TAJ ENTERPRISES A Lift-Check Valve is a check valve in which the disc, sometimes called a lift, can be lifted up off its seat by higher pressure of inlet or upstream fluid to allow flow to the outlet or downstream side. A guide keeps motion of the disc on a vertical line, so the valve can later reseat properly. Supply stop valves are of different types, such as compression, angled, straight, and quarter-turn. So, you should talk to your plumber to know the type of valve needed for your household plumbing configuration.