NIBCO controls the flow of liquids. NIBCO makes flow-control products such as pipes, fittings, and valves made from bronze, copper, stainless steel, PVC, thermoplastics, and other materials. Its products include DURA-PEX piping systems, Chemtrol flow-control fittings, radiant heating equipment, and press-to-connect fittings and valves. Customers include construction, irrigation, residential, environmental, and industrial buyers throughout the world. It has more than 10 manufacturing plants in the US, Mexico, and Poland. In business since 1904, NIBCO was founded by Casper Schweitzer and is still owned by his descendants (the Martin family) and NIBCO employees.