The 098103-01, filter element kit, by Desa from equipsupply.com is the same filter element used in the 098102-01 fuel filter assembly. Even thought there are several different types of fuel filters on high pressure oil heaters, they all work the same, by removing the impurities from the fuel prior to entering the fuel pump. This DES 098103-01, filter element kit, from equipsupply.com is used in Desa brands such as Master, Reddy, Remington, Knipco, Nipco, Koehring, John Deere, John Deer and other torpedo and salamander type kerosene forced air heaters. The DES 098103-01 filter element kit works in the following heaters: B350, B350A, B350B, B350D, F350, K350, K350A, B600, B600A, B600B, and K600. So why are you filtering all of this before your fix your heater. Place your order with equipsupply.com for your 098103-01 filter element kit.