Fleetguard FS1000 Fuel Water Separator 6-Pack Cummins Caterpillar OEM

Fleetguard FS1000 Fuel Water Separator 6-Pack — Genuine OEM 10-Micron Spin-On Filter for Cummins & Caterpillar Diesel Engines

The Fleetguard FS1000 6-Pack is a case of six genuine Cummins Filtration spin-on fuel/water separators — the most universally compatible fuel filter in the Fleetguard lineup. This single filter fits Cummins ISC, ISL, ISM, ISX, M11, N14, and QSK19 engines AND Caterpillar C7, C9, C10, C11, C12, C13, C15, C16, and 3406 engines, making it the correct fuel/water separator for the majority of Class 8 trucks, school buses, construction equipment, agricultural machinery, marine vessels, and power generation units in North America.

The FS1000 uses StrataPore primary media to deliver 10-micron filtration at 98.7% efficiency (SAE J1985) with 95% emulsified and free water separation. It is a direct spin-on filter (not a cartridge) that threads onto filter heads using a standard 1-14 UNS-2B mount with standpipe. The FS1000 is the mandatory upgrade of the older FS1212 — required on all Cummins Select and Quantum 19L engines equipped with StrataPore filtration.

Buying a 6-Pack provides a full year of service intervals for a single vehicle, or covers one service cycle for a small fleet. With compatibility across 40+ equipment brands and 80+ cross-reference part numbers, the FS1000 is the single most versatile diesel fuel filter you can stock.

Technical Specifications

Specification	Value
Part Number	FS1000
Brand	Fleetguard (Cummins Filtration)
Filter Type	Spin-On Fuel/Water Separator
Media Type	StrataPore
Micron Rating	10 Microns
Filtration Efficiency	98.7% (SAE J1985)
Emulsified Water Separation	95%
Free Water Separation	95%
Overall Height	249.07 mm (9.806 in)
Largest Outside Diameter	93.22 mm (3.67 in)
Gasket Outside Diameter	71.88 mm (2.83 in)
Gasket Inside Diameter	62.48 mm (2.46 in)
Thread Size	1-14 UNS-2B
Standpipe	Yes
Weight	~0.81 kg per filter
Upgrades	FS1212 (direct replacement)
Longer Version Of	FS1001
Marine Equivalent	FS1009
Service Part	255622S (Thread Seal Gasket)
Quantity	6 Filters Per Box

Compatible Filter Heads

Filter Head	Application
142784S	General application
3914857S	Cummins ISC engine
3930618S	General application
3962018S	General application
FH126	Remote mount

Compatible Engines

Engine Brand	Engine Models
Cummins	ISC 8.3L, ISL 9.0L, ISM, ISX, M11 (1995+), N14, QSK19, QSL, QSM
Caterpillar	C7, C9, C10, C11, C12, C13, C15, C16, 3406

Required: On all Cummins Select and Quantum 19L engines equipped with StrataPore filtration technology.

Compatible Trucks, Equipment & Applications

Category	Brands / Models
Class 8 Trucks	Freightliner, Kenworth, Peterbilt, International, Western Star, Volvo, Mack
School Buses	Blue Bird, Thomas Built, IC Bus (with Cummins ISC/ISL)
Construction	Komatsu, Volvo CE, Terex, JCB, Case (with Cummins/Cat power)
Agricultural	Case IH, New Holland, AGCO (with Cummins/Cat power)
Mining	Atlas Copco, Terex, Komatsu
Marine	Cummins marine engines (use FS1009 for marine-certified version)
Power Generation	Cummins gensets with ISC, ISL, ISM, QSK engines
RVs / Motorhomes	Monaco, Newmar, Tiffin (with Cummins ISC/ISL)
Industrial	Compressors, pumps, generators with Cummins/Cat diesel

Cross-Reference Part Numbers (Top 25 — Full list exceeds 80 numbers)

Cross-Reference	Brand
3329289	Cummins (primary OEM)
3889716	Cummins
3945068	Cummins
3161407	Cummins
BF1259	Baldwin
P551000	Donaldson
33406	Wix
3406	NAPA
PS8048	Fram
LFF1000	Luber-Finer
F71000	Purolator
TP1292	AC Delco
H181WK	Hengst
WK965	Mann
2568753 / 256-8753	Caterpillar
RE160384	John Deere
1310368H2	Komatsu
12977622	Volvo
15271319	Terex
87674239	Case IH
86021254	New Holland
5541-7098-00	Atlas Copco
72515622	AGCO
86406	Carquest
FS1212	Fleetguard (superseded)

FS1000 vs FS1212 — What Changed?

Feature	FS1212 (Old/Superseded)	FS1000 (Current/This Product)
Media	Standard cellulose	StrataPore synthetic
Efficiency	Lower	98.7% at 10 microns
Water Separation	Lower	95% emulsified & free
Mount	1-14 UNS-2B	1-14 UNS-2B (same — drop-in)
Status	Superseded	Current production

The FS1000 is a drop-in upgrade. If your engine currently uses the FS1212, switch to the FS1000 — same mount, better filtration.

Related Fleetguard Fuel Filters in Our Store

Filter	Type	Application
FS1000 (this product)	Spin-on, 1-14 UNS-2B thread	Universal Cummins/Cat — direct mount
FF5776	Spin-on, M90 thread	Cummins ISX — secondary, Davco-compatible mount
FS19764	Cartridge for Davco 102527	Cummins ISX — Davco Fuel Pro housing
FS19765	Cartridge for Davco 102528	Volvo D13, Mack MP8 — Davco housing
FS19915	Spin-on cartridge	Detroit DD13/DD15/DD16
FS20172	Cartridge for PACCAR K37-1029	Kenworth/Peterbilt — PACCAR housing

These are NOT interchangeable — each fits a different fuel system platform. The FS1000 is the only spin-on in this group that mounts directly to a filter head without a separate housing.

