Pool Tool Item Number 104R-KIT Zinc Anode Replacement Kit The 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 it is 1/2 its original size. Kit Includes : Zinc Anode Thru Rod New Cap O-Ring
