Ventolo-ST-HR Hot water air release valve for buildings


Designed specifically for inclusion in buildings with hot water

Simple effective method of releasing entrapped air in building networks with hot water

Safe valve design with threaded outlet to plumb to tundish



The CSA Mod. Ventolo-ST-HR is a valve specifically-designed for use in hot water systems within buildings. With its body in ductile cast iron (nickel plated), and internals and float in stainless steel/viton, the valve automatically releases air pockets accumulated on critical points. Thanks to the lever mechanism, the float force is multiplied to reach low sealing pressure values. The valve guarantees high accuracy, even in case of low flow rate conditions, drastically reducing maintenance operations.

The valve is fitted standard with an in built strainer (watermark approved) and a threaded outlet in order that any liquid discharge can be piped away.


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