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    Septic Tank Emptying: How Often Does a Septic Tank Need to Be Emptied?

    30th August 2023

    One of the most common questions we are asked is "How often should my septic tank be emptied". So let's go through septic tank emptying, from the key signs to look out for, to how often this should be done. We know this may not be the most glamorous of topics but the emptying and ongoing maintenance of your septic tank is important to ensure its longevity.

    What is a Septic Tank?

    Before delving into the emptying and maintenance care of your septic tank, let’s look at what exactly they are. Septic tank drainage systems are used to treat wastewater collected from your drains and pipe network. They are typically located underground and are used to keep your home or commercial property clean and free from any water pollutants.

    They work by collecting the water into a tank, allowing the sludge and solid particles to settle at the bottom whilst the wastewater is further treated and released into the soil.

    How Often Should a Septic Tank Be Emptied?

    The frequency of your septic tank emptying will depend on several factors, including its size and average use. For standard-sized tanks used in the home for domestic purposes, the 3-to-5-year mark should be sufficient. However, with larger tanks used in commercial, industrial and agricultural spaces, this should be emptied more often.

    Typically speaking once every year is recommended. Regular emptying will prevent your septic tank system from backing up or at worst failing, which can lead to costly repairs.

    Septic Tank Emptying: Signs That Your Septic Tank Needs Emptying

    1. Pooling Water

    If you notice water beginning to pool around your septic tank, this typically means something isn’t quite right. This is likely the cause of excess liquid overflowing from your tanks and only emptying it will remedy this issue.

    2. Bad Smells & Odours

    One of the more unpleasant indicators is a foul and unpleasant odour around your septic tank system. The primary function of a septic tank is to collect wastewater, be it from your sewage system, shower, toilet, or dishwasher. As this waste left behind begins to build up, it creates a bad smell that only worsens over time. If you happen to be experiencing this, it may be time to empty it.

    3. Slow Drains

    Are you noticing that water is taking longer than usual to drain? This could be the result of a full septic tank. When your septic tank is nearing capacity, it won’t be able to handle the additional wastewater to its full potential. As a result, you’ll likely notice slow drains all throughout your home.

    Why Wait? Contact The Septic Tank Experts Today

    When it comes to emptying a septic tank, don’t wait until it’s too late. As with most things, timing is key and leaving this until the last minute isn’t the best course of action to take. It’s always advised to lean on the help and expertise of septic tank specialists who can guarantee a professional and clean finish. For more information on our septic tank emptying service, get in touch with a member of our expert team today either by calling 01386 882324 or by using our septic tank emptying booking form


    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.


    From the telephonist to the operative, Cotswold Drainage was helpful, flexible, and professional in its work. It arrived on time and went out of its way to show excellent camera footage of the drains.
    - Geoffrey
    Great service. Requested a treatment plant survey for a house we were purchasing before exchanging contracts. They liaised with the seller direct to arrange a convenient date and time. Report was emailed to us the next day. They replied to queries on the report very promptly and also other queries we had with the system and how it worked. Quick service throughout, would definitely recommend.
    - Stuart Ludlow
    Excellent competitively priced service to empty our bio system. They also responded quickly to a slight issue we had post emptying and soon sorted it.
    - Deacon Lucye
    Great friendly service from speaking to Nicky on Wednesday and the drains being cleared and disinfectant on Thursday. I highly recommend their service. Nothing smells better than not smelling dirty blocked drains
    - Carol Brown
    Really helpful and accommodating. Found me a time at short notice. Luke was lovely and sorted everything quickly and well.
    - Hen H-J
    Excellent service. Easy to book and communicate with.
    - Matthew Wilkinson
    As always, we appreciate the first-class service from the entire team. Highly recommend Cotswold Drainage as my go-to drainage solutions business. Thank You.
    - Gary Thomas
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