Reducer Nom. Pipe Size mm Dia. Nominal H Nom. Pipe Size Dia. Nominal H Nom. Pipe Size Dia. Nominal H Lg. End sm. End Lg. End sm. End Lg. End sm. End 20 10 38 90 32 102 250 100 178 15 38 40 102 125 178 25 10 51 50 102 150 178 15 51 65 102 200 178 20 51 80 102 300 125 203 32 15 51 100 40 102 150 203 20 51 50 102 200 203 25 51 65 102 250 203 40 15 64 80 102 350 150 330 20 64 90 102 200 330 25 64 125 50 127 250 330 32 64 65 127 300 330 50 20 76 80 127 400 200 356 25 76 90 127 250 356 32 76 100 127 300 356 40 76 150 65 140 350 356 65 25 89 80 140 450 250 381 32 89 90 140 300 381 40 89 100 140 350 381 50 89 125 140 400 381 80 32 89 200 90 152 500 300 508 40 89 100 152 350 508 50 89 125 152 400 508 65 89 150 152 450 508