Automatic Hygroscopic Air Vent 1/2" with O-ring FERRO O15AH

Automatic hygroscopic air vent FERRO O15AH with a 1/2" connection and O-ring is designed to automatically remove trapped air from closed hydronic systems. The device uses a hygroscopic mechanism to absorb moisture and open the vent when air accumulates, maintaining efficient circulation in heating and cooling installations. It is compact and suitable for installation on radiators, collectors and other points where continuous automatic air elimination is needed.

Advantages

The hygroscopic operation enables automatic, maintenance-free air release without manual intervention, reducing the risk of noise, uneven heating and circulation loss. A sealed O-ring connection ensures a reliable, leak-resistant joint with standard 1/2" fittings. The compact form factor allows installation in tight spaces on radiators and manifolds while providing consistent performance in closed-loop hydronic systems.

Suitable for

• Residential and commercial radiators
• Distribution collectors and manifolds
• Closed-loop heating and cooling systems
• Boiler circuits and heat exchangers where automatic air removal is required

Key specifications

• Connection size: 1/2" with O-ring sealing
• Operation type: hygroscopic automatic air vent
• Application: closed hydronic heating and cooling systems
• Installation location: radiator, collector, manifold or similar points
• Material: corrosion-resistant components suitable for system fluids

How to use

Install the air vent vertically at a high point of the circuit or on the radiator/collector following standard plumbing practice. Ensure the O-ring is seated correctly and tighten to the manufacturer's recommended torque to prevent leaks while avoiding over-tightening. Once fitted, the vent operates automatically: hygroscopic elements respond to moisture and trapped air, opening the passage to release air without manual bleeding. Regular system checks are advised to confirm normal operation and to inspect for external leaks.

Usage recommendations

Place the vent at the highest practical point of the system and in accessible positions for periodic inspection. Avoid placing the device where water hammer or heavy vibration occurs. Use compatible sealing materials when replacing the O-ring and follow system manufacturer guidelines for pressure and temperature limits to ensure reliable service life.