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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.


The whole experience was very good. From Nicki dealing with the initial phone call. To delivering a very fast & efficient turn around for an emergency job. Very competitive rates and very pleased with Adrian's attitude on arrival and eagerness to complete the job and help me out.
- Ciaran Mathias
Excellent Not only the most cost-effective quote for a new septic tank, but the company also went to great length to solve a related problem, not of their making. Cheerfulness, expertise and willingness to help turned a potential disaster into a roaring success. Cannot recommend too highly.
- Rafferty W
Fantastic service. Adrian did a brilliant job
- Jef Scrivener
Excellent service and advice given by Andy who came out, with no call out charge, to diagnose an issue and explain that it was the responsibility of the water board, so putting my mind to rest. Many thanks for your patient and friendly approach.
- Kathleen Dicks
Turned up on time. Very pleasant guy. Carried out the maintenance and service very professionally.
- Philip Taylor
Excellent reliable service, the vans come fully prepared for all drainage jobs, at a reasonable cost. Have used this company several times now.
- Adrian Prosser
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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

    The whole experience was very good. From Nicki dealing with the initial phone call. To delivering a very fast & efficient turn around for an emergency job. Very competitive rates and very pleased with Adrian's attitude on arrival and eagerness to complete the job and help me out.
    - Ciaran Mathias
    Excellent Not only the most cost-effective quote for a new septic tank, but the company also went to great length to solve a related problem, not of their making. Cheerfulness, expertise and willingness to help turned a potential disaster into a roaring success. Cannot recommend too highly.
    - Rafferty W
    Fantastic service. Adrian did a brilliant job
    - Jef Scrivener
    Excellent service and advice given by Andy who came out, with no call out charge, to diagnose an issue and explain that it was the responsibility of the water board, so putting my mind to rest. Many thanks for your patient and friendly approach.
    - Kathleen Dicks
    Turned up on time. Very pleasant guy. Carried out the maintenance and service very professionally.
    - Philip Taylor
    Excellent reliable service, the vans come fully prepared for all drainage jobs, at a reasonable cost. Have used this company several times now.
    - Adrian Prosser
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