{"title":"Fernox","description":"","products":[{"product_id":"fernox-protector-f1-265ml","title":"Fernox Protector F1 265ml","description":"\u003cp data-start=\"23\" data-end=\"281\"\u003e\u003cstrong data-start=\"23\" data-end=\"55\"\u003eFernox Protector F1 (265 ml)\u003c\/strong\u003e is a corrosion-inhibiting additive formulated for use in central heating systems. It helps protect metal components from \u003cstrong data-start=\"177\" data-end=\"221\"\u003erust, corrosion, and limescale formation\u003c\/strong\u003e, supporting efficient heat transfer and longer system life.\u003c\/p\u003e\n\u003ch3 data-start=\"283\" data-end=\"307\"\u003eFunction \u0026amp; Purpose\u003c\/h3\u003e\n\u003cp data-start=\"308\" data-end=\"778\"\u003eWhen added to the water in a sealed central heating system, Protector F1 forms a protective chemical layer on internal metal surfaces such as the boiler heat exchanger, radiators, pipework, and pump. This coating helps reduce the breakdown of metal due to corrosion and slows the development of mineral scale, which can impair circulation and heat transfer. The result is smoother operation, better efficiency, and reduced risk of faults related to corrosion and debris.\u003c\/p\u003e\n\u003ch3 data-start=\"780\" data-end=\"799\"\u003eCompatibility\u003c\/h3\u003e\n\u003cp data-start=\"800\" data-end=\"1088\"\u003eThis product is suitable for \u003cstrong data-start=\"829\" data-end=\"863\"\u003esealed central heating systems\u003c\/strong\u003e, including combi, system, and conventional boilers. It is formulated to be compatible with typical metals found in heating circuits—such as steel, copper, and aluminium—when used according to the manufacturer’s instructions.\u003c\/p\u003e\n\u003ch3 data-start=\"1090\" data-end=\"1108\"\u003eHow It Works\u003c\/h3\u003e\n\u003cp data-start=\"1109\" data-end=\"1485\"\u003eThe 265 ml bottle is dosed into the system via an appropriate access point, such as the filling loop, boiler service valve, or a magnetic filter connection after the system has been flushed. Once introduced, the inhibitor disperses throughout the system as the heating circulates, helping to condition the water and protect internal components from corrosive attack over time.\u003c\/p\u003e\n\u003ch3 data-start=\"1487\" data-end=\"1505\"\u003eKey Benefits\u003c\/h3\u003e\n\u003cp data-start=\"1506\" data-end=\"1542\"\u003eUsing \u003cstrong data-start=\"1512\" data-end=\"1535\"\u003eFernox Protector F1\u003c\/strong\u003e helps:\u003c\/p\u003e\n\u003cp data-start=\"1544\" data-end=\"1836\"\u003eMaintain cleaner system water by slowing corrosion\u003cbr data-start=\"1594\" data-end=\"1597\"\u003eImprove heat transfer and circulation efficiency\u003cbr data-start=\"1645\" data-end=\"1648\"\u003eReduce the risk of boiler and pump wear caused by debris and rust products\u003cbr data-start=\"1722\" data-end=\"1725\"\u003eHelp minimise cold spots in radiators caused by blockages\u003cbr data-start=\"1782\" data-end=\"1785\"\u003eSupport quieter operation and longer component life\u003c\/p\u003e\n\u003ch3 data-start=\"1838\" data-end=\"1862\"\u003eIdeal Applications\u003c\/h3\u003e\n\u003cp data-start=\"1863\" data-end=\"2039\"\u003eThis inhibitor is ideal for heating engineers, service technicians, and homeowners looking to protect a central heating system against corrosion and scale. It is commonly used:\u003c\/p\u003e\n\u003cp data-start=\"2041\" data-end=\"2195\"\u003eWhen commissioning a new system\u003cbr data-start=\"2072\" data-end=\"2075\"\u003eAfter flushing and cleaning a system\u003cbr data-start=\"2111\" data-end=\"2114\"\u003eDuring routine annual maintenance\u003cbr data-start=\"2147\" data-end=\"2150\"\u003eWhen upgrading or replacing boiler components\u003c\/p\u003e\n\u003ch3 data-start=\"2197\" data-end=\"2213\"\u003eUsage Note\u003c\/h3\u003e\n\u003cp data-start=\"2214\" data-end=\"2533\"\u003eAlways follow Fernox dosing guidelines based on the total water volume of the heating system. After adding Protector F1, allow the system to circulate normally to ensure thorough distribution of the protective chemistry throughout the system. Regular testing and maintenance help sustain effective long-term protection.\u003c\/p\u003e","brand":"Fernox","offers":[{"title":"Default Title","offer_id":57056154419545,"sku":"23118401","price":8.51,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0982\/9738\/1209\/files\/23118401_FO.jpg?v=1768825921"},{"product_id":"fernox-central-heating-protector-f1-express-400ml","title":"Fernox Central Heating Protector F1 Express 400ml","description":"\u003cp data-start=\"23\" data-end=\"372\"\u003e\u003cstrong data-start=\"23\" data-end=\"79\"\u003eFernox Central Heating Protector F1 Express (400 ml)\u003c\/strong\u003e is a fast-acting corrosion inhibitor designed to protect central heating systems from \u003cstrong data-start=\"166\" data-end=\"206\"\u003erust, corrosion, and scale formation\u003c\/strong\u003e. It conditions the water quickly, helping to safeguard the boiler, radiators, and pipework even when added shortly before system commissioning or during maintenance.