B & K 104-517 Anti-Siphon, Frost-Free Sillcock Valve, 1/2 x 3/4 in MPT x Hose

CSA certified, meets ASSE standard 1019, chrome-plated body and tube, built-in lockshield, heavy-duty six-point cast-iron handle, threaded ends comply with ANSI b1.20.1, ANSI/NSF 61-9 certified, hose threads comply with ANSI B1.20.7, solder ends comply with ANSI B16.18, backflow preventer checks siphoning back into the water supply, automatically drains upon water shut-off.