Here are 3 brand new/unused Taco Comfort Solutions 4900 series 3/4" brass inline air Separators. These premium commercial grade Separators use patented PALL ring technology to completely eliminate micro bubbles and dirt from closed loop hydronic heating and cooling systems. Protecting pumps and eliminating pipe noise .perfect for boiler installations or hydronic system upgrades. Max Pressure : 150 PSI Max Temp : 240°F willing to sell individually for $90 or bundle all three for a discount of $240 . Message me if interested thank you