Why We Use Check Valve

They are commonly installed in applications that backflow would cause an issue. However, since they are non return valves, they are a cheap, effective, and easy solution to solve a potential issue. Backflow can cause an issue if the backflow is contaminated, and therefore, contaminates the media upstream. For example, a sewer line will have a non return valve to ensure that waste can leave but not re-enter the system. They are also used if backflow will cause damage to equipment upstream that can only allow media to flow in one direction. For example, a reverse osmosis filter can only have water pass through it in one direction, so a one way valve is installed downstream to prevent this. There are various sizes, designs, and material to ensure there is a check valve for every application.