The Duff Norton 750116C 1-1/4" Stainless Steel Rotary Union is a durable fluid-transfer component designed to connect stationary piping to rotating equipment while maintaining a sealed flow path. Its precision sealing and bearing arrangement allow water, steam, air, or hot oil to pass through during continuous right-hand rotation, helping minimize leakage and wear. In HVAC application... https://www.partshnc.com/duff-norton-750116c-stainless-steel-rotary-union-1-1-4