FS1003 Fuel Water Separator 10 Micron for Cummins ISB ISC ISL ISM
FS1003 is a spin-on fuel water separator for Cummins ISB, ISC, ISL, ISLE, ISM, N14, QSM, QSC, QSL and PX8 diesels, and for Mercedes MBE900 engines. The can is 248.67 mm tall with a 93.73 mm largest diameter on a 1-14 UNS-2B thread, and the 10 micron StrataPore element removes 95% of free water and 95% of emulsified water at 98.7% efficiency. It replaces Cummins 3406889, Baldwin BF1263-SP and Donaldson P551003.
| Tier Pricing (USD / unit) | |
|---|---|
| Qty | Unit Price |
| 1+ units | $23.99 |
| 10+ units🎯 Recommended | $22.79 |
| 50+ units | $20.39 |
| 100+ units | $19.19 |
📋 Key Specs
| Part Number | FS1003 |
| Filter Type | Spin-on fuel water separator |
| Overall Height | 248.67 mm (9.79 in) |
| Outer Diameter | 93.73 mm (3.69 in) largest, 93.47 mm at the seam |
| Thread Size | 1-14 UNS-2B |
| Seal | Gasket, 71.88 mm OD x 62.48 mm ID |
| Media | StrataPore |
| Micron Rating | 10 micron (SAE J1985) |
| Efficiency | 98.7% TWA; 95% free water and 95% emulsified water separation |
| Notes | Standpipe built in; fits filter head FH126, replacement gasket 3313108 |
| Application | Cummins ISB, ISC, ISL, ISLE, ISM, N14, QSM, QSC, QSL, PX8; Mercedes MBE900 |
❓ FAQ
No. Both use the same 1-14 UNS-2B thread and the same 71.88 mm gasket, but the FS1003 is 248.67 mm overall height with a 93.73 mm largest diameter, while the FS1242 is 174.9 mm tall with a 93.04 mm diameter. The taller can holds more media, so the two are not interchangeable on the same filter head.
A single 1-14 UNS-2B thread on top, with a 71.88 mm outside diameter and 62.48 mm inside diameter gasket. The can is 248.67 mm overall height with a 93.73 mm largest diameter and a 93.47 mm seam diameter.
10 micron by SAE J1985, with 98.7% efficiency by time weighted average. The same element separates 95% of free water and 95% of emulsified water, and the published media is StrataPore.
FS1003 is listed for Cummins ISB, ISC, ISL, ISLE, ISM, N14, QSM, QSC, QSL and PX8 ratings, and for Mercedes MBE900 engines. It fits the FH126 filter head, and the replacement gasket is 3313108.
The published change interval is 15,000 miles. Water is drained from the bowl far more often than that, since the separator only holds what it has already caught; leaving it full lets water work back into the fuel.
MOQ varies by product: 5–100 units for standard parts (see product page). Tier pricing decreases with volume. Custom parts usually ≥ 50 units, evaluated by process.
Stock/short-run: 7–15 days; bulk orders 20–35 days; custom 30–45 days incl. sampling. Note your deadline in the inquiry — sales will confirm capacity.
Add products to the inquiry list and submit with contact info. Sales contact you within 24h and issue a formal quotation (tier pricing + proforma invoice) within 48h. The AI assistant can pre-fill inquiries in chat.
Yes. We develop from drawings/samples and support private labeling. Process: evaluation → sampling (15–25 days) → approval → mass production.
Payment: T/T 30% deposit + 70% before shipment / L/C / Trade Assurance. Shipping: FOB Ningbo/Shanghai, CIF or DDP; EU & NA warehouses; sea/air/express.
ISO 9001 & IATF 16949; CE/UL/ATEX on key products. Every batch ships with inspection reports; third-party inspection (SGS/BV) supported.
Description
Product Overview
FS1003 is a spin-on diesel fuel water separator for Cummins ISB, ISC, ISL, ISLE, ISM, N14, QSM, QSC, QSL and PX8 engines, and for Mercedes MBE900 diesels. The can measures 248.67 mm overall height with a 93.73 mm largest diameter, and it threads onto the filter head with a 1-14 UNS-2B connection, sealed by a 71.88 mm gasket. A standpipe is built into the element, so the separator drains through the head rather than trapping water against the media.
Key Features
Cross Reference
Specifications
Applications
📄 Downloads
- FJ-1003-datasheet-en.pdf · 2 KB
