10 Best Drain Unblockers in The UK

Last updated on 31/05/2025

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Best Choice

9.8

Exceptional

Spear & Jackson

Spear Jackson Heavy Duty Sink and Drain Unblocker Gel - Powerful Formula- Indoor and Outdoor, 5 l (Pack of 1)

Why We Love It

Effective on tough blockages.
Safe for all pipes.
Experienced, reputable brand.

Main Highlights

SPEAR & JACKSON CLEANING PRODUCTS: Since 1760 Spear and Jackson has been selling hand, garden, contractors, agricultural, landscaping and professional tools from its base in the city of Sheffield. Their range of cleaning products are made to target tough stains, grease, grim and fat. Their Heavy Duty Outdoor Drain Unblocker Gel is designed to clear any deposits that are blocking your sink, leaving it draining smoothly
SINK UNBLOCKER LIQUID GEL: Spear and Jackson's Heavy Duty Sink And Drain Unblocker comes in gel form and is designed to dissolve the fat, food, hair or soap residue build up that's blocking your sink. Their heavy duty sink and drain unblocker gel will instantly clear and dissolve the unwanted blockage, and with the sink freshener element of the gel, your sink will be look and smell brand new
BATHROOM & KITCHEN SINK UNBLOCKER: With no drain snake require, this product really couldn't be any easier to use. The gel will dissolve any build up that is causing a blockage in your sink or drain in 3 hours. Ideal for the kitchen or bathroom sink, however this Heavy Duty Sink & Drain Unblocker works on exterior drains just as well. In comparison to other drain cleaners and unblockers on the market, this product has a powerful formulation that achieves results in rapid speed
BATHROOM CLEANING PRODUCTS: Spear and Jackson's fast acting, powerful and effective sink and drain unblocker liquid is perfectly safe to use on all pipe types. For the best results, pour the heavy duty drain unblocker down the plughole, leave for a minimum of 3 hours (preferably overnight) and finish off by flushing the drain with hot water for at least 2 minutes to completely free any blockages - it's really that easy!
SPEAR & JACKSON: With over 250 years experience and continuous innovation, Spear and Jackson have built an enviable reputation with their market leading products that offer high quality performance tools to suit a wide range of needs. Whether you're looking to unblock your sink drain or a concentrated mould, algae and moss spray then shop Spear and Jackson range of versatile, effective and long lasting cleaning products

Kilrock SLAM - Sink and Plughole Bathroom Drain Unblocker - Multi-Pack x12 - Dissolves Grease, Fat & Food - For Smelly Drains

Why We Love It

Powerful for severe blockages.
No mess, no fuss.
Convenient, fast-acting formula.

Main Highlights

✓ KILROCK SLAM BATHROOM SINK AND PLUGHOLE UN-BLOCKER - One shot unblocks your Bathroom plughole with ease. 12x Shots
✓ EFFICIENT: Kilrock Slam Bathroom Plughole Unblocker rapidly eliminates severe bathroom obstructions without creating any mess or troublesome odors. Removes and dissolves hair, grease, and soap scum from drains
✓ EASY TO USE - Simply pour the contents of the sachet down the bathroom plughole, pour a litre of very hot water down and leave it for 3 minutes to work it's magic
✓ ORIGINAL KILROCK FORMULA: This powerful formula effectively tackles stubborn bathroom blockages with no mess and no fuss
✓ MADE IN THE U.K. From our factory in Chesham, Buckinghamshire, we design, formulate, blend, fill, pack, sell and distribute a full range of specialist household problem-solving and cleaning products

2 x Liquid Drain Unblocker 1L - Unblocks Your Drain Within 30 Minutes

Why We Love It

Updated packaging, same trusted contents.
Previous name, renewed identity.
Unblocks with assured efficiency.

Main Highlights

*Packaging May Vary* HG have updated their product labels, the contents remain exactly the same. The name has changed on selected product lines
Old Name: HG Liquid Drain Unblocker
New Name: HG Drain and Plug Unblocker

5 Litre Heavy Duty Sink & Drain Unblocker Strong Cleaning Liquid Plug Hole Toilet Cleaner Tool For Home, Office, Garage & Shops (1 x 5 Litre)

20% Off

Why We Love It

Unclogs sinks rapidly under 5 minutes.
Super-strength formula clears stubborn blockages.
Safely maintains all types of drains.

