Bought a 2007 FR Wildcat. Winterized it and discovered it had an anode rod. So, I'm assuming it's a Suburban water heater. Does anyone know the size of anode rod needed? I can't find anyone who knows (not even service tech!)
If it's a Suburban like you say, it takes a 1-1/16" socket and at least a 6" extension and a ratchet or breaker bar to remove it. Make sure you flip the lever at the top to release the pressure. Stand to one side so you don't get wet. You will need some Teflon tape to wrap the threads on the new one when you put it in.
Suburban recommends Magnesium or Aluminum - right out of the Suburban Anode replacement manual. It says Magnesium should last over a year - if it does not, they recommend Aluminum as it reacts slower and should only be used where a Magnesium anode does not last one year.