{"product_id":"fleetguard-fs1022-fuel-filter-1-pack-primary-diesel-filter-cummins-3800394-fit-water-separation","title":"Fleetguard FS1022 Fuel Filter — 1-Pack Primary Diesel Filter, Cummins 3800394 Fit, Water Separation","description":"\u003cp\u003e\u003cstrong\u003eThe Fleetguard FS1022 is a single-pack primary fuel filter engineered to protect diesel engines by trapping contaminants and fitting Cummins applications that accept part 3800394.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis FS1022 fuel filter by Fleetguard is designed as a rugged, reliable in-line replacement for primary diesel fuel filtration. It fits applications that list Cummins 3800394 and serves as a drop-in alternative to Cummins 3406889, Donaldson P551003, and the Fleetguard FS1003. Built for heavy-duty use, the FS1022 balances filtration efficiency with service life to help maintain engine performance and reduce injector wear from particulate and water intrusion.\u003c\/p\u003e\n\n\u003ch3\u003eWhat vehicles and engines accept the FS1022?\u003c\/h3\u003e\n\u003cp\u003eThe FS1022 matches equipment that specifies Cummins 3800394 and is commonly used across medium- and heavy-duty diesel platforms with compatible filter mounts. Check your engine parts manual or existing filter part number to confirm interchangeability before purchase.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDirect fit for Cummins applications listing part 3800394\u003c\/li\u003e\n  \u003cli\u003eInterchangeable with Cummins 3406889 and Donaldson P551003\u003c\/li\u003e\n  \u003cli\u003eReplaces Fleetguard FS1003 where specified\u003c\/li\u003e\n  \u003cli\u003eSuitable for many on-highway and industrial diesel systems using this primary filter type\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does the FS1022 help protect my diesel engine?\u003c\/h3\u003e\n\u003cp\u003eThe FS1022 is built to capture dirt, rust, and other particulate contaminants while also separating free water from fuel. Cleaner fuel entering the injector system reduces abrasive wear and helps maintain consistent combustion quality over service intervals.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRemoves solid contaminants to protect fuel injectors and pumps\u003c\/li\u003e\n  \u003cli\u003eDesigned to separate and collect free water from diesel fuel\u003c\/li\u003e\n  \u003cli\u003eDurable construction for reliable sealing and reduced bypass risk\u003c\/li\u003e\n  \u003cli\u003eManufactured to Fleetguard quality standards for consistent performance\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat installation and maintenance should I expect?\u003c\/h3\u003e\n\u003cp\u003eInstalling the FS1022 follows standard spin-on fuel filter procedures: relieve system pressure, drain as needed, remove the old filter, lubricate the gasket, and hand-tighten the new unit per torque guidelines. Routine replacement intervals depend on engine hours, fuel quality, and operating conditions; always follow the equipment manufacturer’s service schedule.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSpin-on design for straightforward removal and fitment\u003c\/li\u003e\n  \u003cli\u003eReplace at OEM-recommended intervals or when fuel contamination is suspected\u003c\/li\u003e\n  \u003cli\u003eInspect filter housing and seals during each service\u003c\/li\u003e\n  \u003cli\u003eUse compatible tools and follow torque\/priming steps in the service manual\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy choose Fleetguard FS1022 over alternatives?\u003c\/h3\u003e\n\u003cp\u003eFleetguard produces filters engineered for industrial reliability and consistent manufacturing tolerances, helping ensure a proper seal and predictable flow characteristics. Choosing an FS1022 provides an OEM-level replacement option backed by a widely recognized filtration brand and compatibility with several common part numbers.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eOEM-quality filtration media and components\u003c\/li\u003e\n  \u003cli\u003eInterchangeable with several manufacturer part numbers for easier sourcing\u003c\/li\u003e\n  \u003cli\u003eSingle-pack option for targeted replacement needs\u003c\/li\u003e\n  \u003cli\u003eDesigned for heavy-duty diesel service environments\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The Fleetguard FS1022 (1-pack) is intended for fleet managers, diesel technicians, and owners of medium- to heavy-duty diesel equipment who require a reliable primary fuel filter that fits Cummins-specified applications. It’s a practical choice when you need a single replacement unit that matches Cummins 3800394 specifications and commonly accepted replacement part numbers such as Cummins 3406889, Donaldson P551003, or Fleetguard FS1003. Verify fitment against your engine’s parts list before ordering to ensure correct interchangeability.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is the FS1022 compatible with Cummins engines?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — the FS1022 fits applications that list Cummins part 3800394; confirm against your engine parts list.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can FS1022 replace Donaldson P551003?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — FS1022 is listed as an interchangeable replacement for Donaldson P551003 and similar part numbers.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Fleetguard","offers":[{"title":"Default Title","offer_id":48083972194462,"sku":"B07WHBBVC6","price":80.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/fleetguard-fs1022-front-view.jpg?v=1785841727","url":"https:\/\/northtrailauto.ca\/products\/fleetguard-fs1022-fuel-filter-1-pack-primary-diesel-filter-cummins-3800394-fit-water-separation","provider":"North Trail Auto","version":"1.0","type":"link"}