Air Release Valve - AQ88P 25mm

Automat AQ air release valves automatically vent trapped air from irrigation mains at system start-up and admit air during system shutdown to prevent vacuum lock and pipe collapse. Trapped air in irrigation pipework causes pressure fluctuations, uneven sprinkler performance and accelerated water hammer damage; correct air valve installation at high points and ends of mains eliminates these issues. Available in standard and continuous-vacuum-service versions for pressures up to 10 and 15 bar respectively.