1-1/4" Sweat Run x 1" Hydro-Core Right Flange Manifold w/ 3/4" Sweat Union ConnectionTo Identify which Hydro-Core Manifold is appropriate for your application, please check the Boiler Compatibility Chart under the "manuals" tab. Information you will need is Boiler Manufacturer, Boiler Model, System Run Size, & Desired Configuration.
Note: This product is compatible with the following Lochinvar boiler: