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Check Valves and Backflow Preventers in the Plumbing category from GoVets are designed to help customers complete their projects. These products are used to control the flow of liquids and gases in a system. Check Valves are designed to allow flow in one direction and prevent flow in the opposite direction, while Backflow Preventers are designed to prevent the reverse flow of liquids and gases. Shop today to find the right Check Valves and Backflow Preventers for your project.