--- title: "Magnetic Filter Install Bolton & Manchester | Conroy" description: "MagnaClean & Fernox TF1 magnetic filter installation across Bolton & Manchester. Protect your boiler, extend system life. Call 07863 789484." lang: en json-ld: | [ { "@context": "https://schema.org", "@type": "LocalBusiness", "@id": "https://conroyplumbingandheating.co.uk/#business", "name": "Conroy Plumbing & Heating", "description": "Trusted plumbing & heating engineers with 25+ years experience across Bolton, Manchester & Lancashire.", "url": "https://conroyplumbingandheating.co.uk", "telephone": "+447863789484", "email": "conroy.phr@gmail.com", "image": "https://conroyplumbingandheating.co.uk/logo.png", "logo": "https://conroyplumbingandheating.co.uk/logo.png", "priceRange": "££", "currenciesAccepted": "GBP", "paymentAccepted": "Cash, Bank Transfer, Card", "founder": { "@type": "Person", "@id": "https://conroyplumbingandheating.co.uk/#phil-conroy", "name": "Phil Conroy", "jobTitle": "Gas Safe Registered Plumbing & Heating Engineer", "hasCredential": { "@type": "EducationalOccupationalCredential", "credentialCategory": "Gas Safe Register", "identifier": "962497", "recognizedBy": { "@type": 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filter, fitting, fresh inhibitor and testing is £180-280 depending on access and filter brand." } }, { "@type": "Question", "name": "Will it void my boiler warranty if I don't fit one?", "acceptedAnswer": { "@type": "Answer", "text": "On most modern boilers, yes — manufacturers specifically require system protection (filter and inhibitor) as a warranty condition. Worth checking your specific terms." } }, { "@type": "Question", "name": "Do I need to clean it myself?", "acceptedAnswer": { "@type": "Answer", "text": "No — annual cleaning is usually done as part of your boiler service. Takes about 5 minutes." } }, { "@type": "Question", "name": "Can I fit one to an old system?", "acceptedAnswer": { "@type": "Answer", "text": "Yes — magnetic filters retrofit to any wet central heating system. Older systems benefit even more, as they tend to have higher magnetite levels." } }, { "@type": "Question", "name": "Should I get a power flush first?", "acceptedAnswer": { "@type": "Answer", "text": "If the system is heavily sludged, yes — power flushing first removes existing magnetite, then the filter prevents re-accumulation. We'll quote both if needed — see our power flushing service." } } ] }, { "@context": "https://schema.org", "@type": "Service", "name": "Magnetic Filter Installation", "description": "MagnaClean and Fernox TF1 magnetic boiler filter installation across Bolton and Manchester. 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Recommended on every new installation and after every power flush. [Get a Free Quote](/contact)[07863 789484](tel:07863789484) MagnaClean & Fernox TF1 • Boiler warranty compliant • Quick install 25+ Years Experience MagnaClean, Fernox TF1 Brands ~90 Minutes Install Time Gas Safe Registration Often Required Warranty ## Why Every Modern Boiler Needs a Magnetic Filter Central heating systems generate magnetite — a black, iron oxide sludge — as a natural by-product of corrosion inside steel radiators and cast-iron components. Magnetite circulates with the heating water, settles in the boiler heat exchanger, and clogs pumps and valves over time. Magnetic filters trap this magnetite before it reaches the boiler. A simple, in-line fitting on the return pipework, the filter contains a powerful magnet that captures iron particles as the water passes through. Cleaning is a 5-minute annual job. Most manufacturer warranties now require a magnetic filter on the system — fitting one isn't optional if you want your 10-year boiler warranty to stay valid. Worcester Bosch, Vaillant and Baxi all specify this. We fit MagnaClean Professional 2 and Fernox TF1 Sigma as standard. ## Real Work Examples ![Magnetic filter installation installed by Conroy Plumbing & Heating in Bolton](/images/work-20.jpg) ![Magnetic filter installation completed by Phil Conroy in Greater Manchester](/images/work-21.jpg) ![Magnetic filter installation carried out by our Gas Safe engineer in Lancashire](/images/work-22.jpg) ## What Happens Without a Magnetic Filter Magnetite gradually destroys the most expensive parts of your heating system. Boiler heat exchangers blocked with sludge fail prematurely. Pumps seize as iron particles clog the impeller. Diverter valves stick as sludge accumulates in the valve seat. All preventable with a £80-150 filter. - Magnetite accumulates in the boiler heat exchanger — the most expensive component to replace - Pumps seize and fail when sludge clogs the impeller bearings - Diverter valves and motorised valves stick as sludge fills the valve body - Radiators develop cold spots at the bottom as sludge settles - Annual filter cleaning takes 5 minutes — far cheaper than a £800 pump replacement ## Our Process 1 ### Survey Choose teeing point on the return pipework as close to the boiler as practical. Confirm access for annual cleaning. 2 ### Isolate & Drain System isolated, drained enough to allow cutting in to the return pipework. Floor protected. 3 ### Fit Filter Tee fittings or filter-specific isolators installed. Filter mounted, magnet inserted, sealed and pressure-tested. 4 ### Refill & Add Inhibitor System refilled, fresh inhibitor added (Sentinel X100 or Fernox F1 typical), pressurised and vented. 