Kasco recommends replacement of zinc anodes every year or sooner if anode is more than 50% depleted.
A zinc anode is supplied on the shaft of all Kasco equipment for protection from corrosion due to electrolysis. The zinc anode should be inspected regularly and replaced if reduced to half of its original size or if white in color.
Corrosion from electrolysis is more commonly associated with saltwater or brackish water, but as a matter of precaution it is important to periodically check the zinc anode in all installations (at least every two to three months)
Kasco Deicer Zinc Anodes are available for 1/2 hp - 3/4 hp - 1 hp De-icers
-Buy Zinc Anode for 1/2 in. motor shafts if you have a 1/2 Hp or 3/4 Hp Deicer.
-Buy Zinc Anode for 5/8 in. motor shafts if you have a 1 Hp Deicer.