Backflow Preventer Barb Filter Strainer Check Valve for Home Garden Water Pump Barb Filter Strainer Check Valve for Home Garden Water Well Pump Pool, PVC, Black The foot valve is for preventing debris and dirt from entering the pump and keep the water flowing in one direction. Widely used on pumping water in gardens, lawn irrigation, sprinklers, water sprays, well water, lake water, stream water, ponds, rain buckets, water tanks, etc. Prevent the water can not be returned to the water source tank while the pump stops working intermittently, and the suction pipe is filled with liquid to facilitate the start of the pump. Product Name: Foot Valve Backflow Preventer Color: Black Material: UPVC Tube Barb Dia.: 1" Strainer Max Dia.: 1-1/2" Strainer Length:1-1/2" Over All Length: 7" Package Content: 1 x Foot Valve