The Pool Tool Zinc Anode [2" Slip x Slip Inline] is an inline water-treatment accessory designed for 2 inch slip plumbing connections. Zinc anodes are commonly used to help protect compatible pool equipment and metal components by serving as a sacrificial element within the water system.This Pool Tool Inc. inline anode is a practical option for pool owners and service professionals looking to support equipment protection in systems with heaters, metal fittings, saltwater chlorine generators, or other components exposed to potentially corrosive water conditions. Inline zinc anode with 2 inch slip x slip connections Helps support protection of compatible metal equipment components Useful in pool systems with heaters, metal fittings, or salt systems Designed for installation into compatible PVC plumbing runs Pool Tool part 104D for accurate product matching