Viega ProPress zero-lead bronze dielectric union, model 663311Go to product viewer dialog for this item.. Features a 1/2 in. Press connection x 1/2 in. Female Pipe Thread (FPT) connection. Designed for connecting dissimilar metals in plumbing systems, such as copper to steel, providing a secure, watertight seal with Smart Connect technology. Suitable for hydronic heating, water, and compressed air systems

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