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Drain Smell Diagnostics

Smelly drains can be signs that you have a damaged or clogged drain. If you drains are emitting nasty odours, acting now could help prevent further damage and get your home or business feeling fresh in no time.

Find the source of your drain smell with our professional smoke tests. These include a full smoke test of your affected drains, an hour on site to diagnose the issues, and no hidden surprises, all for just £155 + VAT.

Diagnosing drain smells

Why choose us to diagnose and fix your smelly drains?

With over 25 years in the industry, our professional team have all the skills and tools needed to route out and fix any drain smells

Our team use a combination of smoke machines and specialist CCTV systems to identify the cause of your smelly drain. These are usually caused by blocked or damaged drains and we can provide you with options to get these fixed and sorted, often there and then.

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.


★ ★ ★ ★ ★

Fast, friendly and efficient local service. Highly recommend.

Ann Jordan

★ ★ ★ ★ ★

Great service went above and beyond to try and solve our problems with broken pipes. Would definitely recommend to others.

Jan Stanley

★ ★ ★ ★ ★

Brilliant - thank you for clearing those pesky blocked drains. I am thrilled. Job well done!

Sara Oliver

★ ★ ★ ★ ★

They did an excellent job of fixing a drain blockage. Turned out to be a hair comb that had somehow gut flushed down the toilet.
No idea!
Will definitely use them again the next time I do something stupid.

Christopher Langdon

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    Our drain smell services

    Once the source of the smell is identified, we have a range of professional services to fix the root cause of the issue.

    Blocked Drains

    Blocked drains are notorious for causing bad smells. When water can't flow freely, it stagnates, creating the perfect breeding ground for bacteria and mould. This stagnant water emits an unpleasant smell that can infiltrate your entire home.

    Our drain unblocking services will help clear the cause of any nasty smells leaving your drains, and your home, fresh again.

    Drain Jetting

    Using high-pressure water, drain jetting is a very effective method of clearing blocked drains, a common cause of smelly drains. It blasts through debris and roots, leaving a clean and clear drain.

    Unlike some alternative methods, jetting doesn't use any harmful chemicals. This means there's no chance of chemicals leaching into the surrounding soil or environment.

    Once the source of any foul odours is removed, we want to keep it that way.

    Regular maintenance of your drains can prevent smells from recurring. Routine professional cleaning removes any build-up before it becomes a problem, maintaining the cleanliness and odour-free status of your drainage system.

    Have an emergency? Or looking for a maintenance or quote? Call us today on 01386 882324

    What causes drain smells?

    The decay of organic material within your drainage system is a frequent cause of bad odours. Whether it's food scraps in the kitchen, hair and soap in the bathroom, or leaves and debris in outdoor drains, organic material breaking down will always produce a foul smell.

    Faulty traps and pipes can also cause drain smells to permeate through your home or commercial building. These are supposed to hold water to block sewer gases. When they fail or dry out, these gases escape and spread a bad smell throughout your home or workplace.

    Blocked drain is the cause of this smell
    A CCTV survey to find the root cause of a drain odour

    When drain odours become too challenging to handle on your own, it's time to call in expert drain specialists like us. We come armed with advanced tools designed for accurate smell diagnostics, ensuring they pinpoint the root cause quickly and effectively.

    Our primary diagnostic tool is the smoke test. We use specialist equipment to introduce non-toxic smoke into the drainage system to identify leaks. If there's a faulty pipe or a broken trap allowing bad smells to escape, the smoke will reveal its exact location.

    If we suspect further or hidden damage to your drain, we can also run a CCTV drain survey. By inserting a small camera into your pipes, we can get a clear view of the internal workings. This method allows us to identify blockages, waste build-up, and structural issues without any guesswork.

    man who unblocks drains

    We have an amazing team to help get your drains up and running smoothly.

    Our friendly, reliable, and expert team will always be on hand to provide you with the necessary drainage solutions. Working hard to get the job done as quickly as possible with the utmost efficiency and care, so that your life can get back to normal. There is nothing more important to us than keeping you in the loop, our engineers will keep you updated sending you reminders, and checking our visit will still be convenient to your needs.

    Preventing future drain smells

    Preventing drain smells from returning is an ongoing process that requires regular maintenance. Keeping your drains clear and clean will help maintain an odour-free home and prevent any unpleasant surprises.

    One of the simplest steps is to avoid dumping grease and food particles down the sink. These materials tend to stick to the pipes and create blockages, leading to bad odours. Dispose of kitchen waste properly and use a drain strainer to catch food particles.

    Regular professional services help maintain a fresh-smelling home by preventing persistent or recurring issues. Scheduled drain cleaning can remove any potential problems before they worsen, keeping your drains clean and odour-free.

    Why choose Cotswold Drainage?

    Cotswold Drainage is CHAS-approved for health and safety, a member of Constructionline and has 25+ years of experience. You can trust us to maintain and unblock your drainage systems across commercial and domestic properties with minimal disruption, utilising the latest high-tech equipment as well as follow-up visits during and after your 6-month warranty.

    choosing Cotswold Drainage services

    Our recent blocked drains tips

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      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

      “Very quick and efficient service at a reasonable price - no need to go anywhere else.”
      “Can’t recommend Luke highly enough, went above and beyond to sort our nasty blockage on a Saturday night in awful weather. Friendly, professional, and I wouldn’t hesitate to use Cotswold drainage again!”
      “Called today and they were here well within an hour. Polite and cheerful operative did a fantastic job and kept us informed about what and why all the time. I can well understand why your reviews are so good. Would recommend without a moment's hesitation. Thank you!”
      "Cotswold Drainage were truly excellent. They were very efficient in what was a miserable job, digging out a foul drain and un-blocking it, in cold rainy weather and removing a spirit level!!! and then leaving us after ensuring that everything was left as clean and tidy and as it was before the big dig started. I would have no hesitation in recommending them for a professional and personable service.”