The "Smart" Check provides you with reliable back-flow prevention without the inline restriction of a conventional check valve. With the use of high powered magnets, the "Smart" Check valve remains in the closed position to 2 PSI, opening fully when 2 lb. line pressure is exceeded. The "Smart" Check has a Spring-Loaded gate mechanism allowing the valve to be installed in any orientation. The valve is also available in a non-magnetic, 1/2 lb. Spring-Loaded version.Available in 1/2" through 3" IPS sizes. The "Smart" Check Valves are rated at 150 PSI at 73°F. All "Smart" Check Valves are also available as a Swing-Check, without Spring. Minimum order quantities apply. Please contact the factory direct for details.