Main Highlights

SINK & DRAIN UNBLOCKER: However much you try, sometimes food, hair or other blockages might fall down your sink or drains. Luckily, our sink and drain unblocker will help you get those clogs shifted. Soon you’ll be able to take a shower without it filling up with water or wash up in your kitchen sink without the dirty water getting stuck. Our Sink and Drain unblocker is the fast and effective way to unclog your sinks and drains with one dose. Gets to work really fast in under 5 minutes.
POWERFUL FORMULA: Power through blockages in your drain with our super-strength drain unblocker solution. It's a home essential and can be used on sinks, showers, and outdoor drains. It powers through to the source of the blockage to resolve the issue and give you free running water again. Use regularly to ensure pipes and drains remain problem free.
MULTI USE: Protect your sinks and drains by using this drain unblocker on a regular basis. Out solution is safe for use on all pipes, its perfect for the home, office, workplace, shops and canteens.
SIMPLE TO USE: Add 1 Litre of product to the affected sink or drain and allow the solution to work for at least 5 minutes. For best results, leave for up to 30 minutes and then flush through with hot water. Simple select the amount required from the menu above.

Buster Bathroom Drain Unblocker 300ml, Pack of 3 – Sink Unblocker Removes Hair & Sludge in Showers, Baths & Sinks. Fast-Acting Shower Drain Unblocker Clears Blockages & Slow-Draining Water

Free Shipping

Why We Love It

Clears hair and sludge swiftly.
Saves showers, baths, and basins.
Fast-acting, efficient blockage solution.

Main Highlights

BATHROOM SINK UNBLOCKER - Buster Bathroom Plughole Unblocker is the one-shot drain unblocker specially designed to blast away hair and soap scum in bathroom drains fast
TARGETS HAIR & SLUDGE - Buster clears bathroom plugholes from the build-up of hair, soap scum and sludge; these are the common plughole nasties that, if not treated regularly, cause the dreaded bathroom plughole blockage
FOR SHOWERS, BATHS & BASINS - Buster Bathroom Plughole Unblocker is specially formulated to tackle the causes of blockages inside your bathroom pipes - It’s suitable for showers, baths, sink plugholes and is safe to use on septic systems
STOPS SLOW DRAINING WATER & BLOCKAGES - Whether it’s a full blockage or slow draining water, Buster’s fast-acting formula gets to work in 15 minutes (for best results leave overnight), dissolving hair and clearing sludge to keep water flowing freely
YOUR PLUGHOLE EXPERTS - For over 30 years we’ve worked obsessively to make plughole care products that are effective and simply get the job done, from clearing and preventing blockages to cleaning and sanitising

Zep Commercial Unblocker Heat Drain Liquid

8% OffFree Shipping

Why We Love It

Melts blockages for easy drain.
Battles grease, fat effortlessly.
Safe for plastic components.

Main Highlights

Heavy duty formulations melts tough blockages
destroys grease, fat &amp
food build-up effortlessly
this professional-strength formula is safe for Plastic pimples
Destroys grease, fat & food build-up effortlessly
This professional-strength formula is safe for Plastic pimples

Mr Muscle Drain Unblocker, Sink & Drain Cleaner, Fast Acting Heavy Duty Gel Formula, Dissolves Clogs, Works 3x Better Than Bleach, Safe for All Pipes, Duo Pack, (2 x 1L)

Free Shipping

Why We Love It

Powerfully tackles tough clogs.
Quick-action, efficient unblocking.
Safe for all pipes.

Main Highlights

Sink power unblocker to destroy the toughest clogs in your drain
Blocked drain cleaner for dissolving clogs caused by debris in sinks, plugholes and pipes
3x more effective than bleach as a pipe unblocker based on hair removal in laboratory testing
Cuts through standing water to unblock plugholes
Mr Muscle drain unblocker is safe for use on all types of pipe

HG Kitchen Drain & Plug Unblocker, Natural Drain Unblocker, Heavy Duty Drain Cleaner, Kitchen Sink Unblocker & Kitchen Cleaner for Pipes, Septic Tank Safe - 1 Litre

Free Shipping

Why We Love It

Effective for persistent blockages.
Eco-friendly and biodegradable ingredients.
Prevents future blockages.

