Description
PL420 Fuel Water Separator Filter — 30 Micron Spin-On Protection
The iFJF PL420 Fuel Water Separator Filter is a high-efficiency spin-on filter designed to remove water, rust, sand, dirt, and metal particles from your diesel, gasoline, or biodiesel fuel system. Built for standard 420-series filter housings, this water separator protects your engine's fuel pump, injectors, and combustion chamber from contamination damage.
Key Features
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30 Micron Absolute Filtration — Captures harmful particles 30 microns and larger, including carbon, sand, rust, and metal debris
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Water Separation — Hydrophobic filter media separates emulsified water from fuel, preventing injector rust and microbial growth
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Multi-Fuel Compatible — Safe for diesel, gasoline, biodiesel, and blended fuels
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Spin-On Design — Tool-free replacement — simply spin off old filter and spin on the new one in minutes
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Universal 420-Series Fit — Fits standard engine fuel filter assembly 420 housings
Compatibility
The PL420 fuel water separator fits any fuel filter assembly that accepts 420-series spin-on filters. Common applications include:
- Stationary diesel generators (standby & prime power)
- Agricultural equipment — tractors, harvesters, sprayers
- Marine diesel engines — inboard, stern drive, auxiliary
- Light truck and automotive diesel fuel systems
- Biodiesel processing and storage equipment
- Industrial engine applications
⛽ Need Replacement Filter Elements?
🔄 PL420 Replacement Filter Element
This is the complete spin-on filter assembly. If you only need the internal filter element (replacement cartridge), we carry that too:
Shop PL420 Filter Element → — 30 micron, multi-fuel compatible, includes protective sheet.
Specifications
| Filter Type |
Spin-On Fuel Water Separator |
| Model |
PL420 |
| Filtration Rating |
30 Micron |
| Function |
Water Separation + Particulate Filtration |
| Fuel Compatibility |
Diesel, Gasoline, Biodiesel |
| Brand |
iFJF Direct |
Why Water Separation Matters
Water in fuel is the #1 enemy of modern fuel injection systems. Even trace amounts cause:
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Injector Corrosion — Water causes rust inside high-pressure injectors (replacement: $1,500-$4,000+)
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Microbial Growth — Diesel bug (bacteria + fungi) thrives at the fuel-water interface, clogging filters
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Freeze Damage — Water freezes in winter, blocking fuel lines and leaving you stranded
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Poor Combustion — Water-contaminated fuel reduces power and fuel economy
FAQ
Q: How often should I replace this filter?
A: Replace every 500 operating hours or annually, whichever comes first. For biodiesel applications, replace every 250 hours.
Q: What's the difference between this and the filter element?
A: This is the complete spin-on filter assembly (housing + element). The PL420 Filter Element is the replacement cartridge that goes inside your existing housing. If you already have the assembly, just buy the element.
Q: Does this include the filter element?
A: Yes — this is a complete spin-on unit with the filter element pre-installed. For replacement cartridges, check our PL420 Filter Element listing.
Q: Will this fit my [X] engine?
A: If your engine uses a standard 420-series spin-on filter housing, this fits. Check your current filter model — if it shows PL420 or equivalent, this is your replacement.
Q: Does this filter biodiesel?
A: Yes — the filter media is designed to handle biodiesel blends up to B100. However, we recommend more frequent replacement when running biodiesel due to its solvent properties.
