Excellent replacement for the old or broken check valve of your air compressor. The three male thread connectors are respectively for tube connecting, air pressure tank and compressor piston pump. Multiple scenarios We offer a wide range of different types of valves to suit different customer needs and application scenarios. Easy to install Our valves are easy to install and operate, reducing maintenance and repair time and costs. Convenient to install with the thread connecting ends ., Manufacturer: HIJYMNZPQ