Barnes & Jones 3856 Vacuum Breaker

The Barnes & Jones 3856 Vacuum Breaker delivers reliable backflow protection for steam boilers and heating systems. This vacuum breaker uses a Type O-Ring and Spring pressure design, featuring a brass body and a silicon disc for durability in demanding environments.

Key specs include Nominal Size 2-3/8 inch, End Connection 1/2 inch threaded, and Outlet Sizes 0.75 inch (bottom) and 1.25 inch (top). The assembly uses Stainless Steel for the spring/valve and Silicon for the seat, delivering dependable performance up to 350°F and 125 PSIG.

• Brass body with silicone disc for corrosion resistance
• Type O-Ring and Spring pressure design
• End connection: 1/2" threaded; outlets: bottom 0.75" / top 1.25"
• Nominal size: 2-3/8"; spring size: 0.3"
• Temperature rating: 350°F; Pressure rating: 125 PSIG

Ideal for use on air heat coils, steam boilers, shell and tube heat exchangers, makeup air coils, jacketed kettles, and steam mains - providing reliable protection across industrial and commercial heating systems.