Baird Valve and Regulator L.L.C., the original manufacturer of the Back Pressure Regulator, offers a full line of 1”, 2” and 3” liquid and gas relief valves as well as a large stock of pump parts, cages, ball and seat testing machines and a variety of other oilfield related items. All Baird and Larkin products are produced and proudly sourced within the U.S.A. from originating materials-relates to goods made in the U.S.A. from U.S.A. materials.