Name : Copper Check Valve Material: Copper Purpose: prevent water backflow Surface treatment: pure copper Product size: 32 mm (1 inch) Quantity delivered: 2 pieces Material: The check valve is made of high quality brass, high temperature forged one-piece, surface electroplating process, thickened body, tight structure and pressure resistant burst. Function: Assemble the check valve in the pipeline or pump to prevent water from flowing back into the well after the pump is turned off to avoid unnecessary backflow. Easy to install: It can be installed vertically, horizontally and obliquely. It only takes a few turns to tighten our check valve to prevent liquid from flowing back when the pump is off. Both inside and out: The set contains check valves with two different functions, inner wire water inlet and outer wire water inlet, to meet different needs. Application: It can be used for brass check valves in water pumps, fountains, washing machines and gardens. The valves must be assembled with hex keys.