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    Septic tanks: What not to do

    1st June 2022

    More than half a million homes in the UK have a septic tank, and most homes with private drainage have a septic tank into which wastewater from loos, showers, sinks, and washing machines is discharged. Making sure you know what not to do with a septic tank is important to avoid unnecessary damage and expenses.

    Check out our list of what not to use with a septic tank, this is not a complete list as there are many other things but a basic list of everyday items. So, here are a few things you should not put in your septic tank:

    • Bleach
    • Paint
    • Disinfectants
    • Garden pesticides
    • Medicines
    • Solvents like white spirit
    • Drain cleaning and unblocking liquids that contain caustic soda
    • Cigarette butts
    • Disposable diapers
    • Sanitary pads & tampons
    • Wipes
    • Pop-off toilet brush scrubbers
    • Rubbish
    • Condoms
    • Hair
    • Plasters
    • String
    • Coffee grounds
    • Paper towels
    • anti-bacterial soaps – biodegradable soaps only!
    • latex, plastic, or metallic objects
    • hard toilet paper – soft is better for the tank
    • Dead fish
    • Kitchen grease

    There are cleaning products that have been specially designed for use with septic tanks, so keep an eye out for these as they are better for your tank. If you are unsure of any issues with your septic tank, please don’t hesitate to contact us on 01386 882324.

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    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.


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    - Paul Brindle
    We had an absolutely fantastic service from Cotswolds Drainage. They replaced a cesspool and septic tank, replacing them with a new sewage treatment works and drainage field, also installing soakaways for rainwater running off the roof. The estimating, planning, organisation, installation and clearing-up were painless and all went seamlessly. All of the installation teams were efficient, reliable and easy to work with and they were very careful about looking out for our dog. The financial estimates were clear and accurate, with no surprises. And they liaised with Building Regs as necessary. We’d thoroughly recommend Cotswolds Drainage.
    - G Lougher
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    Brilliant from start to finish. It was quick and easy to get a price, they were able to get to us within a day of accepting the quote. The gentleman who came out was friendly and answered all my questions. Would not hesitate to use them again.
    - Carrie Marshall-Couling
    - robert poole
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