L.P. to Natural Gas Conversion Kit #8943 for Williams Furnace Model #2203821

Description

L.P. to Natural Gas Conversion Kit #8943 for Williams Direct Vent Wall Furnace Model #2203821. Kit consists of the following three parts:
#44 N.G. burner orifice (for sea level to 2000 feet), part#P332628.  This part also fits models 233821 and 2253821, but I don't know about the other two parts;
Pilot burner orifice.  I include the part that it screws into so that you know what to look for, but only the orifice is actually replaced;
Pressure regulator with gasket and screws.
I include installation instructions for going N.G. to L.P. because I couldn't find any for L.P. to N.G., but its the same procedure:
1. Replace the main burner orifice.
2. Replace the pilot orifice
3. Replace the pressure regulator.
There is more detail in the instructions.