Watts 0590719 Capacity Air Vents with Manual Vent 1/8" DUO-VENT-NPT

Watts Series DuoVent High Capacity Air Vents with Manual Vent Feature Series DuoVent high capacity air vents with manual vent feature provide automatic air venting for hot or cold water distribution systems. The manual vent feature provides tremendous air elimination capability for lightening fast venting of residential and commercial systems. The DuoVent valve utilizes a float to actuate the valve plug which is located at the top of the valve. Once the air is displaced and the system pressure is sustained, the valve plug seals and prevents any water from escaping from the system. The float vent can also operate as an anti-vacuum device since it will permit air to enter the system when it must be drained. FEATURES:   Body and cover are brass construction Air vent with silicone rubber seal Impurities do not usually affect function as maximum float line of water is always lower than the valve seal Float is high temperature resistant polyethylene • Suitable for use with glycol systems