Sacrificial Anode
The role of magnesium anode rod or is to capture the minerals that can bring the water entering the system and thus prevent accumulation of waste in the tank, pipes and fittings (Sarro).
The anode should be replaced at least every year in places where water is a maximum of 50 parts per million and / or have an address scaler minerals and over 50 parts per million are preferably changed every 6 months.