want total security and trouble free operation.

  17. Rated 5 out of 5

    Fran Kellegher

    Simply the best – but comes at a price.

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