Magnesium Tank Anode
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The Anode rod is sacrificial protection material that deteriorates over time, due to the electrolysis processes during the working life of a Mains pressure hot water cylinder. When the Anode has deteriorated the protection factor to the cylinder tank ceases, the electrolysis process then begins to deteriorate the actual tank and will lead to tank leakage, with replacement of the hot water cylinder then required. Overseas it is part of normal Mains Pressure cylinder maintenance to have the Anode rod replaced as preventative maintenance, whilst in NZ it is a known maintenance procedure, and not promoted as a cylinder tank maintenance option.