Skip to main content

In this article

    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.

    Some of our services include:


    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.


    Like many others have said, the customer service was outstanding right from the first call. A huge thank you to Adrian for doing a fantastic job clearing our drain and giving us peace of mind that the blockage was fully resolved. Highly recommend.
    - Rachael B
    Fantastic service - highly recommended. Great communication. Fast, tidy and effective solution.
    - Sara Fletcher
    Cotswold Drainage provided very good service. They were prompt friendly and efficient. Thank you.
    - Pam Foley
    - Alan Hughes
    Excellent service both at the office when booking and on site during the disposal; very happy with the outcome and price Would certainly recommend Cotswold Drainage to any prospective user
    - Tony Stock
    Great company, very helpful, very efficient
    - Barry Williams
    Great service - thank you
    - Nigel Arscott
      Please let us know your name.
      Please let us know your email address.
      Invalid Input
      Invalid Input
      Please let us know your message.

      Related Articles

      How much does it cost to empty a septic tank?

      How to check if your septic tank needs emptying

      What is the process of emptying a septic tank?