Swing Check Valve is one of the most common types of valves, a swing check valve is used inside household toilet tanks, as well as in many other areas. Instead of a ball controlling flow, this valve uses a small door on hinges that opens when water is drawn in and closes when the flow of water is stopped, thereby not allowing any fluid to drain out of the valve’s entrance. This type of valve is also sometimes referred to as a tilting disc check valve.