I only use my 22ft travel trailer on weekends, 2 or 3 nights. 6gal water heater. If I drain my hot water tank after every use, is an anode rod really necessary ?
Aluminum anode rods last longer than magnesium but offer less protection. The water quality is a big factor in anode longevity. If you are using the same water as your home, how often do you change the anode in the house water heater?