Main Highlights

HG Drain Unblocker for kitchen sinks: A fast acting drain unblocker and kitchen sink cleaner. Clears the pipes quickly and easily; ideal for persistent blockages caused by fat, oil and food remnants
Eco conscious formula: The kitchen sink unblocker is made using natural ingredients, including enzymes and microbes, making this cleaner biodegradable and safe for any kitchen drain or septic tank
Quick and easy plughole unblocker: High strength blockage remover gel which gets to work eating away at the blockage. Try this first before calling a plumber! Gentle on sinks, pipes and traps
Easy to use drain cleaner fluid: Can also be used as a sink drain cleaner and de-odouriser. Enhances the bacteria culture of septic tanks and has a preventative effect to help avoid future blockages
Includes: 1 x HG Plughole Unblocker, 1L. Discover the full range of HG professional household cleaning products, with HG Mould Remover, toilet unblocker, shower drain unblocker and all surface cleaner

HG Drain and Plug Hair Unblocker, Removes Hair from Showers, Baths, Sinks & Plug Holes, Unblocks Blocked Bathroom Pipes & Drains Quickly & Easily (200 ml + 250 ml) - 667045106

10% OffFree Shipping

Why We Love It

Effective two-step formula solution.
Quick and convenient application.
Universal compatibility with drains.

Main Highlights

HG hair unblocker is the perfect solution to help unblock your drains with its 2 step formula
Removing blockages caused by hair
For quick and effective results
Ready to use and convenient to apply
Suitable for all types of drains

5PCS Drain Cleaner Tool Set, Outdoor & Plug Unblocker, Reusable for Bathroom, Shower & Kitchen

Free Shipping

Why We Love It

Sturdy and reusable tool.
Easily removes stubborn clogs.
No toxic chemicals needed.

Main Highlights

[Package Content]:You will get 1pc 155cm double-ended nylon pipe cleaning brush, 1pc 45cm sink unclogging brush, a 20cm sink unclogging brush, 2pcs 50cm bathtub basin cleaning hair hook. dust and dirt,sufficient to meet your daily needs.
[Premium Material]:The plug unblocker tool are made of sturdy stainless steel and nylon bristles,flexible and bendable,and the bristles are not easy to fall off;resistant to rust and reusable,can help you easily clean your hair and dirt.
[Multifunctional drain unblocker tools]:Our drain cleaner tools remove hair, soap, food and all the build up of gunk easily and effectively without using toxic chemicals, avoiding environmental pollution,easy to clean the pipe clogging in-depth
[Easy to Use]:Our product is designed to be easily used and can accommodate a variety of hoses, especially those with curved pipes like U-shaped tubes. To achieve a clean interior, simply insert the dual-ended pipe cleaner into the pipe and gently move it back and forth.
[Wide Application]: which can be bent to clean deeply and solve the clogging of washbasins, sinks, floor drains bathtub troughs and other hair, dust and dirt,sufficient to meet your daily needs. toilet and other places can easily unclog the hair and other obstacles in the pipeline. With this drain hair remover, you no longer need to call an expensive pipe cleaner!

9.0

Superb

We scanned 1565 products

We reviewed these offers relevant to the Drain Unblockers within online retailers such as Amazon, eBay and other local retailers, ensuring we covered all major brands and models. The products we selected come from trusted brands like Spear & Jackson, Kilrock, HG, STORM TRADING GROUP, Buster, Zep, Mr Muscle, CKCSHI, all of which have a reputation for consistently delivering high-quality products that users love and innovative approaches for function & design.

For the best Drain Unblockers in the market, we considered we took a deep dive into 7826 online reviews , focusing on elements like user satisfaction, performance in real-world conditions, and long-term reliability. Our ranking also evaluates each review’s relevancy, authenticity, up-to-dateness and depth so that the comparison is more sound.

We concluded that:

The clear winner of our analysis is Spear Jackson Heavy Duty Sink and Drain Unblocker Gel - Powerful Formula- Indoor and Outdoor, 5 l (Pack of 1). We love many things about this product by Spear & Jackson. What sets it apart from the competition is Effective on tough blockages, Safe for all pipes, Experienced, reputable brand.
The best value product for most shoppers and where user satisfaction is continuously the highest is Kilrock SLAM - Sink and Plughole Bathroom Drain Unblocker - Multi-Pack x12 - Dissolves Grease, Fat & Food - For Smelly Drains by Kilrock based on online reviews by bloggers, experts and online shoppers.
The biggest bargain at the moment for Drain Unblockers and the best cost-to-value ratio is 5 Litre Heavy Duty Sink & Drain Unblocker Strong Cleaning Liquid Plug Hole Toilet Cleaner Tool For Home, Office, Garage & Shops (1 x 5 Litre)at STORM TRADING GROUP with a 20% discount.
Our list of the best Drain Unblockers is updated regularly to reflect new releases and changes in product availability, so be sure to check back often for the latest rankings and discounts.

10 Best Drain Unblockers in The UK

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We scanned 1565 products

We concluded that: