Description
Product Overview
The FS1022 Fuel Water Separator Filter is a direct replacement for Cummins ISL, ISB, ISC, and ISM diesel engines used in trucks, buses, motorhomes, and commercial vehicles. This spin-on filter provides critical water separation and particulate filtration to protect high-pressure common rail fuel injection systems. Replaces Fleetguard FS1022, Cummins 3800394, and Baldwin BF1272-SPS.
Key Features
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Cummins Fleetguard Compatible — Direct replacement for FS1022 / Cummins 3800394. Same thread, gasket, and canister dimensions.
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Advanced Water Separation — Treated cellulose media repels water while capturing solid contaminants, preventing corrosion and injector damage in common rail systems operating at 26,000+ PSI.
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Heavy-Duty Construction — Thick steel canister with burst pressure rating exceeding OEM specifications. Nitrile base gasket for reliable sealing.
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Fleet-Grade Performance — Designed for the demands of daily commercial operation. Ideal for fleet maintenance programs, owner-operators, and RV enthusiasts.
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Easy Spin-On Replacement — Standard spin-on design with 1-14 UNS threads. Pre-fill with clean diesel fuel for faster priming.
Compatibility
| Engine Family |
Engine Models |
Typical Applications |
| Cummins ISL |
ISL 8.9L, ISL G, ISL9, L9 |
Transit Buses, Refuse Trucks, Motorhomes |
| Cummins ISB |
ISB 5.9L, ISB 6.7L |
Ram Trucks, School Buses, Medium-Duty |
| Cummins ISC |
ISC 8.3L, ISC 8.9L |
Motorhomes, Fire Trucks, Regional Trucks |
| Cummins ISM |
ISM 10.8L |
Class 8 Trucks, Heavy Equipment |
Cross-Reference Part Numbers
| Brand |
Part Number |
| Fleetguard / Cummins |
FS1022, 3800394 |
| Baldwin |
BF1272-SPS |
| Donaldson |
P564872 |
| WIX |
33674 |
| Luber-finer |
LFF1003 |
| Purolator |
PS8689 |
FAQ
Q: What's the difference between FS1022 and FS1003?
A: Both are similar spin-on fuel/water separators for Cummins engines. The FS1022 is often specified for ISL applications while FS1003 covers ISB/ISC platforms. Verify your housing dimensions and thread specs — they may be interchangeable in some applications but not all.
Q: How often should I change this filter?
A: Recommended service interval is every 15,000 miles or 500 hours of operation. For severe-duty applications (high idle, dusty conditions, biodiesel), change every 10,000 miles or 300 hours.
Q: Does this fit my motorhome with a Cummins ISL?
A: Yes. The FS1022 is commonly used on motorhomes and RVs with Cummins ISL 8.9L engines, including models from Monaco, Holiday Rambler, Fleetwood, and Tiffin.
