JG Underfloor Heating Air Vent automatically discharges any air that may build up within the underfloor heating (UFH) system to eliminate any cold spots within the floor. An alternative solution to manual bleed valves, the integral float automatically drops to allow any air to be vented from the top of the valve. The vent is easy to install as it simply screws directly into the JG Underfloor Manifold. Integral float automatically releases air Durable DZR brass with a nickel plate finish Suitable for underfloor heating applications only