7. As a last resort, before the tank makes a fool of you, try to tighten the anode rod just a hair. If it moves tighter then reverse the effort and remove the rod. Sometimes it is easier to turn the threaded part tighter since the last strain was in the tightening phase. Sometimes it works.. Anode rod in the water heater can be very hard to remove. It often happens that the magnesium anode is installed very tight at the factory and is very difficult to remove. It also happens, in older water heaters, that lime builds up and holds the anode in place. The best way to remove an anode that is stuck is to use an impact wrench.
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Turn off the electricity or gas supply to your water heater. Attach a hose to the drain valve near the bottom of the tank. Place the end of the hose in a sink, tub, or bucket, and drain out several gallons of hot water. Check for rust or sediment in the drained water. If the water is discolored, gritty, or smelly, consider fully draining and.. Instead, the anode rod gradually corrodes in place of the steel tank, extending the water heater's lifespan. In most cases, owners will need an anode rod replacement only about once every 3 to 5.