\u003c\/p\u003e\n\u003ch3 data-start=\"374\" data-end=\"398\"\u003eFunction \u0026amp; Purpose\u003c\/h3\u003e\n\u003cp data-start=\"399\" data-end=\"848\"\u003eThis inhibitor works by forming a protective chemical layer on the metal surfaces inside a central heating system. By preventing corrosion and reducing the formation of scale, it helps maintain efficient heat transfer and prolongs the life of key components such as the boiler heat exchanger and circulation pump. The \u003cstrong data-start=\"717\" data-end=\"728\"\u003eExpress\u003c\/strong\u003e formulation means it starts working faster than standard inhibitors, making it useful when a rapid treatment is needed.\u003c\/p\u003e\n\u003ch3 data-start=\"850\" data-end=\"869\"\u003eCompatibility\u003c\/h3\u003e\n\u003cp data-start=\"870\" data-end=\"1152\"\u003eF1 Express is suitable for use in \u003cstrong data-start=\"904\" data-end=\"938\"\u003esealed central heating systems\u003c\/strong\u003e, including combi, system, and conventional boilers common in domestic installations. It is formulated to be compatible with metals typically found in central heating circuits, such as steel, copper, and aluminium.\u003c\/p\u003e\n\u003ch3 data-start=\"1154\" data-end=\"1172\"\u003eHow It Works\u003c\/h3\u003e\n\u003cp data-start=\"1173\" data-end=\"1536\"\u003eThe 400 ml bottle is added to the system via an access point such as the filling loop or magnetic filter connection. Once introduced, the inhibitor disperses throughout the system as the heating circulates, quickly establishing corrosion protection. It can be used as part of routine maintenance or added when a system is being commissioned, flushed, or refilled.\u003c\/p\u003e\n\u003ch3 data-start=\"1538\" data-end=\"1556\"\u003eKey Benefits\u003c\/h3\u003e\n\u003cp data-start=\"1557\" data-end=\"1587\"\u003eUsing Fernox F1 Express helps:\u003c\/p\u003e\n\u003cp data-start=\"1589\" data-end=\"1884\"\u003eMaintain cleaner system water by minimising corrosion products\u003cbr data-start=\"1651\" data-end=\"1654\"\u003eImprove heat transfer efficiency\u003cbr data-start=\"1686\" data-end=\"1689\"\u003eReduce the risk of boiler and pump wear caused by corrosion debris\u003cbr data-start=\"1755\" data-end=\"1758\"\u003eSupport quieter pump and radiator operation\u003cbr data-start=\"1801\" data-end=\"1804\"\u003eProvide rapid protection when there is limited time before heating commissioning\u003c\/p\u003e\n\u003ch3 data-start=\"1886\" data-end=\"1910\"\u003eIdeal Applications\u003c\/h3\u003e\n\u003cp data-start=\"1911\" data-end=\"2270\"\u003eThis product is ideal for heating engineers, service technicians, and homeowners who want \u003cstrong data-start=\"2001\" data-end=\"2038\"\u003equick-acting corrosion protection\u003c\/strong\u003e—for example, after a system clean, during a boiler upgrade, or just before winter use. It’s particularly beneficial when normal inhibitor dosing hasn’t been previously applied and rapid conditioning of the system water is required.\u003c\/p\u003e\n\u003ch3 data-start=\"2272\" data-end=\"2288\"\u003eUsage Note\u003c\/h3\u003e\n\u003cp data-start=\"2289\" data-end=\"2613\"\u003eAlways follow the manufacturer’s dosing instructions based on system size. After adding the inhibitor, allow the system to circulate normally to ensure effective distribution. For long-term protection it may be combined with routine maintenance practices such as filter installation and periodic testing of inhibitor levels.\u003c\/p\u003e","brand":"Fernox","offers":[{"title":"Default Title","offer_id":57056154452313,"sku":"50010334","price":16.9,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0982\/9738\/1209\/files\/50010334_FO.jpg?v=1768825698"},{"product_id":"fernox-cleaner-f3-265ml","title":"Fernox Cleaner F3 265ml","description":"\u003cdiv class=\"flex flex-col text-sm pb-25\"\u003e\n\u003carticle class=\"text-token-text-primary w-full focus:outline-none [--shadow-height:45px] has-data-writing-block:pointer-events-none has-data-writing-block:-mt-(--shadow-height) has-data-writing-block:pt-(--shadow-height) [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" data-turn-id=\"b307cb45-7685-4967-8208-c42213fd4493\" data-testid=\"conversation-turn-392\" data-scroll-anchor=\"true\" data-turn=\"assistant\" tabindex=\"-1\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:--spacing(4)] @w-sm\/main:[--thread-content-margin:--spacing(6)] @w-lg\/main:[--thread-content-margin:--spacing(16)] px-(--thread-content-margin)\"\u003e\n\u003cdiv class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\" tabindex=\"-1\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col grow\"\u003e\n\u003cdiv data-message-author-role=\"assistant\" data-message-id=\"de1cda17-c7b2-4a54-bef2-e3059b025e1b\" dir=\"auto\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal [.text-message+\u0026amp;]:mt-1\" data-message-model-slug=\"gpt-5-2\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden first:pt-[1px]\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert w-full break-words light markdown-new-styling\"\u003e\n\u003cp data-start=\"23\" data-end=\"334\"\u003e\u003cstrong data-start=\"23\" data-end=\"53\"\u003eFernox Cleaner F3 (265 ml)\u003c\/strong\u003e is a central heating system cleaning additive designed to help remove \u003cstrong data-start=\"124\" data-end=\"198\"\u003einstallation debris, oils, flux residues, and loose corrosion products\u003c\/strong\u003e from new or existing heating circuits. It prepares the system water for effective corrosion protection and improves overall efficiency.