Fleetguard FS1001 10-Micron Fuel & Water Separator | Spin-On Diesel Fuel Filter

Fleetguard FS1001 10-Micron Fuel & Water Separator | Spin-On Diesel Fuel Filter

Description

Before diesel fuel reaches your lift pump, injection pump, or fuel injectors, it should first pass through a quality fuel and water separator.

The Fleetguard FS1001 Fuel & Water Separator is a genuine heavy-duty spin-on filter designed to remove water and larger contaminants before they circulate through your diesel fuel system. Featuring StrataPore® synthetic filtration media, the FS1001 provides 10-micron filtration with 98.7% efficiency, 95% emulsified water separation, and a high flow capacity to support everything from daily-driven pickups to commercial trucks, industrial equipment, and custom diesel fuel systems.

The FS1001 is commonly used in Glacier Diesel Power fuel filtration systems, aftermarket lift pump setups, and a wide variety of heavy-duty diesel applications where dependable fuel filtration and water separation are critical to long-term reliability.

Whether you're replacing a worn separator or building a custom fuel system from the ground up, the Fleetguard FS1001 delivers the protection serious diesel owners expect.

Features

• Genuine Fleetguard FS1001 fuel & water separator
• Advanced StrataPore® synthetic filtration media
• 10-micron filtration
• 98.7% efficiency at 10 microns
• 95% emulsified water separation
• Heavy-duty spin-on construction
• High-flow design rated at approximately 89.8 GPH (340 LPH)
• Excellent contaminant holding capacity
• OEM-quality construction and sealing
• Direct replacement for many Glacier Diesel Power and aftermarket fuel filtration systems

Why a Fuel & Water Separator Is Important

Many people focus on removing dirt from diesel fuel, but water can be just as damaging.

Water enters diesel fuel through:

• Condensation inside fuel tanks
• Contaminated storage tanks
• Poor-quality fuel
• Temperature and humidity changes
• Bulk fuel handling equipment

Once inside the fuel system, water can:

• Reduce diesel fuel lubricity
• Promote corrosion inside pumps and injectors
• Encourage microbial growth in fuel tanks
• Damage precision-machined fuel system components
• Lead to expensive repairs

A quality fuel and water separator removes both contaminants and moisture before they have a chance to circulate through your fuel system.

Glacier Tech Tip

One of the most common mistakes we see is installing a fine fuel filter before the lift pump.

While that may sound like added protection, excessive restriction on the suction side can reduce fuel flow and force the lift pump to work harder.

A properly designed fuel system typically uses:

• A 10-micron fuel & water separator before the lift pump
• A high-efficiency 3 to 5-micron fuel filter after the pump

This staged approach allows the water separator to remove larger contaminants and moisture while the secondary filter captures the fine particles that can damage injectors and high-pressure fuel pumps.

It's one of the reasons Glacier Diesel Power systems are designed around multi-stage filtration rather than relying on a single filter.

Why Choose Genuine Fleetguard?

Fleetguard has been engineering filtration systems alongside Cummins and other diesel engine manufacturers for decades.

The FS1001 is designed to provide:

• High contaminant removal efficiency
• Excellent water separation
• Low restriction
• High dirt-holding capacity
• Long service life
• OEM-quality fit and sealing

Unlike economy replacement filters, genuine Fleetguard products are engineered for demanding commercial, industrial, agricultural, and high-performance diesel applications.

Common Applications

The Fleetguard FS1001 is commonly used on:

• Glacier Diesel Power MK-2 Fuel Filter Systems
• Glacier Diesel Power Universal Fuel Filter Systems
• Aftermarket lift pump systems
• Custom diesel fuel systems
• Heavy-duty diesel trucks
• Agricultural equipment
• Construction equipment
• Industrial engines
• Generator sets
• Marine diesel applications

Important Notes

• Genuine Fleetguard FS1001 fuel & water separator.
• Features StrataPore® synthetic filtration media.
• 10-micron filtration with excellent water separation.
• Verify thread size and gasket dimensions before ordering.
• Lubricate the gasket with clean diesel fuel before installation.
• Prime the fuel system after replacing the filter.
• Replace at the recommended maintenance interval or sooner if contaminated fuel is suspected.

Common Failure Point

Many fuel system failures begin long before a warning light comes on.

Microscopic dirt particles gradually wear pumps and injectors, while water contamination reduces lubrication and promotes corrosion throughout the fuel system. Because this damage occurs over thousands of miles, many owners don't notice a problem until expensive components begin to fail.

Replacing your fuel and water separator on schedule helps keep contaminants and moisture out of your diesel fuel, reducing unnecessary wear and supporting long-term fuel system reliability.

Complete Your Fuel System

For the best fuel system protection, pair the Fleetguard FS1001 with:

• Fleetguard FF5814 NanoNet® 3-Micron Fuel Filter
• Fleetguard FF5289 or FF5079 Inlet Fuel Strainers
• Glacier Diesel Power MK-2 Fuel Filter System
• Glacier Diesel Power Universal Fuel Filter System
• Glacier Diesel Power Fuel Pressure Test Kits
• Glacier Diesel Power Fuel Pressure Test Fittings
• Glacier Diesel Power Fuel System Diagnostic Tools

A quality diesel fuel system relies on layered filtration—a high-flow inlet strainer, an efficient fuel and water separator, and a fine post-pump filter. Together, these components help deliver clean, dry fuel to your engine while protecting the lift pump, injection pump, and injectors from the contaminants that cause premature wear.