The Woodford 34HF-BR Vacuum Breaker is a NIDEL® Model 34 Anti-Siphon Vacuum Breaker. It is designed to protect hose connections from contamination in mild climate areas. This Woodford Woodford 34HF-BR Vacuum Breaker is the standard vacuum breaker on Woodford Models 24, 74 and 75 wall hydrants. It has a brass and stainless steel construction which make it more dependable and long-lasting. This single-check vacuum breaker from Woodford features a molded rubber diaphragm check valve. It has a 13/16" - 24 special thread x 3/4" hose thread outlet nozzle. This vacuum breaker comes with a brass finish. This device is ASSE 1011 approved. The Woodford 34HF-BR Vacuum Breaker is another quality product from Woodford that can give you years of trouble-free service. Woodford is today's premier manufacturer of wall faucets, yard hydrants, vacuum breakers and bath/lavatory drains and trim kits. All of Woodford's products is proudly made in the USA.