“After spending several days of trying to bleed all of the air out of my system using manual bleeders and having little luck, I purchased several of these and actually only had to install one of them --- on the highest/farthest radiator. Works like a charm. Except for the nylon-like valve stem body, the entire unit is very substantially made and much better built than other units of this type. And it's NOT made in China!”
“Good product for removing air from hot water heating system. Durability may be an issue as sometimes they will stick and fail to remove air. But overall it work well and doesn’t let water spray out everywhere”
