2.5 FNH x 2.5 MNH w/air bleeder The new Model 105A High-Rise Elbow is lightweight and compact with an integrated Model 114 drain valve to help relieve pressure from your current high-rise set up. It features a standard NH thread and knurled edge coupling for tight Class 1 or Class 3 hose cabinets. The 45-degree elbow all but eliminates hose kinking from the standpipe valve.