Watts FV-4M1 Automatic Air Vent Valve, 1/4 Inch, Female NPT Connections, Brass Body and Air Vent with a Silicon Rubber Seal, Polyethylene Float with Valve Plug and Automatic Vent

AIR VENT VALVE: The Watts FV-4 Series automatic air vent valve is used in commercial and residential hydronic heating applications to provide automatic air venting for hot or cold water distribution systems.

HIGH TEMP RATING: Our automatic air vent valve is ideal for use with glycol systems or for use as an anti-vacuum device. It can also be installed to permit the separation and dispersal of air while fluid is circulating in the system.

COMPREHENSIVE FEATURES: It features a 1/4" bottom tap as well as a 1/4" NPT male threaded inlet. Pressure rated to 150 PSI (10 bar) at the maximum temperature of 240 F (116 C). It can be disassembled for inspection and cleaning.

DURABLE CONSTRUCTION: The brass construction ensures long-lasting, reliable performance in light commercial and residential hydronic heating applications. The float is high temperature resistant polyethylene.

EVERY DROP COUNTS: Water. It's in our name and close to our hearts. Since 1874, Watts Water Technologies has been delivering innovative technologies that make the world's most precious resource safe and accessible. Everything we design is made to keep the Earth's most precious resource safer, cleaner, and more useful for our customers. Our family of brands offers one of the most varied product lines in the world, with world-class, water-related solutions.