Apollo Valve 61LF-500 Series Bronze Lead Free Ball Cone Check Valve, In-Line, Soft Seat, 3/4" NPT Female, 400 psi/125 psi Pressure Inline Ball Cone check valve for horizontal and vertical orientation with upward flow. Bronze for higher strength and corrosion resistance than brass RPTFE Ball Cone provides higher chemical resistance Female NPT threads for connecting to male threaded pipes Lead free and complies with California's AB 1953 law