LDR Industries 020L6506 Anti Siphon Frost Proof Sillcock Valve 6" x 1/2" M.I.P. x 1/2" Sweat All LDR valves comply with ANSI B16.18 for solder end ANSI B2.1 for pipe threads and ANSI B2.4 hose threads LDR valves are 100% pressure tested directly at the factory LDR is the leader in high quality kitchen, bath and plumbing products for home improvement