Review on EZ Flow 20378 Air Valve Radiator Angle, 1/8 Inch by Adam Webbie

I have steam heating and adjustable Hoffman vents on all my radiators. Recently, one of Hoffman's vents began failing, resulting in a constant "hiss" of air rather than short bursts. I found these adjustable vents from Ez-Flo and the price was right so I bought 2. Happy to say they work great! When the cooler warms up, there is no constant "hissing" but only short bursts of air as the pressure builds up. I am very happy with it. They are easy to set up and do what they are supposed to do.