Is Black Sludge Destroying Your Boiler?
Restore Your Heating Efficiency with a Magnacleanse Flush
If you are experiencing any of the following issues, your central heating system is likely choking on magnetite (black iron rusty sludge):
- Cold spots at the bottom of your radiators
- Loud, clanking “kettle” noises coming from your boiler
- Spitting black or brown water when you bleed your radiators
- Spiking gas bills because your home takes forever to heat up
This abrasive black sludge is formed when the inside of your steel radiators rusts away. If left untreated, it acts like liquid sandpaper. It grinds down pump bearings, blocks narrow heat exchangers, and will eventually kill your boiler entirely, leading to a massive replacement bill. You need a Magnacleanse flush.
Don’t wait for a total breakdown. Get your system flushed and protected today.
Why a Standard Chemical Flush Isn’t Enough
A basic drain-down or standard chemical flush might work for a brand-new or lightly soiled system. But if your pipes are heavily loaded with thick, magnetic iron sludge, standard water flow simply lacks the power to push it out.
Gravity leaves the heaviest, most damaging debris sitting firmly at the bottom of your radiators, ready to ruin your boiler the moment you turn it back on.
You need a process that actually rips the sludge out.
The Magnacleanse Solution: Seeing is Believing
At iWarm, we deploy the industry-leading Magnacleanse treatment. This highly effective, targeted mechanical and chemical cleaning process guarantees results you can physically see.
Here is exactly how we restore your heating to peak performance:
- External Magnetic Filtration: We plumb a powerful, purpose-built magnetic filter directly into your heating circuit.
- Chemical Agitation: We dose your system with heavy-duty chemical cleansers and run the boiler up to temperature to break down hardened, stubborn deposits.
- Targeted Sludge Removal: As the water circulates, we systematically agitate each individual radiator with specialised tools. The sludge is lifted into the flow and permanently trapped by our external magnets.
- Visual Proof: We don’t just tell you it’s clean, we’re able to show you the solid iron sludge pulled out of your system, proving exactly why your heating was struggling.
Total System Protection
We don’t just clean your system and walk away. Once the Magnacleanse process is complete and your system water is running crystal clear, we take the final, most important step: Prevention.
We dose your freshly cleaned system with a premium central heating inhibitor. This specialised chemical coats the internal metals of your radiators and pipework, neutralising the reaction that creates magnetite in the first place.
The result? A system that stays clean, runs efficiently, costs less to operate, and is protected for years to come.
Local, Professional Service You Can Trust
Operating out of Grimsby, iWarm provides professional Magnacleanse treatments across Cleethorpes, Immingham, Scunthorpe, Louth, Caistor, Brigg, and all surrounding areas of North East Lincolnshire.
Stop paying high energy bills for half-warm radiators. Stop risking a complete boiler failure.
Contact us to book your Magnacleanse flush today!
Frequently Asked Questions
How long does a Magnacleanse flush take?
Every central heating system is different. Several factors effect the time required to perform a full Magnacleanse flush, including how many radiators in the property / how easily we can connect our Magnacleanse system to your heating system and how much magnetite gets extracted. For a fully Magnacleanse treatment including hot chemical flush, another cold water flush, then finally refilling / bleeding the system and dosing with inhibitor - we're probably looking around 6 hours.
In which locations are you available?
Whilst we're based in North East Lincolnshire, we have customers across the whole of Lincolnshire. Over the years, we've helped people keep their hot water running in Scunthorpe / Brigg / Barton-upon-Humber / Brigg / Immingham / Grimsby / Cleethorpes / Binbrook / Market Rasen and Louth.
How is a Magnacleanse different to my existing system filter?
A Magnaclease is a giant version of a magnetic system filter, but due to it's extreme size and flow rates, it allows the engineer to agitate the most metallic "sludge" from your radiators / pipework as possible.
Magnetic System Filters: The Ultimate Defence for Your Boiler
Expert Magnacleanse Flush | Remove Radiator Sludge
EXCELLENT
Based on 8 reviews
Posted on Google
James6 October 2026Trustindex verifies that the original source of the review is Google.
Great service, quick booking and visit. Sent the certs same day. Recommended.Posted on Google
Samara6 July 2026Trustindex verifies that the original source of the review is Google.
Great service, reasonable pricing, got the job done extremely quick, nice lad, very professional and cleaned up after himself, absolutely would recommendPosted on Google
Dainora27 May 2026Trustindex verifies that the original source of the review is Google.
I had a boiler issue, stopped working. He arrived on the same day and ensured that the boiler works while we wait for parts. Kept me updated while parts were coming and asked if the boiler is still working. Always kept the area clean and explained what was the issue. Great job! Definitely recommend.Posted on Google
Adrian18 May 2026Trustindex verifies that the original source of the review is Google.
Fantastic service from Guy, who travelled out to Market Rasen on a Sunday when our boiler stopped working. He was super professional, quick to sort the issue, and great value for money. With kids in the house, getting the heating and hot water back on meant everything, definitely one of those luxuries you take for granted until they’re gone. Really appreciate the effort and would highly recommend.Posted on Google
Annette29 March 2026Trustindex verifies that the original source of the review is Google.
Guy came to us today which was a wet and cold Sunday afternoon as my Elderly Mother was without heating. After initial contact a time was agreed and Guy arrived on the dot.... He was very good and explained everything he was doing ensuring we understood what was happening. Guy was very clean and there was not a single bit of mess left behind. He made sure we were happy with the work and didnt leave until he was 100% sure the problem was fixed. There was no hard sell with Guy at all he explained a few options for us in the future. Would HIGHLY reccommend Guy and have saved his details for future use. 5☆☆☆☆☆Posted on Google
David20 March 2026Trustindex verifies that the original source of the review is Google.
Thank you very much for servicing my boiler and balancing my radiators. All working well again. Highly recommended.Posted on Google
James10 March 2026Trustindex verifies that the original source of the review is Google.
Was polite and tidy. Fixed an issue with our central heating and fitted a new bathroom radiator. Thanks
Questions? Contact us
Serving customers in Grimsby, Cleethorpes, Immingham, Louth, Brigg, Caistor, Market Rasen, Barton upon Humber and Scunthorpe.
