{"product_id":"generalaire-rf-4-oil-filter-cartridge-fulflo-fb4","title":"Generalaire RF-4 Oil Filter Cartridge Fulflo FB4","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe GENERALAIRE RF-4 is a microfiber filter cartridge designed as a direct replacement element for the Fulflo FB4 oil filter housing. This cartridge removes particulates from oil lines in heating and fuel delivery systems, protecting downstream components from contamination. The microfiber construction provides efficient mechanical filtration, trapping fine particles that can damage burner nozzles, valves, and fuel pumps. Installation is handled by licensed oil heating technicians and service professionals as part of routine filter maintenance or oil system servicing.\u003c\/p\u003e\n\u003cp\u003eThe RF-4 cartridge is suited for residential and light commercial oil-fired heating applications where the Fulflo FB4 filter housing is installed inline on the fuel supply line. Replacing the filter element on a scheduled basis keeps fuel delivery consistent and helps prevent premature wear on burner components. This cartridge fits directly into the existing FB4 housing, making it a straightforward field swap during annual tune-up visits or any time elevated pressure drop indicates a clogged element.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eMicrofiber filter media for effective particulate removal from oil fuel lines\u003c\/li\u003e\n  \u003cli\u003eCartridge-style element drops into the Fulflo FB4 housing without additional hardware\u003c\/li\u003e\n  \u003cli\u003eDesigned as a direct OEM-style replacement to maintain original filtration performance\u003c\/li\u003e\n  \u003cli\u003eSupports routine preventive maintenance on oil-fired heating systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a direct replacement cartridge for the Fulflo FB4 oil filter housing.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a qualified oil heating technician. Shut off the oil supply valve and relieve any pressure in the line before opening the filter housing. Dispose of the used cartridge and any residual oil in accordance with local environmental regulations. After reassembly, open the supply valve, check for leaks, and bleed the system as needed before restoring burner operation.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFilter Element Type\u003c\/strong\u003e: Cartridge\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMedia Type\u003c\/strong\u003e: Microfiber\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: GENERALAIRE\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: RF-4\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GENERALAIRE","offers":[{"title":"Default Title","offer_id":51284017283378,"sku":"RF-4","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/309278789.jpg?v=1781066171","url":"https:\/\/voomisupply.com\/products\/generalaire-rf-4-oil-filter-cartridge-fulflo-fb4","provider":"Voomi Supply","version":"1.0","type":"link"}