\u003c\/p\u003e\n\u003ch3 data-start=\"336\" data-end=\"360\"\u003eFunction \u0026amp; Purpose\u003c\/h3\u003e\n\u003cp data-start=\"361\" data-end=\"784\"\u003eDuring installation, servicing, or repair work, contaminants such as soldering flux, metal filings, and rust particles can remain in the heating system. These impurities can reduce flow, impair heat transfer, and contribute to cold spots on radiators or noisy pump operation. \u003cstrong data-start=\"637\" data-end=\"651\"\u003eF3 Cleaner\u003c\/strong\u003e breaks down and disperses these contaminants so they can be flushed out of the system before adding a long-term corrosion inhibitor.\u003c\/p\u003e\n\u003ch3 data-start=\"786\" data-end=\"805\"\u003eCompatibility\u003c\/h3\u003e\n\u003cp data-start=\"806\" data-end=\"1085\"\u003eThis cleaner is suitable for use in \u003cstrong data-start=\"842\" data-end=\"876\"\u003esealed central heating systems\u003c\/strong\u003e including combi, system, and conventional boiler installations. It is formulated to be compatible with common heating system materials such as steel, copper, and aluminium when used according to instructions.\u003c\/p\u003e\n\u003ch3 data-start=\"1087\" data-end=\"1105\"\u003eHow It Works\u003c\/h3\u003e\n\u003cp data-start=\"1106\" data-end=\"1599\"\u003eThe \u003cstrong data-start=\"1110\" data-end=\"1120\"\u003e265 ml\u003c\/strong\u003e bottle is added to the system via a suitable access point such as a filling loop or filter connection. Once introduced, the system should be run under normal operating conditions for a recommended period to allow the cleaner to circulate and interact with contaminants. After the cleaning period, the system must be \u003cstrong data-start=\"1437\" data-end=\"1476\"\u003ethoroughly flushed with clean water\u003c\/strong\u003e to remove the suspended debris. Following flushing, a corrosion inhibitor should be added to protect the system long term.\u003c\/p\u003e\n\u003ch3 data-start=\"1601\" data-end=\"1619\"\u003eKey Benefits\u003c\/h3\u003e\n\u003cp data-start=\"1620\" data-end=\"2005\"\u003eUsing Fernox F3 Cleaner helps improve heat transfer and circulation by removing soluble and suspended contaminants early in the system’s life or after servicing. Cleaner system water supports quieter operation, more even radiator heating, and reduced risk of performance issues caused by debris build-up. Removing contaminants also allows corrosion inhibitors to work more effectively.\u003c\/p\u003e\n\u003ch3 data-start=\"2007\" data-end=\"2031\"\u003eIdeal Applications\u003c\/h3\u003e\n\u003cp data-start=\"2032\" data-end=\"2328\"\u003eF3 Cleaner is ideal for \u003cstrong data-start=\"2056\" data-end=\"2093\"\u003enew central heating installations\u003c\/strong\u003e, boiler upgrades, or systems that have been drained and refilled after repair work. It is commonly used as part of a complete system preparation process—cleaning first, then flushing, and finally protecting with a corrosion inhibitor.\u003c\/p\u003e\n\u003ch3 data-start=\"2330\" data-end=\"2346\"\u003eUsage Note\u003c\/h3\u003e\n\u003cp data-start=\"2347\" data-end=\"2558\"\u003eAlways follow the manufacturer’s dosing and safety instructions. After cleaning and flushing, add a suitable corrosion inhibitor or conditioner to ensure lasting protection against corrosion and scale formation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"z-0 flex min-h-[46px] justify-start\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"mt-3 w-full empty:hidden\"\u003e\n\u003cdiv class=\"text-center\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/article\u003e\n\u003c\/div\u003e","brand":"Fernox","offers":[{"title":"Default Title","offer_id":57056154616153,"sku":"23118501","price":8.51,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0982\/9738\/1209\/files\/23118501_FO.jpg?v=1768820240"},{"product_id":"fernox-f4-leak-sealer-500ml-formerly-lsi","title":"Fernox F4 leak sealer 500ml (formerly LSI)","description":"\u003cp data-start=\"23\" data-end=\"363\"\u003e\u003cstrong data-start=\"23\" data-end=\"70\"\u003eFernox F4 Leak Sealer 500 ml (formerly LSI)\u003c\/strong\u003e is a specialist central heating system additive designed to \u003cstrong data-start=\"131\" data-end=\"172\"\u003estop and prevent internal water leaks\u003c\/strong\u003e in sealed heating systems. It’s formulated to travel with the circulating water and seal small leaks or weeps in radiators, pipework, and boiler heat exchangers without blocking normal flow.\u003c\/p\u003e\n\u003ch3 data-start=\"365\" data-end=\"389\"\u003eFunction \u0026amp; Purpose\u003c\/h3\u003e\n\u003cp data-start=\"390\" data-end=\"828\"\u003eF4 Leak Sealer works by depositing sealing polymers at sites of \u003cstrong data-start=\"454\" data-end=\"479\"\u003eminor leaks and drips\u003c\/strong\u003e within a heating system. When water escapes through small gaps in metal or joints, the pressure change causes the sealing agents in F4 to activate and collect at the leak location, forming a flexible, durable seal. This helps reduce or eliminate slow weeps or drips that can lead to loss of system water, pump noise, corrosion, and pressure issues.\u003c\/p\u003e\n\u003ch3 data-start=\"830\" data-end=\"849\"\u003eCompatibility\u003c\/h3\u003e\n\u003cp data-start=\"850\" data-end=\"1259\"\u003eThis product is suitable for use in \u003cstrong data-start=\"886\" data-end=\"920\"\u003esealed central heating systems\u003c\/strong\u003e including combi, system, and conventional boilers. It is compatible with metal pipework (such as copper and steel) and radiators when used as directed. Fernox F4 can be used alongside corrosion inhibitors and conditioners, but always follow instructions regarding sequencing (typically add F4 after initial cleaning and inhibitor dosing).