This is a complete burner assembly for a 40 gallon natural gas water heater. It will fit on Rheem, Ruud, GE & Reliance natural gas water heaters that are using a manual type gas valve. This burner will not work with a Honeywell electronic gas valve using a Thermopile millivolt generator. This burner has a thermocouple millivolt generator for use with manual gas valves like but not limited to "White Rogers" or "Robertshaw Unitrol". This burner has been bench tested in our shop by our inhouse State Licensed Master Plumber for function and accuracy. This burner assembly was removed from a 40 gallon natural gas water heater with a leaking tank. We offer FREE Shipping in the continental USA. Returns are accepted and the return shipping is the responsibility of the buyer.
 
THE "RHEEM" BURNER ASSEMBLY WILL NOT FIT ON A "WHIRLPOOL", "KENMORE", "AMERICAN", "STATE", "AO SMITH" OR "BRADFORD WHITE" WATER HEATER. We have replacement burners for those other brands of water heaters if you need one.