Wilkins Model # 950XLTFT 1" Backflow Prevention Device - 1" Female (FIPT) Inlet/Outlet - Heavy brass construction, dual check valve Backflow preventer. Unit has isolation valves at each end for service and testing, and has replaceable test ports and diaphragm components. Top Serviced unit for easy replacement of diaphragm components. This unit meets most area backflow device specs. Check with your local authority to determine if this model meets their requirements.