When to Replace

Replace at each scheduled fuel filter service interval — typically every 15,000-25,000 miles for on-highway applications. Replace sooner if operating in dusty environments, using low-quality fuel, or if you observe loss of power, extended cranking, water-in-fuel warnings, or fuel system fault codes. The FS1000's StrataPore media provides higher dirt-holding capacity than the FS1212, but should still be changed at regular intervals.

What's Included

6x Fleetguard FS1000 Fuel Water Separator Filters — packed in one factory-sealed case. Each filter is genuine Cummins Filtration with StrataPore media and integrated standpipe. Not aftermarket or repackaged.

Why Choose Genuine Fleetguard FS1000?

The FS1000 is Fleetguard's flagship universal fuel/water separator — engineered, tested, and certified by Cummins Filtration for the broadest range of diesel engine applications. Its StrataPore media is specifically designed for modern ULSD (ultra-low sulfur diesel) fuels and provides consistent 95% water separation throughout the entire service interval. Aftermarket equivalents may physically thread onto the same filter head but often use inferior media that allows water and fine particles to reach injectors and fuel pumps. On engines where fuel system repairs cost $5,000-$15,000+, a genuine FS1000 at approximately $20-22 per filter is the smartest investment in fuel system protection.

Shipping Policy

Please carefully review our Shipping Policy when purchasing our products, as it applies to any order you place with us.

WHAT ARE MY SHIPPING & DELIVERY OPTIONS?

Logistics: UPS, USPS, DHL.

We offer free shipping across the USA.

All delivery times and dates provided are estimates and given in good faith.

For EU and UK consumers: This does not affect your statutory rights. Unless specifically noted, estimated delivery times reflect the earliest available delivery, and items will be delivered within 30 days after we accept your order. For more information, please refer to our Terms.

ORDER PROCESSING TIME

Processing Time: 1-2 Days
Shipping Time: 3-7 Days

DO YOU DELIVER INTERNATIONALLY?

Yes, we ship worldwide.

Note:
International deliveries may be subject to various rules and restrictions, and you may incur additional taxes and duties beyond our control. You are responsible for complying with the laws of your country and for any associated costs.

WHAT HAPPENS IF MY ORDER IS DELAYED?

If your delivery is delayed, we will inform you as soon as possible and provide a revised estimated delivery date.

For EU and UK consumers: This does not affect your statutory rights. For more information, please refer to our Terms.

QUESTIONS ABOUT RETURNS?

If you have questions about returns, please review our Return Policy.

COVID-19 STATEMENT & SHIPPING DELAYS

Please be aware that there may be shipping delays due to ongoing COVID-19 impacts. Limited transportation availability may extend delivery times. Our team is doing our best to provide accurate timelines, but the global supply chain is unpredictable, and delays may occur. We appreciate your patience and understanding during this time and are happy to assist with any questions or concerns regarding your orders.

HOW CAN YOU CONTACT US ABOUT THIS POLICY?

If you have any further questions or comments, please contact us at our Support Center.

Thank you for choosing PEAK PERFORMANCE Filters. We hope you are satisfied with your order. However, if you are not completely happy due to any damaged or missing parts, you may return the item for a refund or replacement. Please see below for more information on our return policy.

RETURNS

To be eligible for a refund, you must return the product within 14 calendar days of your purchase. The item must be in the same condition you received it and undamaged. All orders are final; we do not accept returns or exchanges unless the items received are damaged or missing.

We are not liable for any consequences arising from customers purchasing products from us and subsequently selling them on third-party platforms (Amazon, eBay, Walmart, etc.). Any actions taken by these platforms, including listing deactivation or account suspension, are beyond our control. Customers engaging in such activities do so at their own risk and should adhere to the policies and guidelines of those platforms.

RETURN PROCESS

To return an item, please contact customer service to request a refund or replacement with proof of damage or missing parts (such as videos or pictures). Once your claim is verified, contact support to obtain a return address. Securely package the item in its original packaging and include your proof of purchase (Order Invoice). When a return is authorized, PEAK PERFORMANCE Filters will proceed with the refund or replacement.

In some cases, your return shipment may be free of charge. If you return an item for a reason not related to our error, the parcel will be sent back to your original address, and no refund will be initiated.

REFUNDS

After we receive your return and inspect the item, we will process your refund or exchange. Please allow at least 14 days from the receipt of your item for processing. Refunds may take 1-2 billing cycles to appear on your credit card statement, depending on your card issuer. We will notify you via email when your return has been processed.

EXCEPTIONS

The following items cannot be returned or exchanged:

Perishable items
Intimates
Gift cards
Custom items
Digital products

For defective or damaged products, please contact us using the details below to arrange a refund or exchange.

QUESTIONS

If you have any questions regarding our return policy, please contact us at our Support Center.

peakperformancefilters@gmail.com

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QUESTIONS ABOUT RETURNS?

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WHAT ARE MY SHIPPING & DELIVERY OPTIONS?

ORDER PROCESSING TIME

DO YOU DELIVER INTERNATIONALLY?

WHAT HAPPENS IF MY ORDER IS DELAYED?

QUESTIONS ABOUT RETURNS?

COVID-19 STATEMENT & SHIPPING DELAYS

HOW CAN YOU CONTACT US ABOUT THIS POLICY?

RETURNS

RETURN PROCESS

REFUNDS

EXCEPTIONS

QUESTIONS

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