10 Best Outdoor Drain Cleaners And Unblockers in The UK

Last updated on 02/05/2025

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Best Choice

9.8

Exceptional

Spear & Jackson

Spear & Jackson - Heavy Duty Sink And Drain Unblocker Gel - 2 x 5 Litres - Clears Blocked Drains

Why We Love It

Effective on tough blockages.
Easy to use gel formula.
Trusted brand with heritage.

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

One Chem Professional Heavy Duty Drain Unblocker 2 x 5 Litres, Clears Grease, Fat, Food Deposits, Indoor and Outdoor Use

Why We Love It

Powerful and effective formula.
Reduces build-ups and blockages.
Easy and safe usage.

Main Highlights

Powerful Formula: One Chem Heavy Duty Indoor and Outdoor Drain Unblocker is a specially formulated liquid that clears grease, fat, and food deposits in drains, gulleys, and waste outlet pipes.
Maintenance: This liquid also helps maintain sinks and drains to reduce build-ups and blockages.
Usage Instructions: Wear gloves, place bottle on a flat surface, push down on the cap and turn anti-clockwise, pour 500ml of liquid down the drain taking care not to splash in eyes, allow to dwell for a minimum of 3 hours but preferably overnight, then flush with plenty of water.
Effective Dwell Time: For best results, allow the liquid to dwell for as long as possible, with a minimum of 3 hours but preferably overnight.

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

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.

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

Professional Drain Unblocker with Claw, Reusable Flexible Plumbing Drain Snake, Sink Unblocker and Drain Unblocker Tool for Sewer, Bathroom Drainage,Kitchen Sinks

Free Shipping

Why We Love It

Effortlessly clears stubborn clogs.
Durable and eco-friendly design.
Versatile for multiple drain types.

Main Highlights

[DRAIN UNBLOCKER RECOMMENDED FOR] The WEIMEIH drain auger, thanks to the end equipped with a claw, is recommended for freeing bathroom and kitchen drains from solid obstructions. Recommended for kitchen sinks and drains, it is also suitable for sinks, showers, bathtubs and bathroom drains.
[EASY TO OPERATE] Just insert, rotate and easily remove obstacles. Drain Snake is suitable for most bathroom drainage equipment without removing the drain plug.The professional drain auger can be used not only in the case of blockages but also for maintenance purposes for your drains
[MULTIFUNCTIONAL SINK UNBLOCKER TOOL] Drain unblocker tools are suitable for kitchen sinks, washbasins, bathtubs, floor drains and other places. Easily help you clean up the sewer and solve the blockage problem. With this drain hair remover, you no longer need to call an expensive pipe cleaner
[ENVIRONMENTAL PROTECTION] The sink unblocker is made of stainless steel and PP plastic, which is safe, durable, recyclable and flexible. The WEIMEIH probe is an ecological solution for cleaning drains and allows you not to use chemicals.Snake drain cleaner can clean blocked drain pipes more effectively. Discard hazardous chemicals
[DURABILITY] The WEIMEIH sink unblocker is made of a high-strength ABS roller jacket with long durability. Spiral is made of high quality carbon steel and can be easily stored in a bucket. This makes it cleaner than other sink unblocker

Strong Heavy Duty Industrial Sink & Drain Unblocker Cuts Through Standing Water Fast Effect 5 Litre Cleaner (1 x 5 Litre)

Why We Love It

Unclogs water in minutes.
Effective on various drains.
Safe for all pipes.

Main Highlights

5 Litre heavy duty industrial sink and drain unblocker is designed to cut through standing water that has been caused due to food being trapped in drain pipes or either a build up of hair stuck in showers. It effectively unclogs your sinks in just one dose and gets to work in less than 5 minutes so you can have running water again.
The powerful formula cuts through standing water, clogged toilets and sinks, this is a essential cleaning product used in most homes, offices, workplaces, canteens and shops.
Sink and drain unblocker can be used for sinks, showers, toilets, drains, outdoor drains it powers through to the source of the blockage to resolve the issue and give you free running water again.
We recommend you use this on a regular basis to ensure pipes and drains remain problem free, our solution is safe for use on all pipes and is very easy to use simply 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.

