1/2" Bronze Combination Fill Valve And Backflow Preventer
For use in commercial and residential hydronic heating systems to provide make-up water to the boiler, and prevent backflow when supply pressure falls below system pressure
It consists of a bronze backflow preventer, model 9D and a bronze feed water pressure regulator, model 1156F, in one pre-assembled unit
High capacity fill valve provides quick system filling and purging
