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Cylindrical metal fuel filter cartridge with threaded end caps and 15 micron rating

Baldwin Filters

Baldwin Filters PF121 Fuel Filter 15 micron

SKU CH-494K-EBC4B

Cartridge-style fuel filter element rated at 15 micron with attached end seals

  • 15 micron filtration protects injectors from fine debris
  • cartridge design enables straightforward replacement
  • 1 1/4 inch inner diameter fits compatible fuel lines
  • 5 1/8 inch height suits compact filter housings
  • attached end seals prevent bypass leaks

Application & Purpose

The Baldwin Filters PF121 is a cartridge-style fuel filter designed to remove contaminants from fuel systems. It carries a 15 micron rating to trap fine particles before they reach sensitive injection components. The unit measures 5 1/8 inches in height and length with a width of 3 9/32 inches and includes attached end seals for a secure fit. It suits maintenance on compatible engines requiring this specific filtration level.

Fitment Guidance

This filter suits operators needing a 15 micron cartridge with the listed dimensions and attached end seals. It is not intended for systems requiring a different micron rating, a thread-on mounting style, or alternative dimensional clearances. Buyers who need a finer or coarser filtration rating should verify their engine specifications before ordering. Installers without the correct housing for this cartridge design should look at other configurations.

Capacity & Service Life

The 15 micron element provides effective particle retention for standard fuel system protection under normal operating conditions. Service intervals depend on fuel quality and engine load, so the filter will reach its contaminant capacity faster in dirty fuel environments. There is no thread size, so installation relies entirely on the mating housing. When the element saturates, flow restriction will increase and replacement becomes necessary.

Highlights

  • 15 micron filtration protects injectors from fine debris
  • cartridge design enables straightforward replacement
  • 1 1/4 inch inner diameter fits compatible fuel lines
  • 5 1/8 inch height suits compact filter housings
  • attached end seals prevent bypass leaks

Specifications

BrandBALDWIN FILTERS

Questions about this item

What thread size must my fuel line fitting have to accept the PF121 filter?

The PF121 has no threaded connection; it uses a cartridge design with attached end seals that seat inside a compatible filter housing.

Will the 15 micron element restrict flow on an older mechanical lift pump?

The 15 micron rating is finer than many vintage screens, so verify the pump can maintain adequate pressure drop across the PF121 before installing.

How can I confirm the PF121 is sealing correctly after installation?

Prime the system, start the engine and check the housing seams for wet spots; a dry joint and steady fuel pressure indicate the end seals are seated.

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