Mueller Co 300™ Ball Corporation Stop Valve, Lead Free, 1 in Nominal, AWWA Taper Threaded Outlet x 110 CTS, 300 psi, 1 in Orifice, Brass Ball, 1.564 in Top to Inlet Center, Brass Body, Led Brass Alloy Stem Trim, EPDM/Nitrile Softgoods, 2.714 in H

Machine inserted corporation stops were developed by Hieronymus Mueller Co in conjunction with his development of the drilling and tapping machine used to make pressure taps in water mains. During the development of the machine inserted corporation stop, Mr. Mueller designed an inlet thread which became known as the Mueller Co or CC thread. This thread form was eventually adopted by the American Water Works Association and is listed in ANSI/AWWA Standard C800 as the AWWA Taper thread.