\u003c\/p\u003e\n\u003ch3 data-start=\"1261\" data-end=\"1279\"\u003eHow It Works\u003c\/h3\u003e\n\u003cp data-start=\"1280\" data-end=\"1667\"\u003eThe 500 ml bottle is added directly to the system via a filling point such as a filling loop or magnetic filter connection. Once introduced, the system is run at normal operating temperature so the product circulates and the sealing action can take effect. Over time, the leak sealer collects at leak sites and hardens to form a flexible, lasting seal without impeding normal water flow.\u003c\/p\u003e\n\u003ch3 data-start=\"1669\" data-end=\"1687\"\u003eKey Benefits\u003c\/h3\u003e\n\u003cp data-start=\"1688\" data-end=\"2091\"\u003eF4 Leak Sealer provides a \u003cstrong data-start=\"1714\" data-end=\"1757\"\u003enon-invasive way to address small leaks\u003c\/strong\u003e without the need for immediate drain-downs or component replacement. It helps reduce water loss, maintain system pressure, minimise the need for repeated top-ups, and avoid corrosion that can accompany persistent moisture and oxygen ingress. It can save time, prevent damage, and extend system life by keeping water where it belongs.\u003c\/p\u003e\n\u003ch3 data-start=\"2093\" data-end=\"2117\"\u003eIdeal Applications\u003c\/h3\u003e\n\u003cp data-start=\"2118\" data-end=\"2526\"\u003eThis leak sealer is ideal for central heating systems that suffer from \u003cstrong data-start=\"2189\" data-end=\"2219\"\u003eminor internal leak issues\u003c\/strong\u003e, such as hairline cracks in radiators, slight weeping at joints, or small pinhole leaks in boiler heat exchangers or pipework. It’s often used by heating engineers and homeowners as a preventative or corrective maintenance product, particularly in hard-to-access areas where mechanical repair is difficult.\u003c\/p\u003e\n\u003ch3 data-start=\"2528\" data-end=\"2544\"\u003eUsage Note\u003c\/h3\u003e\n\u003cp data-start=\"2545\" data-end=\"2857\"\u003eAlways follow the manufacturer’s instructions for dosing and circulation time. F4 Leak Sealer is designed for \u003cstrong data-start=\"2655\" data-end=\"2679\"\u003eminor internal leaks\u003c\/strong\u003e and is not a substitute for mechanical repair of major faults. After treatment, monitor system pressure and performance, and consider a professional inspection if leaks persist.\u003c\/p\u003e","brand":"Fernox","offers":[{"title":"Default Title","offer_id":57056154648921,"sku":"50010254","price":19.95,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0982\/9738\/1209\/files\/50010254_FO.jpg?v=1768820129"},{"product_id":"fernox-f3-cleaner-500ml","title":"Fernox F3 cleaner 500ml","description":"\u003cp data-start=\"23\" data-end=\"340\"\u003e\u003cstrong data-start=\"23\" data-end=\"53\"\u003eFernox F3 Cleaner (500 ml)\u003c\/strong\u003e is a chemical cleaning agent formulated to remove \u003cstrong data-start=\"104\" data-end=\"172\"\u003einstallation debris, oils, greases, and loose corrosion products\u003c\/strong\u003e from central heating systems. It’s intended to be used before adding corrosion inhibitors, helping prepare the system for long-term protection and efficient operation.\u003c\/p\u003e\n\u003ch3 data-start=\"342\" data-end=\"366\"\u003eFunction \u0026amp; Purpose\u003c\/h3\u003e\n\u003cp data-start=\"367\" data-end=\"906\"\u003eDuring installation or servicing of a heating system, contaminants such as soldering flux, metal filings, sealant residues, and rust particles can remain in the system water. These impurities can reduce flow, impair heat transfer, and lead to cold radiator spots or noisy pumps. \u003cstrong data-start=\"646\" data-end=\"660\"\u003eF3 Cleaner\u003c\/strong\u003e works by dispersing these contaminants into the system water so they can be \u003cstrong data-start=\"737\" data-end=\"752\"\u003eflushed out\u003c\/strong\u003e during a system flush. It prepares the heating circuit for the addition of a corrosion inhibitor, improving efficiency and helping extend component life.\u003c\/p\u003e\n\u003ch3 data-start=\"908\" data-end=\"927\"\u003eCompatibility\u003c\/h3\u003e\n\u003cp data-start=\"928\" data-end=\"1193\"\u003eThis cleaner is suitable for use in \u003cstrong data-start=\"964\" data-end=\"998\"\u003esealed central heating systems\u003c\/strong\u003e, including combi, system, and conventional boilers. It is formulated to be compatible with typical heating system metals such as steel, copper, and aluminium when used according to instructions.\u003c\/p\u003e\n\u003ch3 data-start=\"1195\" data-end=\"1213\"\u003eHow It Works\u003c\/h3\u003e\n\u003cp data-start=\"1214\" data-end=\"1662\"\u003eThe 500 ml bottle is added to the system via an appropriate filling point, such as a filling loop or filter connection. The heating system is then run for a period as recommended, allowing the cleaner to circulate and break down debris. After the cleaning period, the system should be thoroughly flushed with clean water to remove suspended contaminants. Once flushed, a corrosion inhibitor should be added to protect the system over the long term.