Williams Furnace Company 11B46 Inner Liner for Forsaire Furnaces
Williams Furnace Inner Liner for direct replacement on Williams Forsaire 4007 Series (4007332, 4007732, 4007331, 4007731) Counterflow Direct Vent Furnaces and 5008 Series (5008631, 5008632) Counterflow Top Vent Furnaces.
Please call Williams Furnace Technical Support at 888-444-1212 to confirm the correct part required for
your specific furnace needs. You will need the model and the serial number of your specific furnace.