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
