{"product_id":"fleetguard-fs1065-fuel-water-separator-pack-of-2-reliable","title":"Fleetguard FS1065 Fuel\/Water Separator Pack of 2 - Reliable","description":"\u003cp\u003eOur review of the Fleetguard FS1065 Fuel\/Water Separator (Pack of 2) finds it best suited for owners and technicians who need an affordable, dependable replacement for Cummins diesel engines. The bottom line: this pack offers sturdy construction and correct dimensions that make it a practical swap for the cross-referenced Cummins 4934879, saving money compared with OE pricing while delivering the filtration performance expected for routine maintenance.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack of 2:\u003c\/strong\u003e Buying two elements together reduces per-filter cost and ensures you have a spare ready at the next service interval.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorrect overall height:\u003c\/strong\u003e The 248.67 mm (9.79 in) height matches the mounting space on compatible housings for an easy physical replacement.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide outer diameter:\u003c\/strong\u003e The largest OD of 93.73 mm (3.69 in) provides the media surface area needed for consistent fuel\/water separation under typical operating conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard thread fit:\u003c\/strong\u003e The 1-14 UNS-2B thread size and included standpipe design simplify installation on engines using the same thread standard.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCrossover compatibility:\u003c\/strong\u003e Cross to Cummins 4934879 and fits elements listed as 3959505S, FH21098, FH21099, FH21100, making it a direct-replacement option for those part numbers.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThis filter is ideal for diesel vehicle owners and fleet maintenance crews running Cummins ISC07 and similar engines that specify the same thread, height, and standpipe features. It suits buyers who prioritize value for money and straightforward, like-for-like replacements during scheduled service.\u003c\/p\u003e\u003cp\u003eIt is less suitable for applications requiring a specialized OEM warranty claim or for users unsure about exact fitment; anyone with a unique housing dimension or an uncommon thread pattern should confirm compatibility before purchase.\u003c\/p\u003e\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eGood filter quality reported by customers, indicating reliable construction for routine fuel\/water separation.\u003c\/li\u003e\n\u003cli\u003eValue for money when purchased as a pack of two, lowering service costs.\u003c\/li\u003e\n\u003cli\u003eDirect cross-reference to Cummins 4934879 and several part numbers means broad replacement compatibility.\u003c\/li\u003e\n\u003cli\u003ePhysical dimensions and thread size match common Cummins ISC07 service requirements for easier installation.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSome customers reported mixed opinions on fit and functionality, so final compatibility checks are recommended before installation.\u003c\/li\u003e\n\u003cli\u003eNot an OEM-branded original part, which may matter for warranty or dealer service programs.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003ePack Quantity\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLargest OD\u003c\/td\u003e\n\u003ctd\u003e93.73 mm (3.69 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOverall Height\u003c\/td\u003e\n\u003ctd\u003e248.67 mm (9.79 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThread Size\u003c\/td\u003e\n\u003ctd\u003e1-14 UNS-2B\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandpipe\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCrossover\u003c\/td\u003e\n\u003ctd\u003eCummins 4934879\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Elements\u003c\/td\u003e\n\u003ctd\u003e3959505S, FH21098, FH21099, FH21100\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eOur Verdict\u003c\/h2\u003e\u003cp\u003eThe Fleetguard FS1065 (Pack of 2) is a practical choice for anyone needing a cost-effective replacement for Cummins-style fuel\/water separators. It offers correct dimensions, a common thread fit, and confirmed crossover compatibility, making it good value for routine maintenance as long as fitment is verified for the specific engine housing.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eDoes this replace Cummins 4934879?\u003c\/strong\u003e\u003cbr\u003eYes, the FS1065 cross-references Cummins 4934879 and is listed as a replacement for that part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the thread and height match my ISC07 housing?\u003c\/strong\u003e\u003cbr\u003eThe filter uses a 1-14 UNS-2B thread and an overall height of 248.67 mm (9.79 in); confirm your housing specs to ensure compatibility.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs buying the pack cost-effective?\u003c\/strong\u003e\u003cbr\u003eCustomers report the pack of two provides better value per filter and gives you a spare for the next service.\u003c\/p\u003e","brand":"Fleetguard","offers":[{"title":"Default Title","offer_id":48160820822235,"sku":"B077FFX7JQ","price":77.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/41fI65vMNeL._AC.jpg?v=1769143933","url":"https:\/\/gearmusthave.com\/products\/fleetguard-fs1065-fuel-water-separator-pack-of-2-reliable","provider":"GearMustHave","version":"1.0","type":"link"}