Cillit Bang 3-in-1 Power Cleaner Odour Stop Drain Unblocker Gel, Drain Cleaner For Kitchen Sink Drains, Bathroom Showers, Baths & Basins (Pack of 5)

Free Shipping

Why We Love It

Works in just 5 minutes.
Eliminates odour-causing bacteria.
Recyclable bottle packaging.

Main Highlights

WORKS IN 5 MINUTES: Cillit Bang 3-in-1 Power Cleaner Odour Stop Drain Unblocker Gel has a powerful formula that works in as little as 5 minutes; It specifically build up of sludge, dirt or other materials and breaks them up, keeping your pipes clean and water flowing freely
CLEANS AND FRESHENS: Cillit Bang's odour-eliminating gel targets odour-causing bacteria that live in your kitchen sink drains, bathroom showers, baths and basins
WORKS EVEN IN STANDING WATER: Cillit Bang 3-in-1 Drain Unblocker Gel unblocks, freshens and deep cleans your drains, even in standing water
SAFE FOR ALL PIPES: Our powerful drain unblocker gel only gets to work on nasty blockages building up in your drains and leave your pipes cleaner and fresher than before
BOTTLE CAN BE RECYCLED

Gardian Drain Unblocker - 500 ml High Strength Drain Cleaner to Effectively Dissolve Clogs on Sinks, Showers and Drains - Safe, Non-Corrosive, Easy-to-Use Drain and Sink Unblocker Liquid

Free Shipping

Why We Love It

Eliminates blockages quickly.
Safe and non-corrosive.
Easy-to-use solution.

Main Highlights

High-Strength, Heavy Duty Drain Cleaner: Gardian Sink and Shower Drain Unblocker is designed to quickly and effectively eliminate blockages in sinks, showers, and drains. The potent formula of this kitchen sink unblocker ensures hassle-free maintenance of your plumbing system.
Safe and Non-Corrosive: This bathroom drain unblocker liquid is both safe and non-corrosive, making it perfect for regular use. This shower unblocker effectively dissolves clogs caused by grease, grime, sludge, and hair without damaging your pipes.
Easy-to-Use Solution: Unblock sink and drain in a simple cleaning process with our kitchen drain unblocker. Just pour, leave, and let the powerful formula do the work. This bathroom sink unblocker keeps your drains flowing smoothly.
Fast-Acting Formula: Experience swift results with the rapid-action formulation of our pipe unblocker. This indoor and outdoor drain unblocker saves you time and effort while ensuring your drains remain clear and obstruction-free.
Versatile and Ready-to-Use: Perfect to unclog variety of blockages, this heavy duty drain unblocker is ready to use straight out of the ergonomically capped bottle. This versatile shower drain cleaner handles all types of clogs effectively.

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

8.8

Excellent

We scanned 286 products

We reviewed these offers relevant to the Outdoor Drain Cleaners And 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, One Chem, STORM TRADING GROUP, Zep, WEIMEIH, Pluto Packaging, Cillit Bang, Gardian, Mr Muscle, all of which have a reputation for consistently delivering high-quality products that users love and innovative approaches for function & design.

For the best Outdoor Drain Cleaners And Unblockers in the market, we considered we took a deep dive into 1431 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 - 2 x 5 Litres - Clears Blocked Drains. We love many things about this product by Spear & Jackson. What sets it apart from the competition is Effective on tough blockages. , Easy to use gel formula. , Trusted brand with heritage. .
The best value product for most shoppers and where user satisfaction is continuously the highest is One Chem Professional Heavy Duty Drain Unblocker 2 x 5 Litres, Clears Grease, Fat, Food Deposits, Indoor and Outdoor Use by One Chem based on online reviews by bloggers, experts and online shoppers.
The biggest bargain at the moment for Outdoor Drain Cleaners And 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 Outdoor Drain Cleaners And 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 Outdoor Drain Cleaners And Unblockers in The UK

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We scanned 286 products

We concluded that: