Features Premium Material - This check valve adopts high quality PVC material which can withstand long periods of working in water. Good working performance - When the pump stops working intermittently, the liquid cannot be returned to the water tank and the suction hose is filled with liquid to facilitate the start of the pump. HOW IT WORKS - The pump should ensure that the liquid flows in one direction in the suction line, allowing the pump to work properly. Practical accessory - The bottom valve, also called a check valve, is a low pressure flat valve. Reliable to use - Professionally and conveniently designed with good working performance. Features: Adopts high quality PVC material that can withstand long periods of working in water. The pump should ensure that the liquid flows in only one direction into the suction line, allowing the pump to function properly. Bottom valve, also called check valve, is a low pressure flat valve. Professionally and conveniently designed with good working performance. When the pump stops working intermittently, the liquid cannot be returned to the water tank and the suction hose is filled with liquid to facilitate the start of the pump. Specification: Item Type: Pump Foot Valve Material: PVC. Colour: black. Type: 1.5 inches 2 inches 2.5 inches 3 inches 4 inches (optional) Package list: 1 x valve. Package List