Crown Boiler 35-1040 Thermocouple, 30 in.

This was my emergency spare after I had a professional install a thermocouple (parts + labor = $250 which was outrageous). I figured I could install one myself.The professional used a sub-standard generic thermocouple and it failed after a few months because of poor electrical connection at the gas valve (i.e. improper threading which caused a bad seating).This, more expensive part, seats perf