Pool Tool | sku: 133653 Pool Tool 104r-Kit Zinc Anode Replacement Kit Pool Tool Zink AnodeThe Zinc Anode Will Sacrifice Itself And Corrode Before All Other Metals In The Pool.In Doing So, The Anode Protects Other Metal Parts From Galvanic Corrosion.The Zinc Anode Will Need To Be Replaced Approximately Every 3 Years Or When... Log in for pricing