Manifold: 1.Material:brass and stainless steel 2.Suitable medium:water, ... .Main Diameter: DN25 (1), DN32 (1 1/4)Thermal Valve Floor Heating Manifold, with modulating valve core in supply/return pipe, could connect ... (1), DN32 (1 1/4)Valve Core Travel: 4.5mm Heating Manifold