ProLine Galvanized Dielectric Union, 3/4 In. FIP x 1/2 In. Copper Sweat is specifically designed to prevent electrolysis or galvanic action when connecting different metals 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, the dielectric union effectively separates the metals, reducing the risk of corrosion and extending the life of your plumbing. It is suitable for use with water temperatures up to 210 degrees Fahrenheit, making it versatile for both hot and cold water applications. The ProLine Galvanized Dielectric Union a dependable solution for securely connecting dissimilar pipes and protecting your plumbing system over time. Model Number: 168-094NL