\u003c\/p\u003e\n\u003ch3 data-start=\"1664\" data-end=\"1682\"\u003eKey Benefits\u003c\/h3\u003e\n\u003cp data-start=\"1683\" data-end=\"2104\"\u003eUsing \u003cstrong data-start=\"1689\" data-end=\"1710\"\u003eFernox F3 Cleaner\u003c\/strong\u003e helps improve circulation and heat transfer by removing soluble and suspended contaminants early in the system’s life. It reduces the risk of performance issues, prepares the system for effective corrosion protection, and supports quieter, more efficient heating operation. By removing debris before it settles, the product helps prevent future blockages and wear on the boiler and components.\u003c\/p\u003e\n\u003ch3 data-start=\"2106\" data-end=\"2130\"\u003eIdeal Applications\u003c\/h3\u003e\n\u003cp data-start=\"2131\" data-end=\"2455\"\u003eFernox F3 Cleaner is ideal for \u003cstrong data-start=\"2162\" data-end=\"2199\"\u003enew central heating installations\u003c\/strong\u003e, boiler upgrades, or systems that have been drained and refilled after repair. It’s commonly used as part of pre-commissioning preparation or during servicing to ensure the system is clean before introducing a corrosion inhibitor or long-term conditioner.\u003c\/p\u003e\n\u003ch3 data-start=\"2457\" data-end=\"2473\"\u003eUsage Note\u003c\/h3\u003e\n\u003cp data-start=\"2474\" data-end=\"2679\"\u003eAlways follow the manufacturer’s dosing and safety instructions. After cleaning with F3 and flushing the system, add a suitable inhibitor to ensure lasting protection against corrosion and scale formation.\u003c\/p\u003e","brand":"Fernox","offers":[{"title":"Default Title","offer_id":57056154681689,"sku":"50010240","price":25.64,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0982\/9738\/1209\/files\/50010240_FO.jpg?v=1768819987"},{"product_id":"fernox-tf1-omega-filter-seal-and-o-ring-kitvalves","title":"Fernox TF1 Omega Filter Seal And O-Ring Kit(Valves)","description":"\u003cdiv class=\"flex flex-col text-sm pb-25\"\u003e\n\u003carticle class=\"text-token-text-primary w-full focus:outline-none [--shadow-height:45px] has-data-writing-block:pointer-events-none has-data-writing-block:-mt-(--shadow-height) has-data-writing-block:pt-(--shadow-height) [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" data-turn-id=\"1d28e289-529d-4ed4-b2a5-6e4eefffe299\" data-testid=\"conversation-turn-378\" data-scroll-anchor=\"true\" data-turn=\"assistant\" tabindex=\"-1\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:--spacing(4)] @w-sm\/main:[--thread-content-margin:--spacing(6)] @w-lg\/main:[--thread-content-margin:--spacing(16)] px-(--thread-content-margin)\"\u003e\n\u003cdiv class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\" tabindex=\"-1\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col grow\"\u003e\n\u003cdiv data-message-author-role=\"assistant\" data-message-id=\"3b46ab01-0b40-4f00-93cb-f2e6f0278fa0\" dir=\"auto\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal [.text-message+\u0026amp;]:mt-1\" data-message-model-slug=\"gpt-5-2\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden first:pt-[1px]\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert w-full break-words light markdown-new-styling\"\u003e\n\u003cp data-start=\"23\" data-end=\"343\"\u003eThe \u003cstrong data-start=\"27\" data-end=\"83\"\u003eFernox TF1 Omega Filter Seal and O-Ring Kit (Valves)\u003c\/strong\u003e is a genuine replacement parts kit designed specifically for \u003cstrong data-start=\"145\" data-end=\"182\"\u003eFernox TF1 Omega magnetic filters\u003c\/strong\u003e. It includes essential \u003cstrong data-start=\"206\" data-end=\"237\"\u003eseals, gaskets, and O-rings\u003c\/strong\u003e used in the filter’s internal valve and connection points to maintain a reliable, leak-free installation.\u003c\/p\u003e\n\u003ch3 data-start=\"345\" data-end=\"369\"\u003eFunction \u0026amp; Purpose\u003c\/h3\u003e\n\u003cp data-start=\"370\" data-end=\"828\"\u003eThis kit provides the correct replacement \u003cstrong data-start=\"412\" data-end=\"434\"\u003esealing components\u003c\/strong\u003e for the TF1 Omega filter’s valves and purge\/drain connections. Over time, seals and O-rings can become worn, hardened, or compromised due to temperature cycling, chemical exposure, or regular servicing. Replacing these with new seals from this kit helps ensure that the filter retains a proper seal, prevents leaks at joints and valves, and continues to operate efficiently without water loss.\u003c\/p\u003e\n\u003ch3 data-start=\"830\" data-end=\"849\"\u003eCompatibility\u003c\/h3\u003e\n\u003cp data-start=\"850\" data-end=\"1200\"\u003eThe kit is specifically made to match the \u003cstrong data-start=\"892\" data-end=\"919\"\u003eFernox TF1 Omega Filter\u003c\/strong\u003e range. It includes the correct sizes and types of seals used in the filter’s internal valve cartridges and purge points where the filter connects to system pipework. Using the original replacement seals helps maintain the intended performance and warranty integrity of the filter.\u003c\/p\u003e\n\u003ch3 data-start=\"1202\" data-end=\"1230\"\u003eDesign \u0026amp; Build Quality\u003c\/h3\u003e\n\u003cp data-start=\"1231\" data-end=\"1597\"\u003eThe seals and O-rings in this kit are manufactured to Fernox quality standards using durable elastomer materials. They are engineered to withstand the pressures and temperatures encountered in central heating systems while maintaining flexibility and sealing performance. Replacing old or degraded seals with these ensures a reliable, long-lasting water-tight joint.