The damper makes it possible to completely cut off one of the air sources and redirect it to the other circuit. Metal T Piece with Throttle / Damper The damper makes it possible to completely cut off one of the air sources and redirect it to the other circuit Particularly useful in the branch that draws air into the recuperator, where there are two power sources: a wall hood and a GWC Replacement restores a tight connection between fuel lines. PATIKIL 6 Inch 3 Way Splitter T-Shaped Metal Manual Volume Damper for Vents Fans Extractors Stove Pipes Range Hoods HVAC Ventilation Systems in the Duct Parts department at Stove Pipe Tee Connector Galvanized Steel GI Duct Damper With Airfoil Blade - Manual Volume Ducting Pipe Tee With Damper Specifications: Easy to install Ducting Material: Tee Connector, Metal, Coupler, and Coupling. Fire damper frame automatic production line-T shape Easy installation, simplify installation steps, no modification, cutting, or drilling required. 3 way hose connector can be used to connect air, water, gas, oil, fuel and other fluids.