It is the 1" or 11/8" hex nut on the top of the water heater some where buy the supply line. As for the anode rod it could be either depending where it was sold. If you are going to change it out call your water provider and ask which would be better for your area and water.
Answers & Comments
It is the 1" or 11/8" hex nut on the top of the water heater some where buy the supply line. As for the anode rod it could be either depending where it was sold. If you are going to change it out call your water provider and ask which would be better for your area and water.