\u003c\/p\u003e\n\u003ch3 data-start=\"1599\" data-end=\"1623\"\u003eIdeal Applications\u003c\/h3\u003e\n\u003cp data-start=\"1624\" data-end=\"2198\"\u003eThis TF1 Omega Filter Seal and O-Ring Kit is ideal for heating engineers, service technicians, and installers performing \u003cstrong data-start=\"1745\" data-end=\"1773\"\u003emaintenance or servicing\u003c\/strong\u003e on a Fernox TF1 Omega magnetic filter. It is particularly useful when signs of leakage are evident around the filter valves or purge points, when the filter has been disassembled for cleaning, or as part of scheduled preventative maintenance to keep the filter operating at peak efficiency. Replacing seals at the appropriate intervals helps ensure ongoing protection of the central heating system from debris and corrosion.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"z-0 flex min-h-[46px] justify-start\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"mt-3 w-full empty:hidden\"\u003e\n\u003cdiv class=\"text-center\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/article\u003e\n\u003c\/div\u003e","brand":"Fernox","offers":[{"title":"Default Title","offer_id":57056154878297,"sku":"50010102","price":2.87,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0982\/9738\/1209\/files\/50010102_FO.jpg?v=1768817275"},{"product_id":"fernox-express-inhibitor-test","title":"Fernox Express Inhibitor Test","description":"\u003cp data-start=\"23\" data-end=\"339\"\u003eThe \u003cstrong data-start=\"27\" data-end=\"60\"\u003eFernox Express Inhibitor Test\u003c\/strong\u003e is a fast, user-friendly test kit designed to check whether sufficient corrosion inhibitor is present in a central heating system. It gives a quick indication of inhibitor levels in the system water, helping ensure ongoing protection against rust, corrosion, and scale build-up.\u003c\/p\u003e\n\u003ch3 data-start=\"341\" data-end=\"365\"\u003eFunction \u0026amp; Purpose\u003c\/h3\u003e\n\u003cp data-start=\"366\" data-end=\"847\"\u003eThis test kit lets you assess the concentration of corrosion inhibitor in your central heating water on the spot. A small sample of system water is mixed with the test reagent supplied in the kit. A colour change then shows whether the inhibitor level is within the recommended range, too low (indicating topping up is needed), or absent. Maintaining correct inhibitor levels helps protect the boiler, radiators, pumps, and other components from corrosion and prolongs system life.\u003c\/p\u003e\n\u003ch3 data-start=\"849\" data-end=\"868\"\u003eCompatibility\u003c\/h3\u003e\n\u003cp data-start=\"869\" data-end=\"1153\"\u003eThe Express Inhibitor Test is suitable for use with \u003cstrong data-start=\"921\" data-end=\"983\"\u003emost domestic and light commercial central heating systems\u003c\/strong\u003e, including combi, system, and regular boilers. It checks the actual water drawn from the system, regardless of the brand of inhibitor used, making it broadly applicable.\u003c\/p\u003e\n\u003ch3 data-start=\"1155\" data-end=\"1183\"\u003eDesign \u0026amp; Build Quality\u003c\/h3\u003e\n\u003cp data-start=\"1184\" data-end=\"1507\"\u003eThe test kit is compact and designed for ease of use on site. It typically includes simple colour-matching reagents and a sampling tube or vial so that a sample of system water can be tested quickly and without specialist tools. The kit provides an immediate visual result, enabling fast assessment of inhibitor protection.\u003c\/p\u003e\n\u003ch3 data-start=\"1509\" data-end=\"1527\"\u003eKey Benefits\u003c\/h3\u003e\n\u003cp data-start=\"1528\" data-end=\"1879\"\u003eUsing this test kit helps ensure that corrosion inhibitor levels are adequate to protect the heating system against rust, oxidation, and scale formation. Regular testing can inform maintenance decisions, reduce the risk of premature component wear, help avoid breakdowns, and support better energy efficiency by keeping heat transfer surfaces cleaner.\u003c\/p\u003e\n\u003ch3 data-start=\"1881\" data-end=\"1905\"\u003eIdeal Applications\u003c\/h3\u003e\n\u003cp data-start=\"1906\" data-end=\"2269\"\u003eThe Fernox Express Inhibitor Test is ideal for \u003cstrong data-start=\"1953\" data-end=\"2011\"\u003eheating engineers, service technicians, and homeowners\u003c\/strong\u003e who want to verify that the central heating system is properly protected. It’s especially useful during servicing, after system cleaning, when adding new components, or as part of routine annual maintenance to confirm that inhibitor levels remain effective.