Description
Product Overview
The FS19765 Fuel Water Separator is a high-performance filtration solution engineered for Cummins heavy-duty diesel engines. Designed to remove both free and emulsified water from diesel fuel, this 10-micron filter provides critical protection for modern high-pressure common rail (HPCR) fuel injection systems. Whether you're maintaining a fleet of trucks, agricultural equipment, or construction machinery, the FS19765 delivers the reliability and filtration efficiency your engine demands.
Key Features
✅ Superior Water Separation
Effectively removes water and contaminants from diesel fuel with 10-micron filtration media, protecting injectors and fuel pumps from catastrophic failure.
✅ Heavy-Duty Construction
Built with industrial-grade materials designed to withstand high-pressure diesel fuel systems in heavy-duty truck applications.
✅ OEM Compatibility
Direct replacement for Cummins FS19765 fuel water separator filters. Precision-engineered to match OEM specifications for fit and performance.
✅ Extended Service Life
High-capacity filtration media provides longer service intervals compared to standard aftermarket filters, reducing downtime and maintenance costs.
✅ Fuel System Protection
Removes both free and emulsified water from diesel fuel, preventing rust, corrosion, and microbial growth in your fuel system.
Compatibility
| Make |
Model |
Engine |
Year Range |
| Cummins ISX |
ISX11.9 / ISX15 |
11.9L / 15L |
Various |
⚠️ Always verify fitment with your specific vehicle before ordering. Contact us with your engine serial number for confirmation.
Technical Specifications
| Specification |
Value |
| Part Number |
FS19765 |
| Micron Rating |
10 Micron |
| SKU |
FJ-FS19765 |
| Brand |
iFJF |
| Condition |
New |
| Cross References |
FS19765, P550851, FS19763, P550849, FS19764, FS19766 |
Why Choose iFJF
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Quality Guaranteed: Every product is manufactured to meet or exceed OEM specifications for fit, form, and function.
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Expert Support: Our team specializes in diesel aftermarket parts. We know these components inside and out.
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Fast Shipping: Orders ship within 1 business day from our US warehouses.
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Hassle-Free Returns: 30-day return policy. If it doesn't fit or perform, we'll make it right.
Frequently Asked Questions
Q: How often should I replace this fuel water separator?
A: For heavy-duty diesel applications, we recommend replacing the FS19765 fuel water separator every 15,000-25,000 miles or every 500-800 engine hours, whichever comes first. More frequent replacement may be necessary in high-humidity environments or when using biodiesel blends.
Q: What happens if I don't drain the water separator?
A: Failure to drain accumulated water can lead to water passing through to your injectors, causing tip erosion, corrosion, and eventual injector failure. In severe cases, water can cause hydrolock damage. Always drain the water bowl at every oil change or when the water-in-fuel light illuminates.
Q: Is this filter compatible with biodiesel?
A: Yes, the FS19765 is compatible with biodiesel blends up to B20. For higher biodiesel concentrations, more frequent filter changes are recommended as biodiesel tends to clean fuel systems and may cause faster filter loading initially.
Q: Will this fit my truck?
A: The FS19765 is designed for Cummins diesel engines. Please verify your engine model and year against the compatibility table above. If you're unsure, contact us with your engine serial number and we'll confirm fitment.
