B&K ProLine 4 in. Brass FIP Ball Valve Full Port LeverPlumbing valves provide the best value for a variety of residential, commercial and industrial applications including use with steam, water, oil or compressed air. We provide quality gate valves, low pressure valves, stop and waste valves and check valves, as well as a variety of specialty valves many in brass and plastic styles. Most gate valves, low pressure valves and stop and waste valves are available with "ProLine" heavy duty or standard quality