Swing Check Valve 50mm WatercoMeet the Waterco Swing Check Valve 50mm a transparent top, spring loaded non return valve built to guard pumps, streamline solar pool systems, and simplify long suction runs. This valve is engineered to keep prime intact, prevent backflow, and give you clear visibility of flow status at a glance. Why this valve stands out See through top for quick diagnostics visually confirm that flow is proceeding forward and spot any obstructions without