3/4 Brass Anti-Siphon Valve, Faucet Valves - Canada

Quarter-Turn Frost Free Anti-Siphon Outdoor Hydrant 12-Inch - China Brass Sillcock, Brass Hosebib

Mueller Industries 104-517 Anti-Siphon Frost Proof Sillcock 10 in.

Hose Bibbs & Yard Hydrants at Ace Hardware

Watts 3/4 in. x 3/4 in. Brass FPT x FPT Anti-Siphon Air Admittance Valve 3/4 188A - The Home Depot

Woodford Model 17 8-in L x 1/2-in Copper Sweat Brass Anti-Siphon Push/Pull Sillcock in the Sillcocks & Hose Bibbs department at

SUNGATOR 2-Pack Vacuum Breaker Set, 3/4 Inch Anti-Siphon Hose Bib Valve for Garden Spigot, RV, Solid Brass Anti-Backflow Valve with Tape, Pipe Fittings - Canada

Watts 3/4 in. x 3/4 in. Brass FPT x FPT Anti-Siphon Air Admittance Valve 3/4 188A - The Home Depot

MIFAB HY-9241-NPB 3/4 Polished Chrome Hose Bibb, 3/4 FPT Inlet

Zurn Z1341XL Rough-Bronze Wall Faucet with External Vacuum Breaker

3/4 in. Female Spring Check Valve - Proflo

DIG Corp RBC 8000 Single Station Battery Operated Timer with 3/4″ Anti-Siphon Valve

Breezliy 4-Pack Brass Vacuum Breaker Set 3/4 Anti-Siphon Hose Bib Valve for Garden Spigot RV Hose Connection Backflow Preventer Connector with Tape and Extra washers

Style 212, Sillcock, Frost Free