Van xả khí được khuyên dùng nhằm bảo vệ cho hệ thống tưới nhỏ giọt cũng như hệ thống tưới khác, nó giúp duy trì thuỷ lực trong mỗi hệ thống tưới.
The Rivulis line of air valves include an Air & Vacuum Release Valve, a Continuous Air Valve, and a Combination Air Valve. The air valves are recommended protection for drip and micro irrigation systems, helping to maintain proper hydraulic dynamics in the system design. Each type of air valve is design for a specific function. The Rivulis Air and Vacuum Release Valve is designed to allow large volumes of air to exit on during start up and enter during shut down of an irrigation system. The Rivulis Continuous Air Valve allows small amounts of trapped air in a pipeline under pressure to be released. The combination air valve does both applications.