Fleetguard FS1000 Fuel/Water Separator — Spin-On Diesel Fuel Filter
Easy 30-Day Returns
You have 30 days from delivery to request a return, with no restocking fees. Return shipping is the customer's responsibility. All sale items are final sale.
The Fleetguard FS1000 is a spin-on fuel/water separator for diesel engines that both filters fuel and removes water to protect the fuel system and injectors. It combines 10-micron fuel filtration (98.7% efficiency per SAE J1985) with coalescing media that separates roughly 95% of free and emulsified water. Commonly used on Cummins engines including Celect, N14, M11, ISC, ISL, ISM, and ISX. Replaces Cummins 3329289.
- Type: Spin-on fuel/water separator
- Micron rating: 10 micron (98.7% per SAE J1985)
- Water separation: ~95% free & emulsified
- Thread: 1-14 UNS-2B
- Dimensions: 3.67" OD × 9.81" height
- Service gasket: 255622S
Replaces: Cummins 3329289, CAT 256-8753, Donaldson P551000, Baldwin BF1259, Wix 33406, Fram PS8048, Purolator F71000.
Shipping information
All in-stock orders ship via UPS Ground. Orders placed before 3:00 PM CST, Monday through Friday, ship the same business day — because downtime costs you money and every hour counts when a truck is down.
Orders placed after 3:00 PM CST, on weekends, or on holidays ship the next business day. As soon as your order leaves our dock you'll receive tracking so you can follow it every mile of the way. Larger or heavier items may ship by freight — if that applies to your order, our team will reach out with the best options.
Have a rush order or a question about delivery? Give us a call and we'll do everything we can to get your parts to you fast.
Returns & warranty
30-Day Returns. Ordered the wrong part or changed your mind? You have 30 days from the delivery date to request a return. Items must be new, unused, and in their original packaging. Some items — such as electrical components and special-order parts — may not be eligible for return, so reach out if you're unsure and we'll be glad to help.
Warranty. We stand behind everything we sell. All parts are covered by the manufacturer's warranty against defects in materials and workmanship. If a part arrives damaged or fails due to a manufacturing defect, contact us and we'll make it right — quickly and hassle-free.
To start a return or a warranty claim, just contact our team with your order number and we'll walk you through the process. We've built our reputation on keeping trucks moving and treating every customer the way we'd want to be treated.
