ProLine Galvanized Dielectric Union, 1 In. FIP x 1 In. Copper Sweat is specifically designed to prevent electrolysis and galvanic corrosion when connecting different types of metal pipes in plumbing systems. This union is i for joining galvanized pipes to copper pipes, two metals that can cause corrosion if directly connected. By incorporating a non-conductive material between the metals, it effectively separates them, reducing the risk of damage and extending the life of your plumbing. 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 practical solution for maintaining the integrity of your plumbing system. Model Number: 168-005NL