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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.


Cotswold drainage did a great job jetting our sewer pipe and putting in a new manhole cover. Adrian and Keith on site ,Sara and Chris in the office sorting it out for us were great.
- Eddie Ayliffe
Amazing service , quick call out and rectified a tricky blockage. 5 ⭐️. Recommended to others already. Thank you
- Michelle
Excellent service from start to finish
- Ryan THOMAS
We are unfortunately in a position, due to changes in the laws in recent years whereby our original Victorian septic system does not meet current regulations. We also have an issue where the pipe that drains the water from our current system runs under the road onto a neighbouring property. As you can imagine this has caused real issues. We cannot speak highly enough of Stuart and his colleagues at Cotswold Drainage. They have been fantastic, visiting site, talking us through various issues and generally holding our hand through a very stressful time. We are looking forward to having the new system installed in the Spring. Ann & Gerry Hanagarth
- Gerry Hanagarth
Cotswold Drainage are super efficient and extremely helpful.
- Arabella Kiszely
Fantastic service. Fast and efficient!
- Andrew Seale
Cotswold Drainage came out to clear a blocked drainage pipe in our shop and once again were quick to respond and professional throughout the duration of their work. These guys are our go-to when jobs are too big for the plumber. Very competitively priced too!
- John Geoghegan
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    Have an emergency? Or looking for a maintenance or quote?

    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

    Cotswold drainage did a great job jetting our sewer pipe and putting in a new manhole cover. Adrian and Keith on site ,Sara and Chris in the office sorting it out for us were great.
    - Eddie Ayliffe
    Amazing service , quick call out and rectified a tricky blockage. 5 ⭐️. Recommended to others already. Thank you
    - Michelle
    Excellent service from start to finish
    - Ryan THOMAS
    We are unfortunately in a position, due to changes in the laws in recent years whereby our original Victorian septic system does not meet current regulations. We also have an issue where the pipe that drains the water from our current system runs under the road onto a neighbouring property. As you can imagine this has caused real issues. We cannot speak highly enough of Stuart and his colleagues at Cotswold Drainage. They have been fantastic, visiting site, talking us through various issues and generally holding our hand through a very stressful time. We are looking forward to having the new system installed in the Spring. Ann & Gerry Hanagarth
    - Gerry Hanagarth
    Cotswold Drainage are super efficient and extremely helpful.
    - Arabella Kiszely
    Fantastic service. Fast and efficient!
    - Andrew Seale
    Cotswold Drainage came out to clear a blocked drainage pipe in our shop and once again were quick to respond and professional throughout the duration of their work. These guys are our go-to when jobs are too big for the plumber. Very competitively priced too!
    - John Geoghegan
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