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What you need to know about the

General Binding Rules 2020

The UK General Binding Rules 2020 (GBR 2020) is a set of regulations that came into effect on 1st January 2020, which apply to anyone who owns, operates, or uses a septic tank or small sewage treatment plant (STP) in England. These rules are designed to protect the environment and human health by ensuring that domestic wastewater is treated and disposed of safely and effectively. What are the implications of the GBR 2020 for septic tanks and why are treatment plants a better alternative?

A Cotswold Drainage van ready to fix some blocked drains

Implications of the GBR 2020 for Septic Tanks

The GBR 2020 requires all old tanks that discharge into surface water to be upgraded or undergo a septic tank conversion by 1st January 2020 or when the property is sold, whichever is sooner. Septic tanks that discharge into the ground are exempt from this requirement but must still comply with the general binding rules. These rules include:

  1. Septic tanks must be installed and operated in accordance with the manufacturer's instructions.
  2. Septic tanks must be maintained and emptied regularly to prevent overflowing or pollution.
  3. Septic tanks must not discharge into a watercourse, unless it meets the relevant environmental standards.

Septic tanks can be effective at treating domestic wastewater, but they have limitations. They only provide primary treatment, which means that the wastewater is only partially treated before it is discharged. This can result in the pollution of the environment and cause harm to human health. Furthermore, septic tanks require regular maintenance and emptying, which can be expensive and inconvenient.


Get in touch

Contact our friendly and professional team via form, phone or email for any drainage issues you may have.

From blocked drains to septic tank repairs and replacements, we're here to help. We have over 25 years of experience and offer 24/7 emergency callouts.


Very pleased with service provided by Cotswold Drainage, Luke did a great job. Would certainly recommend them, very efficient. Arrived on site when promised and solved the problem, can't ask for more than that.
- Phil Timms
I’d happily use Cotswold Drainage again - the engineer arrived and within a couple of minutes had not only identified the problem but cleared the blockage. He then went on to give everything a good hose down and then did a camera inspection to make sure there were no more issues further down the drain. Highly recommended.
- James Coulter
Very good service, got the the job done 👍
- Philip Webb
I was impressed not only by the speed and professionalism of the work done to install a new septic tank, but by the considerate friendliness of those who carried it out and of those conducting correspondence about the job.
- Robin Gilbert
Luke and his colleague were efficient, friendly and very professional. They arrived on time, kept me well informed and were just brilliant all round. I'd previously used a well known, national company and the contrast was remarkable. The previous company provided me with very little information, they refused to guarantee their work because a manhole was covered with a slab and once the blockage was cleared they left. Cotswold Drainage guaranteed their work and cleared the underlying problem, rather than the symptom. An all round excellent company to deal with.
- L Lynass
A great, straightforward service, thank you! Customer service is excellent - there was a problem with the date we originally booked, but it was quickly resolved by Richard, and he was very apologetic. The engineer who came out was Adrian. He was on time, called ahead of arrival as requested, and was very polite. Did a great job. Thanks guys!
- Zoe - The Wild Oven
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    Why Treatment Plants are a Better Alternative

    Sewage treatment plants are a better alternative to septic tanks because they provide more effective treatment of domestic wastewater. They use a combination of mechanical, biological, and chemical processes to treat wastewater to a higher standard than a septic tank. The treated water can then be safely discharged into the environment, meeting the relevant environmental standards.

    Treatment plants are also more flexible than septic tanks. They can be installed in a wider range of locations, including areas with high water tables, and can be adapted to suit the specific needs of a property. Furthermore, septic tank maintenance is required more often making treatment plants a more cost-effective waste solution.

    Drain unblocking process

    The UK General Binding Rules 2020 have implications for anyone who owns, operates, or uses a septic tank or small sewage treatment plant.

    Septic tanks that discharge into surface water must be upgraded or replaced by a sewage treatment plant to comply with the rules.

    Treatment plants are a better alternative to septic tanks because they provide more effective treatment of domestic wastewater and require less maintenance.

    If you have any questions about the GBR 2020 or the installation of a sewage treatment plant, please contact our friendly team today.

    Drain unblocking process

    Why choose Cotswold Drainage?

    As a leading drain cleaning company, Cotswold Drainage has more than 25 years of experience, is CHAS-approved for health and safety, and is a member of Constructionline. You can rely on us to maintain and clean your drainage system in emergency situations and across commercial and domestic properties with the least amount of disruption possible. We make use of the most cutting-edge technology and can schedule follow-up visits both during and after your 6-month warranty.

    Why choose Cotswold Drainage for blocked drains?

    What we offer

    Here at Cotswold Drainage, our team have over 25 years’ experience and the expertise guaranteed to sort your problem quickly with minimum of fuss, leaving you more than satisfied.

    We offer a 6-month warranty, along with a free drain camera health check and a guarantee that you will receive follow-ups during and after your 6-month warranty.

    We operate a large fleet of vehicles, equipped with specialist equipment for any situation, including our high-power jetting system for removing blockages & cleaning, and also CCTV for on-site surveying of the problem or damaged drainage systems.

    Don’t just take our word for it, read our incredible reviews left by our valued customers

    Very pleased with service provided by Cotswold Drainage, Luke did a great job. Would certainly recommend them, very efficient. Arrived on site when promised and solved the problem, can't ask for more than that.
    - Phil Timms
    I’d happily use Cotswold Drainage again - the engineer arrived and within a couple of minutes had not only identified the problem but cleared the blockage. He then went on to give everything a good hose down and then did a camera inspection to make sure there were no more issues further down the drain. Highly recommended.
    - James Coulter
    Very good service, got the the job done 👍
    - Philip Webb
    I was impressed not only by the speed and professionalism of the work done to install a new septic tank, but by the considerate friendliness of those who carried it out and of those conducting correspondence about the job.
    - Robin Gilbert
    Luke and his colleague were efficient, friendly and very professional. They arrived on time, kept me well informed and were just brilliant all round. I'd previously used a well known, national company and the contrast was remarkable. The previous company provided me with very little information, they refused to guarantee their work because a manhole was covered with a slab and once the blockage was cleared they left. Cotswold Drainage guaranteed their work and cleared the underlying problem, rather than the symptom. An all round excellent company to deal with.
    - L Lynass
    A great, straightforward service, thank you! Customer service is excellent - there was a problem with the date we originally booked, but it was quickly resolved by Richard, and he was very apologetic. The engineer who came out was Adrian. He was on time, called ahead of arrival as requested, and was very polite. Did a great job. Thanks guys!
    - Zoe - The Wild Oven
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