Classic Felt Replacement Cartridge with Gasket, for #77

F15-48 Westwood Engineering Oil Filter Cartridge

The Westwood Engineering F15-48 Oil Filter Cartridge is a professional-grade replacement element designed for compatibility with multiple standard fuel oil filter assemblies. Constructed from high-density classic felt in a stacked-segment configuration, this cartridge provides consistent filtration performance for heating oil and burner systems. It is engineered for use by service technicians in both residential and light commercial oil-fired equipment maintenance and installation.

Technical Specifications

• Manufacturer: Westwood Engineering
• Model Number: F15-48
• Type: Oil Filter Cartridge – Stacked Segment Felt Element
• Material: Classic Felt (Compressed, Multi-Layer Construction)
• Configuration: Stacked Segment Design
• Compatible Filter Models:
  • General Model 1A-25A
  • Unifilter Model 77
  • Westwood Models F10, F12, F15, F20, F25
  • Sid Harvey (Mitco) Models 264, 264F
• Micron Rating: Nominal 10–15 µm (typical for fuel filtration)
• Operating Media: No. 1 and No. 2 Fuel Oil, Diesel, and Light Oils
• Operating Temperature Range: Ambient to 250°F (121°C)
• Flow Orientation: Outside-to-In Filtration
• Seal Type: Compression Fit with Retainer Assembly

Professional Notes

The Westwood F15-48 cartridge is specified for service technicians performing maintenance on oil filter assemblies used in burner and fuel delivery systems. The stacked felt design provides high dirt-holding capacity and uniform filtration efficiency across extended service intervals. Replacement should be performed in accordance with manufacturer-recommended maintenance schedules or when differential pressure indicates reduced flow. Ensure all sealing surfaces and gaskets are clean and properly seated during reassembly to prevent bypass or leakage.

Summary

The Westwood Engineering F15-48 Oil Filter Cartridge is a classic felt, stacked-segment element designed for professional service applications. Compatible with General 1A-25A, Unifilter 77, Westwood F-series, and Sid Harvey 264 filters, it provides reliable filtration performance and system protection in heating oil and burner service operations.