New 1/4" automatic shutoff valve for reverse osmosis. The valves are constructed from virgin polypropylene using injection molding and very well constructed. The valve operates off a pressure signal and will automatically shut off when system pressure is approximately 65% of supply pressure. We have tested these valves extensively in our RO units and found them to be extremely durable and trouble/leak free. Inlets are color coded for ease of installation. Instructions included. All valves are tested at 60 psi water pressure, prior to shipment.