2.5″ Valve x 2.5″ Pipe Weld Flange 500185 Easily add a 2.5″ valve flange to 2.5″ SCH 10 or 40 pipe. Fits both Akron® and Elkhart® valves. Part No. 500185 Description 2.5" Valve x 2.5" Pipe Weld Flange Material Stainless Steel