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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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    Communication with engineer was perfect. The job didn't take long, and the engineer was polite, knowledgeable and efficient. Well done everyone, will definitely recommend :)
    - Joanne Wolseley-Charles
    Really efficient, polite and really easy to do business with. Would highly recommend.
    - Will Garrity
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    - Darren Ayley
    We've been using Cotswold Drainage for a few years. They are great to deal with and have always sorted issues out promptly with our septic tank. Shout out to Dave Streeter for looking after us so well!
    - Nigel Carter
    Great service - really hard ground and tough conditions and the guys came back the following Monday to complete the job at no extra charge. Thankyou
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