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Product Details

Environmentally friendly solution for drain maintenance. Contains natural bacteria (1.6 billion per ml), yielding speedy breakdown of fats, proteins and carbohydrates.

Technical Specification
Brand Barrettine
Manufacture ID KOBD001
Safety Data Sheet click here
Delivery details
Order value: Under £10 £10 & over
Express usually Next Business Day before 6pm £5 Free
Turbo usually Next Business Day before 12 noon £10 £5
Remote areas standard delivery (2-4 days) £5 Free
Order Value: Under £25 Over £25 but less than £75 £75 & Over
£10 £5 Free


Please note items delivered by our suppliers are not available for the options above. Delivery times may vary.

More about Delivery & Returns
Click & Collect details
If you are using our Click & Collect service please note the following:
  • Order online or over the phone and collect in branch from 10 minutes later.
  • Ensure you check stock is available for collection at your chosen branch.
  • Check branch opening hours to ensure you have sufficient time to collect.
  • For items not available for same day collection, place order before 8pm Mon-Sat (4pm Sun) and you can collect Next Business Day (Mon-Fri) after 3pm.
  • If we have your mobile number, we’ll send you a text when your order is ready to collect.
Reviews
Knock-out Biological Drain Treatment 1L is rated 3.9 out of 5 by 14.
Rated 5 out of 5 by from Does the job Bought this to cleared some blocked waste pipes and worked well
Date published: 2018-08-27
Rated 4 out of 5 by from Good start I’ve only used it once it worked adequately. I like the idea it’s biological and safe to use on metal.
Date published: 2018-05-27
Rated 5 out of 5 by from Drain tratment I bought this product. It is just as stated on the package. will buy again.
Date published: 2017-12-28
Rated 4 out of 5 by from Good We have a blocked shower drain. Tried other things but nothing has worked so far until this biological drain product. No cure as yet but I think we need to give it time. It smells wonderful and seems to help a little at a time. I'm going to persevere.
Date published: 2017-10-11
Rated 1 out of 5 by from Ineffective Didn't, do what I was hoping for.
Date published: 2017-08-11
Rated 5 out of 5 by from Good for the price Bought this item last week as my bathroom sink was blocked. Used Biological Drain Treatment and by the evening the drain was cleared. Highly recommend buying it, its quick and easy to use and works very fast.
Date published: 2017-07-08
Rated 1 out of 5 by from Does it work? Seemed to have no effect despite high dosage, but at least it made the drain smell better!
Date published: 2017-06-13
Rated 5 out of 5 by from Did the job good Brought this a month a go and very pleased with the result after one application.
Date published: 2017-04-11
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