Fleetguard | 20 Micron Fuel & Water Separator

Fleetguard FS1212 Fuel Water Separator | Genuine Fleetguard Diesel Fuel Filter

Description

Clean fuel is one of the most important factors in maintaining the reliability and longevity of any diesel engine. While fuel filters remove dirt and debris, a quality fuel/water separator also protects the fuel system by removing harmful water before it reaches sensitive components like lift pumps, injection pumps, and fuel injectors.

The Fleetguard FS1212 Fuel Water Separator is a genuine Fleetguard spin-on filter engineered to remove both water and particulate contamination from diesel fuel. Utilizing high-quality cellulose filtration media, the FS1212 provides reliable fuel filtration while separating emulsified water to help protect expensive fuel system components from corrosion, wear, and premature failure. It is designed for heavy-duty diesel applications where dependable fuel filtration is critical.

Whether your truck is used for towing, commercial work, agriculture, or daily driving, keeping water out of the fuel system is one of the easiest ways to improve long-term reliability.

Features

• Genuine Fleetguard fuel/water separator
• Removes harmful water from diesel fuel
• Premium cellulose filtration media
• 17.3 micron(c) filtration efficiency at 96%
• Approximately 90% emulsified water separation
• Heavy-duty steel canister construction
• High contaminant holding capacity
• Designed for reliable fuel flow
• OEM-quality construction and performance

Why Is Water in Diesel Fuel a Problem?

Water is one of the biggest enemies of a diesel fuel system.

Even small amounts of moisture can cause:

• Injector wear
• Corrosion inside fuel system components
• Rust inside steel fuel tanks
• Reduced lubrication of injection pumps
• Biological growth inside fuel tanks
• Poor engine performance
• Hard starting
• Costly fuel system repairs

A quality fuel/water separator removes water before it reaches expensive fuel system components, helping maintain consistent fuel quality and protecting your investment.

Glacier Tech Tip

Many owners replace their fuel filters only after noticing a problem. Unfortunately, by that point contaminants may have already circulated through the fuel system.

Replacing your fuel/water separator at the recommended service interval helps protect:

• Lift pumps
• Injection pumps
• High-pressure fuel pumps
• Injectors
• Fuel pressure regulators
• Fuel rails

Routine fuel filter maintenance is far less expensive than replacing injectors or a high-pressure fuel pump.

Why Choose Genuine Fleetguard?

Fleetguard filtration products are engineered specifically for demanding diesel applications.

Unlike lower-cost aftermarket filters that may sacrifice filtration efficiency or contaminant capacity, Fleetguard designs its filters to provide the proper balance of:

• Fuel flow
• Water separation
• Dirt holding capacity
• Structural strength
• Long service life

The FS1212 delivers approximately 90% emulsified water separation while filtering particles down to 17.3 microns(c) at 96% efficiency, helping maintain clean fuel under demanding operating conditions.

Common Uses

• Preventative maintenance
• Commercial diesel trucks
• Agricultural equipment
• Construction equipment
• Fleet maintenance
• Heavy-duty diesel engines
• Work trucks
• Off-road equipment
• Industrial diesel applications

Applications

The Fleetguard FS1212 is used on numerous heavy-duty diesel engines and fuel systems across commercial, agricultural, industrial, and off-road equipment.

It also replaces several earlier Fleetguard fuel filter part numbers including:

• FF104
• FF105
• FF105C
• FF105D
• FF213

Always verify your filter part number before ordering.

Important Notes

• Genuine Fleetguard FS1212 fuel/water separator.
• Premium cellulose filtration media.
• Approximately 17.3 micron(c) filtration efficiency at 96%.
• Approximately 90% emulsified water separation.
• Replace according to your equipment manufacturer's recommended maintenance interval.
• Drain accumulated water from the separator when applicable.
• Always prefill the filter if recommended by your engine manufacturer and properly prime the fuel system after installation.

Common Failure Point

Many modern diesel fuel systems fail not because of poor fuel quality alone, but because water is allowed to circulate through the system. Water reduces the lubricating properties of diesel fuel and can quickly damage injection pumps, injectors, and precision fuel system components.

Replacing your fuel/water separator on schedule helps prevent contaminants and moisture from reaching the most expensive parts of your fuel system, reducing the likelihood of costly repairs and unplanned downtime.

Complete Your Fuel System Maintenance

For complete fuel system protection, pair your Fleetguard FS1212 with other premium maintenance products:

• Fleetguard Primary Fuel Filters
• Fleetguard Secondary Fuel Filters
• Fleetguard Engine Oil Filters
• Glacier Diesel Power Fuel Pressure Test Kits
• Glacier Diesel Power Fuel Pressure Test Fittings
• Glacier Diesel Power Fuel System Diagnostic Tools
• Glacier Diesel Power Fuel System Components

Routine maintenance with genuine Fleetguard filtration and Glacier Diesel Power diagnostic products helps keep your diesel engine running efficiently, protect expensive fuel system components, and maximize long-term reliability.