Purging & Filling Hydronic Systems
Bob Hot Rod Rohr, Caleffi Education manager, reviews the steps needed to properly purge and fill a hydronic system. Several products used for purging and filling are reviewed including their tradeoffs. He address system cleaning and options available, the role of water quality, importance of adequate flow velocity for good air removal, pressure setting and the role of the expansion tank, and the role of the backflow preventer.