Hayward GLX-DIY-CCN15 1-1/2-Inch Plumbing Nuts, Ring and Collar Replacement for Hayward Salt and Swim Salt Chlorination System Nuts, ring and collar replacements Fits Hayward Salt & Swim salt chlorination system These are recommended for 1-1/2-inch plumbing Used with P-KIT pro logic plumbing kit for salt chlorination Also fits with DIY-12 salt and swim and 25,000 gallon, 12 month salt cell