Black Cast-Iron Threaded Pipe Fittings—Class 125 • Max. pressure: 175 psi WOG; 125 psi saturated steam Temp. range: -20° to 150°FDesigned for use in fire protection applications. Sizes 1/4" to 4" NPS are included in the “List of Inspected Fire Protection Equipment and Materials” issued by the Underwriters’ Laboratories, Inc. NPT threads.UL Listed; FM Approved; meet ASME B16.4. Reducing Tee, 1-1/2x1-1/4x1 In.