The brass boiler feed and dual check backflow preventer with atmospheric vent is available as a combination unit, or the boiler feed valve and backflow preventer are sold separately.
For hydronic heating systems, the combination unit prevents heating system water from flowing back into the supply water piping if supply pressure falls below heating system pressure. It also offers pressure setting adjustment between 10 and 25 psi.
The combination valve comes in ½-inch cast iron union sweat or union NPT feed valve with a brass backflow and a ½-inch and ¾-inch brass union sweat or union NPT feed valve with a brass backflow. The backflow preventer is available in ½-inch and ¾-inch union sweat or union NPT.
Taco Comfort Solutions