Zhongquan brand full-auto air-vent valves were first developed in 1985. The products have won many honors including “Famous and High-Quality Product of Jilin, China” and “Famous Brand of Jilin, China” for 2013–2019.

Zhongquan air-vent valve is a full-auto air-vent valve that reliably performs automatic air venting. Please look for the genuine Zhongquan trademark!