\u003c\/p\u003e","brand":"Fernox","offers":[{"title":"Default Title","offer_id":57056154911065,"sku":"50010341","price":43.26,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0982\/9738\/1209\/files\/50010341_FO.jpg?v=1768817194"},{"product_id":"fernox-tf1-total-filter-for-heating-system-28mm","title":"FERNOX TF1 total filter for heating system 28mm","description":"\u003cdiv class=\"flex flex-col text-sm pb-25\"\u003e\n\u003carticle class=\"text-token-text-primary w-full focus:outline-none [--shadow-height:45px] has-data-writing-block:pointer-events-none has-data-writing-block:-mt-(--shadow-height) has-data-writing-block:pt-(--shadow-height) [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" data-turn-id=\"6c7db407-f51c-4d26-9855-f5611047430e\" data-testid=\"conversation-turn-372\" data-scroll-anchor=\"true\" data-turn=\"assistant\" tabindex=\"-1\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:--spacing(4)] @w-sm\/main:[--thread-content-margin:--spacing(6)] @w-lg\/main:[--thread-content-margin:--spacing(16)] px-(--thread-content-margin)\"\u003e\n\u003cdiv class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\" tabindex=\"-1\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col grow\"\u003e\n\u003cdiv data-message-author-role=\"assistant\" data-message-id=\"61d10371-fb70-41e4-90c3-4049350b3dee\" dir=\"auto\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal [.text-message+\u0026amp;]:mt-1\" data-message-model-slug=\"gpt-5-2\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden first:pt-[1px]\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert w-full break-words light markdown-new-styling\"\u003e\n\u003cp data-start=\"23\" data-end=\"368\"\u003eThe \u003cstrong data-start=\"27\" data-end=\"81\"\u003eFERNOX TF1 Total Filter for Heating System – 28 mm\u003c\/strong\u003e is a high-efficiency dirt and magnetic filter designed to protect central heating systems. It removes and traps sludge, rust, scale, and other debris from the circulating water before these particles can damage key components such as the boiler heat exchanger, pump, and radiator cores.\u003c\/p\u003e\n\u003ch3 data-start=\"370\" data-end=\"394\"\u003eFunction \u0026amp; Purpose\u003c\/h3\u003e\n\u003cp data-start=\"395\" data-end=\"994\"\u003eInstalled in the \u003cstrong data-start=\"412\" data-end=\"430\"\u003e28 mm pipework\u003c\/strong\u003e of a central heating system—typically on the flow or return near the boiler or pump—the TF1 filter uses both magnetic and non-magnetic filtration. Powerful internal magnets attract and hold ferrous particles (like rust), while internal baffling traps non-magnetic debris. By capturing contaminants circulating in the system water, the filter helps prevent blockages, improves heat transfer, reduces noise, and enhances overall system efficiency. Periodic draining or back-flushing of the filter removes the collected debris and keeps the system operating cleanly.\u003c\/p\u003e\n\u003ch3 data-start=\"996\" data-end=\"1015\"\u003eCompatibility\u003c\/h3\u003e\n\u003cp data-start=\"1016\" data-end=\"1379\"\u003eThis filter is sized for \u003cstrong data-start=\"1041\" data-end=\"1075\"\u003e28 mm central heating pipework\u003c\/strong\u003e, making it suitable for larger domestic systems or light commercial systems that use that pipe diameter. It is compatible with most combi, system, and conventional boilers that accept inline filtration and works alongside other system protection products such as corrosion inhibitors and scale reducers.\u003c\/p\u003e\n\u003ch3 data-start=\"1381\" data-end=\"1409\"\u003eDesign \u0026amp; Build Quality\u003c\/h3\u003e\n\u003cp data-start=\"1410\" data-end=\"1787\"\u003eFERNOX engineers the TF1 Total Filter with a robust body and powerful internal magnets for long-term, reliable performance. The plastic housing resists corrosion and withstands the typical pressures and temperatures found in heating systems. Servicing points and drain valves are designed for ease of use so that captured debris can be removed without disconnecting the filter.\u003c\/p\u003e\n\u003ch3 data-start=\"1789\" data-end=\"1807\"\u003eKey Benefits\u003c\/h3\u003e\n\u003cp data-start=\"1808\" data-end=\"2200\"\u003eInstalling the TF1 filter helps extend the life of boiler and heating components by reducing the amount of circulating debris that causes wear, noise, and blockages. Cleaner system water improves circulation, eliminates cold spots on radiators, and supports more efficient heat transfer. Regular maintenance of the filter contributes to reduced servicing costs and fewer breakdowns over time.\u003c\/p\u003e\n\u003ch3 data-start=\"2202\" data-end=\"2226\"\u003eIdeal Applications\u003c\/h3\u003e\n\u003cp data-start=\"2227\" data-end=\"2681\"\u003eThe \u003cstrong data-start=\"2231\" data-end=\"2264\"\u003eFERNOX TF1 Total Filter 28 mm\u003c\/strong\u003e is ideal for central heating systems with \u003cstrong data-start=\"2307\" data-end=\"2325\"\u003e28 mm pipework\u003c\/strong\u003e, including larger domestic and light commercial installations. It’s particularly beneficial when installed as part of a system protection regime during new build projects, boiler upgrades, or as preventative maintenance where signs of sludge or debris build-up are present. Using the TF1 filter helps maintain efficient and dependable heating performance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"z-0 flex min-h-[46px] justify-start\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"mt-3 w-full empty:hidden\"\u003e\n\u003cdiv class=\"text-center\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/article\u003e\n\u003c\/div\u003e","brand":"Fernox","offers":[{"title":"Default Title","offer_id":57056155042137,"sku":"50010435","price":229.22,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0982\/9738\/1209\/files\/50010435_LF.jpg?v=1768816953"},{"product_id":"fernox-tf1-sigma-hp-filter-22mm","title":"Fernox TF1 Sigma HP Filter 22mm","description":"\u003cdiv class=\"flex max-w-full flex-col grow\"\u003e\n\u003cdiv data-message-author-role=\"assistant\" data-message-id=\"0138b7ba-7786-44c1-9db0-5d9c31a85421\" dir=\"auto\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal [.text-message+\u0026amp;]:mt-1\" data-message-model-slug=\"gpt-5-2\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden first:pt-[1px]\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert w-full break-words light markdown-new-styling\"\u003e\n\u003cp data-start=\"23\" data-end=\"388\"\u003eThe \u003cstrong data-start=\"27\" data-end=\"63\"\u003eFernox TF1 Sigma HP Filter 22 mm\u003c\/strong\u003e is a high-performance magnetic and dirt filter designed to protect central heating systems. It captures and retains magnetic and non-magnetic debris—including sludge, rust, and scale—before these particles can circulate through the boiler, radiators, and heat exchanger, helping improve efficiency and reduce breakdown risk.