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Check valves are a type of valve that is commonly used in our daily work and production; they serve to prevent the backflow of fluids. So, in what situations are check valves installed? Let’s go into detail below. When installing a check valve, special attention should be paid to the flow direction of the medium; the normal flow direction of the medium must match the direction indicated by the arrow on the valve body, otherwise it will prevent the medium from flowing properly. The foot valve should be installed at the bottom of the water pump’s suction pipeline. Check valve: A check valve, also known as a one-way valve or non-return valve, serves to prevent the medium in the pipeline from flowing in reverse. The bottom valve at the water pump’s suction side also belongs to the category of check valves. Straight-through lift-type check valves should be installed on horizontal pipelines, while vertical lift-type check valves and foot valves are generally installed on vertical pipelines with the fluid flowing from bottom to top. The improper installation location of swing check valves is a limitation; they are usually installed in horizontal pipelines, but can also be installed in vertical or inclined pipelines. When installing a check valve, special attention should be paid to the flow direction of the medium; the normal flow direction of the medium must match the direction indicated by the arrow on the valve body, otherwise it will prevent the medium from flowing properly. The foot valve should be installed at the bottom of the water pump’s suction pipeline. When a check valve is closed, water hammer pressure is generated in the pipeline, which can, in severe cases, cause damage to the valve, pipelines, or equipment. This is especially true for large-diameter or high-pressure pipelines, so those selecting check valves should pay close attention to this issue.