ProLine Galvanized Dielectric Union, 1/2 In. FIP x 1/2 In. Copper Sweat is expertly designed to prevent electrolysis or galvanic action when connecting dissimilar materials in plumbing systems. This union is i for joining galvanized pipes to copper pipes, two metals that can cause corrosion when in direct contact. By incorporating a non-conductive material to separate the metals, it effectively reduces the risk of corrosion and damage over time. Suitable for use with water temperatures up to 210 degrees Fahrenheit, this union is for a variety of hot and cold water applications. The ProLine Galvanized Dielectric Union a dependable and efficient solution to extend the life of your plumbing system. Model Number: 168-003NL