Commonly used in commercial heating, cooling and snow-ice melting applications, Viega® valved copper manifolds are available in 2 in and 1-1/2 in. They are available with shut-off valves or shut-off balancing valves, and are made out of Type L copper. Viega's copper manifolds are copper (male) headers that are designed to utilize Viega's ProPress® fittings on the header inlet and outlet to connect to primary loop (boiler loop).