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Silver cylindrical spin-on fuel filter with black top and threaded base

Baldwin Filters

Baldwin Filters BF1258 Fuel Filter Spin-On 9 Micron

SKU CH-83BA-15QQG

Spin-on fuel filter and water separator rated at 9 microns with a one-inch thread

  • 9 micron rating removes fine contaminants from fuel
  • Spin-on design allows quick filter changes
  • Integrated drain separates water from fuel system
  • Furnished gasket and standpipe simplify installation
  • 1 inch 14 thread fits compatible fuel lines

Baldwin BF1258 Fuel Filter Application

The Baldwin BF1258 is a spin-on fuel filter with a 9 micron rating designed to separate water from fuel in automotive and heavy-duty systems. It uses a 1 In. -14 thread size for direct installation on compatible filter heads. The unit includes an ES24-D gasket and a standpipe for proper sealing and flow. This filter serves operators who need reliable contamination control in diesel or gasoline circuits.

Spin-On Canister Service and Flow

The spin-on design allows the entire canister to be removed and replaced without tools or spilled fuel during routine maintenance. A drain valve at the base lets collected water be purged before it reaches the engine. The 9 micron media captures fine particles while maintaining adequate flow for normal engine operation. No external power or heating elements are involved in the separation process.

9 Micron Rating and Thread Compatibility

The 9 micron rating determines the smallest particles the media will trap, making it the key figure for matching the filter to the engine manufacturer’s cleanliness requirement. The 1 In. -14 thread size must match the filter head exactly or the filter will not seal. Buyers who need a finer or coarser micron rating, or a different thread pitch, cannot use this part.

Highlights

  • 9 micron rating removes fine contaminants from fuel
  • Spin-on design allows quick filter changes
  • Integrated drain separates water from fuel system
  • Furnished gasket and standpipe simplify installation
  • 1 inch 14 thread fits compatible fuel lines

Specifications

BrandBALDWIN FILTERS

Questions about this item

How do I install the BF1258 spin-on fuel filter and which step is often missed?

Thread the 1 In.-14 filter onto the mounting head by hand until the ES24-D gasket contacts the base, then tighten an additional three-quarters turn; the step often missed is pre-filling the canister with clean fuel to avoid air pockets.

What maintenance or replacement will the BF1258 need over time?

Replace the spin-on cartridge at the engine manufacturer's recommended interval or when the 9 micron media shows pressure drop; the ES24-D gasket is included with each new filter so no separate seal purchase is required.

What limit appears first on the BF1258 during sustained high-flow operation?

The 9 micron media will reach its dirt-holding capacity before the 1 In.-14 thread or standpipe shows wear, signalling replacement by rising restriction.

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