“Between a faulty auto-fill valve and air vent, my second floor radiators would become air-locked. Replaced both and now I'm staying nice and warm! This is one of those preventative maintenance items you should replace every couple/few years.”
“I've used several kinds of air vent in hydronic heating systems. Most don't pass the test of time , they get corroded or scaled up and either leak or won't vent but these guys keep working for years and years. These are the only kind I'll use.”
“Very high quality. Easy to install. Huge difference comparing to the old fashion air vents. My appliance is very low pressure (12 psi - water-based home heating system), and air vents often do not work, but this one does the job perfectly.”
“The first one they sent me was the version that's two generations old, with a more complex mechanism inside that has reliability problems. Even though I installed it carefully and bought the pressure (12psi) up very gradually by pumping up the expansion tank with a bike pump, it leaked water out the vent hole continuously. The vendor (Standard Plumbing Supply) replaced it with the latest version at no charge, no questions asked. Gotta love 'em.”