\u003c\/p\u003e\n\u003ch3 data-start=\"390\" data-end=\"414\"\u003eFunction \u0026amp; Purpose\u003c\/h3\u003e\n\u003cp data-start=\"415\" data-end=\"950\"\u003eThis filter is installed in the \u003cstrong data-start=\"447\" data-end=\"465\"\u003e22 mm pipework\u003c\/strong\u003e of a central heating system, typically on the \u003cstrong data-start=\"512\" data-end=\"530\"\u003eflow or return\u003c\/strong\u003e side near the boiler or pump. As water passes through the filter, powerful internal magnets attract and hold metallic debris, while internal chambering and mesh trap non-magnetic particles. Regular filtration helps prevent blockages, cold spots on radiators, noisy pumps, and reduced heat transfer efficiency. Periodically draining or backflushing the filter removes the captured debris, maintaining system cleanliness.\u003c\/p\u003e\n\u003ch3 data-start=\"952\" data-end=\"971\"\u003eCompatibility\u003c\/h3\u003e\n\u003cp data-start=\"972\" data-end=\"1338\"\u003eThe TF1 Sigma HP Filter is sized for \u003cstrong data-start=\"1009\" data-end=\"1027\"\u003e22 mm pipework\u003c\/strong\u003e, making it suitable for many domestic and light commercial heating circuits. It is compatible with most combi, system, and conventional boiler installations that use this pipe diameter. The filter integrates with standard line sizes and joins using the appropriate connectors supplied or recommended by Fernox.\u003c\/p\u003e\n\u003ch3 data-start=\"1340\" data-end=\"1368\"\u003eDesign \u0026amp; Build Quality\u003c\/h3\u003e\n\u003cp data-start=\"1369\" data-end=\"1680\"\u003eFernox engineered the Sigma HP with a robust body and internal magnetic assembly designed for long-term durability. The filter housing and chamber components are made from corrosion-resistant materials, and the design facilitates easy servicing and debris removal without disconnecting the unit from the system.\u003c\/p\u003e\n\u003ch3 data-start=\"1682\" data-end=\"1700\"\u003eKey Benefits\u003c\/h3\u003e\n\u003cp data-start=\"1701\" data-end=\"2126\"\u003eThis filter helps improve boiler and radiator efficiency by removing harmful debris before it can cause blockages or wear. Cleaner system water supports better circulation, quieter pump operation, and more consistent heat distribution. By reducing sludge and scale build-up, the TF1 Sigma HP Filter can also help extend the life of boiler components and reduce the frequency of service calls related to debris-induced faults.\u003c\/p\u003e\n\u003ch3 data-start=\"2128\" data-end=\"2152\"\u003eIdeal Applications\u003c\/h3\u003e\n\u003cp data-start=\"2153\" data-end=\"2554\"\u003eThe Fernox TF1 Sigma HP Filter 22 mm is ideal for central heating systems with \u003cstrong data-start=\"2232\" data-end=\"2250\"\u003e22 mm pipework\u003c\/strong\u003e, including domestic homes and smaller commercial properties. It’s particularly beneficial when installed in systems that have shown signs of sludge or debris build-up, during boiler upgrades, or as part of preventative maintenance to enhance efficiency, reliability, and longevity of the heating system.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Fernox","offers":[{"title":"Default Title","offer_id":57056155107673,"sku":"50010338","price":106.26,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0982\/9738\/1209\/files\/50010338_FO.jpg?v=1768816872"},{"product_id":"fernox-hp-5c-heat-transfer-fluid-10-litre","title":"Fernox HP-5c Heat Transfer Fluid - 10 Litre","description":"","brand":"Fernox","offers":[{"title":"Default Title","offer_id":57230760804697,"sku":null,"price":68.88,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0982\/9738\/1209\/files\/62543-Fernox-HP-5C-Heat-Transfer-Fluid-10L.jpg?v=1770382724"},{"product_id":"fernox-hp-5-heat-transfer-fluid-20-litre","title":"Fernox HP-5 Heat Transfer Fluid - 20 Litre","description":"","brand":"Fernox","offers":[{"title":"Default Title","offer_id":57230817460569,"sku":null,"price":32.43,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0982\/9738\/1209\/files\/62542-Fernox-HP-5-Heat-Transfer-Fluid-20L_0e074856-d3af-43f9-a9fc-72db6318736d.jpg?v=1770383506"},{"product_id":"fernox-tf1-sigma-22mm-hp-filter-for-heat-pumps","title":"Fernox TF1 Sigma 22mm HP Filter, For Heat Pumps","description":"","brand":"Fernox","offers":[{"title":"Default Title","offer_id":57230819459417,"sku":null,"price":56.47,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0982\/9738\/1209\/files\/62614_tf1-sigma-hp-filter-22mm_1.jpg?v=1770383536"}],"url":"https:\/\/plumbpartsxpressshop.com\/collections\/fernox.oembed","provider":"Plumbparts xpress","version":"1.0","type":"link"}