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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.


Absolutely first rate and I can't speak highly enough of this company. From my initial telephone query, right the way through to the completed job, the level of customer service was outstanding. All the arrangements were handled with the utmost efficiency and any queries I had were dealt with promptly and courteously. The day the work was carried out, the weather was absolutely atrocious, but Stuart, Mark and Callum took it all in their stride. They were very professional, worked extremely hard, and despite the snow and bitter cold, remained cheerful and good humoured throughout. We honestly couldn't fault them and the same has to be said for everyone else we dealt with at Cotswold Drainage. Highly recommended and we wouldn't hesitate to use their services again in the future.
- Alison G
This service from the team was first class, the job was completed as agreed and we were pleased with the finished result.
- Malcolm Gribble
Excellent service actually on the SAME day. Thanks Adrian
- Alan Abel
Excellent service, efficient and friendly. Thank you so much.
- Anne Corstorphine
After calling with a problem with my sump pump during the wet weather, I had a workman with me the same day and everything was sorted. Great service and very professional, thank you!
- Tim Jones
We would thoroughly recommend. The team were really responsive and helpful. Came to the property quickly and resolved the problem straight away.
- Alex & Katie Saddington
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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

    Absolutely first rate and I can't speak highly enough of this company. From my initial telephone query, right the way through to the completed job, the level of customer service was outstanding. All the arrangements were handled with the utmost efficiency and any queries I had were dealt with promptly and courteously. The day the work was carried out, the weather was absolutely atrocious, but Stuart, Mark and Callum took it all in their stride. They were very professional, worked extremely hard, and despite the snow and bitter cold, remained cheerful and good humoured throughout. We honestly couldn't fault them and the same has to be said for everyone else we dealt with at Cotswold Drainage. Highly recommended and we wouldn't hesitate to use their services again in the future.
    - Alison G
    This service from the team was first class, the job was completed as agreed and we were pleased with the finished result.
    - Malcolm Gribble
    Excellent service actually on the SAME day. Thanks Adrian
    - Alan Abel
    Excellent service, efficient and friendly. Thank you so much.
    - Anne Corstorphine
    After calling with a problem with my sump pump during the wet weather, I had a workman with me the same day and everything was sorted. Great service and very professional, thank you!
    - Tim Jones
    We would thoroughly recommend. The team were really responsive and helpful. Came to the property quickly and resolved the problem straight away.
    - Alex & Katie Saddington
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