GSParts #R Gar-Ber R Spin On Furnace Fuel Oil Filter Epoxy Coated Garber Cartridge - Walmart.com
Durst Rayon Oil Filter Insert - White, Steam Compatible - Hydronic Baseboard Heater Accessories - UL Approved - High Capacity - Westwood, General, Sid Harvey in the Hydronic Baseboard Heater Accessories department at Lowes.com