5 ### Test & Demonstrate System fired up, filter operation confirmed, annual cleaning procedure demonstrated. ## Why Choose Conroy ### Boiler Protection Captures magnetite before it reaches the heat exchanger — the single most effective protection against premature boiler failure. ### Warranty Compliant Required by Worcester Bosch, Vaillant, Baxi and others for full warranty cover. Fitted to manufacturer specification. ### Quick Install Typical installation takes 60-90 minutes — quick gain for big long-term benefit. ### MagnaClean & Fernox TF1 Both market-leading brands stocked. We fit MagnaClean Professional 2 and Fernox TF1 Sigma as standard. ### 5-Minute Annual Clean Self-cleaning during operation; the magnet is removed and wiped annually — usually as part of the boiler service. ### Inhibitor Top-Up Fresh chemical inhibitor added during installation — works with the filter to keep the system clean long-term. ## Technical Detail ### How They Work Heating water passes through a chamber containing a powerful neodymium magnet. Magnetite particles are pulled out of suspension and stick to the magnet, leaving the water clean. Non-magnetic dirt is also caught by a particulate filter element. ### Filter Sizing & Location Filters are sized to match the system flow rate — 22mm is standard for domestic systems. Always fitted on the return pipework (between system and boiler), as close to the boiler as practical. ### Annual Maintenance Once a year (typically during the boiler service), the filter is closed off at the isolators and the magnet is removed. Sludge is wiped away with a cloth or flushed with the filter's drain valve. Takes 5-10 minutes. ### Compatibility with Existing Systems Filters can be retrofitted to any wet central heating system. They work alongside power flushing — fitted immediately after a power flush, they capture any residual sludge and prevent re-accumulation. ### Inhibitor Chemistry Chemical inhibitor (Sentinel X100, Fernox F1, Adey MC1+) works alongside the filter — the inhibitor stops new sludge forming, the filter captures any that does. Both are needed for long-term protection. ## Frequently Asked Questions ### How much does a magnetic filter cost? ### Will it void my boiler warranty if I don't fit one? ### Do I need to clean it myself? ### Can I fit one to an old system? ### Should I get a power flush first? Looking for something else? Phil also covers [24/7 emergency plumbing](/services/emergency-plumbing), full [boiler installation](/services/boiler-installation) and [boiler repairs](/services/boiler-repairs), annual [boiler servicing](/services/boiler-servicing), [central heating installation](/services/central-heating-installation), [power flushing](/services/power-flushing), [leak detection](/services/leak-detection) and landlord [gas safety certificates (CP12)](/services/gas-safety-certificates). Browse the full list on our [services page](/services) or see [recent jobs](/our-work) and [customer reviews](/reviews). Based in Bolton, we work across [Bolton](/areas/bolton), [Manchester](/areas/manchester), [Bury](/areas/bury), [Blackburn](/areas/blackburn), [Chorley](/areas/chorley), [Wigan](/areas/wigan), [Preston](/areas/preston) and [Salford](/areas/salford). See [all areas we cover](/areas), learn more [about Phil Conroy](/about), or [get in touch for a free quote](/contact). ### Related Services - [Power Flushing](/services/power-flushing) - [Boiler Servicing](/services/boiler-servicing) - [Central Heating Repairs](/services/central-heating-repairs) - [Boiler Installation](/services/boiler-installation) ### Areas We Cover - [Bolton](/areas/bolton) - [Manchester](/areas/manchester) - [Bury](/areas/bury) - [Blackburn](/areas/blackburn) - [Darwen](/areas/darwen) - [Chorley](/areas/chorley) - [Wigan](/areas/wigan) - [Preston](/areas/preston) - [Salford](/areas/salford) - [Oldham](/areas/oldham) - [Rochdale](/areas/rochdale) - [Stockport](/areas/stockport) - [Warrington](/areas/warrington) - [Chester](/areas/chester) - [Leigh](/areas/leigh) ![Professional plumbing and heating equipment ready for installation](/images/cta-bg.jpg) ## Ready to Get This Sorted Properly? Speak directly to Phil. No call centres, no scripts — just honest advice, fair pricing, and work you can rely on. [Get a Free Quote](/contact) [Call 07863 789484](tel:07863789484) ![Conroy Plumbing & Heating](/logo.png) A trusted, family-run plumbing and heating business with over 25 years of experience serving Bolton, Manchester, and the wider Lancashire area. 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Our firm reference number is 1059442. TradeHelp is a trading style of TradeHelp Ltd, Marchwiel Centre, Bryn Lane, Wrexham Ind Est, LL13 9UT, registered in England (03712438), authorised and regulated by the Financial Conduct Authority (firm reference number 697812). TradeHelp are a credit broker, not a lender, and offer loans from a small panel of carefully selected lenders. TradeHelp do not offer financial advice and do not charge you for credit broking services. All loans are subject to status._ © 2026 Conroy Plumbing & Heating. All rights reserved. [Privacy Policy](/privacy-policy)[Cookie Policy](/cookie-policy)[Terms & Conditions](/terms-conditions)[Complaints Policy](/complaints-policy) [Call Now](tel:07863789484)[Free Quote](/contact) [WhatsApp us ](https://wa.me/447763993607?text=Hi%20Conroy%20Plumbing%20%26%20Heating%2C%20I'd%20like%20a%20quote%20please.) We use essential cookies to run this site, plus optional cookies from embedded forms and reviews. 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