Features: Material: Brass + Steel Wire; Thread: 1/2'' / 3/4'' /1''; Medium: Natural Gas, Oil, Water. Bottom for valve is generally used on the water inlet pipe of self-priming pump (pump), mainly to prevent water from backflow (anti-backflow), and also to filter sundries into the pump. It has dual functions and is easy to use and install. The installation of the check for valve can prevent the backflow of the medium, the reverse rotation of the pump and the driving motor, and the discharge of the medium in the container, which plays the role of smooth pumping and saving energy loss. Note: Although the bottom for valve is equipped with an anti-clogging screen, the bottom for valve is generally suitable for cleaning media.The bottom for valve should not be used for medium with excessive viscosity and particle size. Ball valves are widely used in mechanical equipment, industrial equipment, water supply and drainage equipment, such as gardens, water pumps, corner rainwater tanks, external faucets, rainwaters connection with buckets, rainwater collectors, water pipes, etc. Specifications: Material: Copper + Steel Wire Interface: 1/2'' / 3/4'' /1'' Size: As Pictured Note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Brass Check for Valve