All dimensions are in "mm" unless noted otherwise.
Reducing Tee dimensions are as per ASME B16.9.

Reducing Tee Dimensions

Nominal Pipe
Size (NPS)		 Outside Diameter at Bevel Center-to-End Dimensions
Run
D1		 Outlet
D2		 Run
C		 Outlet
M
1/2 x 3/8 21.3 17.3 25 25
1/2 x 1/4 21.3 13.7 25 25
3/4 x 1/2 26.7 21.3 29 29
3/4 x 3/8 26.7 17.3 29 29
1 x 3/4 33.4 26.7 38 38
1 x 1/2 33.4 21.3 38 38
1(1/4) x 1 42.2 33.4 48 48
1(1/4) x 3/4 42.2 26.7 48 48
1(1/4) x 1/2 42.2 21.3 48 48
1(1/2) x 1(1/4) 48.3 42.2 57 57
1(1/2) x 1 48.3 33.4 57 57
1(1/2) x 3/4 48.3 26.7 57 57
1(1/2) x 1/2 48.3 21.3 57 57
2 x 1(1/2) 60.3 48.3 64 60
2 x 1(1/4) 60.3 42.2 64 57
2 x 1 60.3 33.4 64 51
2 x 3/4 60.3 26.7 64 44
2(1/2) x 2 73 60.3 76 70
2(1/2) x 1(1/2) 73 48.3 76 67
2(1/2) x 1(1/4) 73 42.2 76 64
2(1/2) x 1 73 33.4 76 57
3 x 2(1/2) 88.9 73 86 83
3 x 2 88.9 60.3 86 76
3 x 1(1/2) 88.9 48.3 86 73
3 x 1(1/4) 88.9 42.2 86 70
3(1/2) x 3 101.6 88.9 95 92
3(1/2) x 2(1/2) 101.6 73 95 89
3(1/2) x 2 101.6 60.3 95 83
3(1/2) x 1(1/2) 101.6 48.3 95 79
4 x 3(1/2) 114.3 101.6 105 102
4 x 3 114.3 88.9 105 98
4 x 2(1/2) 114.3 73.0 105 95
4 x 2 114.3 60.3 105 89
4 x 1(1/2) 114.3 48.3 105 86
5 x 4 141.3 114.3 124 117
5 x 3(1/2) 141.3 101.6 124 114
5 x 3 141.3 88.9 124 111
5 x 2(1/2) 141.3 73.0 124 108
5 x 2 141.3 60.3 124 105
6 x 5 168.3 141.3 143 137
6 x 4 168.3 114.3 143 130
6 x 3(1/2) 168.3 101.6 143 127
6 x 3 168.3 88.9 143 124
6 x 2(1/2) 168.3 73.0 143 121
8 x 6 219.1 168.3 178 168
8 x 5 219.1 141.3 178 162
8 x 4 219.1 114.3 178 156
8 x 3(1/2) 219.1 101.6 178 152
10 x 8 273.0 219.1 216 203
10 x 6 273.0 168.3 216 194
10 x 5 273.0 141.3 216 191
10 x 4 273.0 114.3 216 184
12 x 10 323.8 273.0 254 241
12 x 8 323.8 219.1 254 229
12 x 6 323.8 168.3 254 219
12 x 5 323.8 141.3 254 216
14 x 12 355.6 323.8 279 270
14 x 10 355.6 273.0 279 257
14 x 8 355.6 219.1 279 248
14 x 6 355.6 168.3 279 238
16 x 14 406.4 355.6 305 305
16 x 12 406.4 323.8 305 295
16 x 10 406.4 273.0 305 283
16 x 8 406.4 219.1 305 273
16 x 6 406.4 168.3 305 264
18 x 16 457 406.4 343 330
18 x 14 457 355.6 343 330
18 x 12 457 323.8 343 321
18 x 10 457 273.0 343 308
18 x 8 457 219.1 343 298
20 x 18 508 457 381 368
20 x 16 508 406.4 381 356
20 x 14 508 355.6 381 356
20 x 12 508 323.8 381 346
20 x 10 508 273.0 381 333
20 x 8 508 219.1 381 324
22 x 20 559 508 419 406
22 x 18 559 457 419 394
22 x 16 559 406.4 419 381
22 x 14 559 355.6 419 381
22 x 12 559 323.8 419 371
22 x 10 559 273.0 419 359
24 x 22 610 559 432 432
24 x 20 610 508 432 432
24 x 18 610 457 432 419
24 x 16 610 406.4 432 406
24 x 14 610 355.6 432 406
24 x 12 610 323.8 432 397
24 x 10 610 273.0 432 384
26 x 24 660 610 495 483
26 x 22 660 559 495 470
26 x 20 660 508 495 457
26 x 18 660 457 495 444
26 x 16 660 406.4 495 432
26 x 14 660 355.6 495 432
26 x 12 660 323.8 495 422
26 x 14 660 355.6 495 432
28 x 26 711 660 521 521
28 x 24 711 610 521 508
28 x 22 711 559 521 495
28 x 20 711 508 521 483
28 x 18 711 457 521 470
28 x 16 711 406.4 521 457
28 x 14 711 355.6 521 457
28 x 12 711 323.8 521 448
30 x 28 762 711 559 546
30 x 26 762 660 559 546
30 x 24 762 610 559 533
30 x 22 762 559 559 521
30 x 20 762 508 559 508
30 x 18 762 457 559 495
30 x 16 762 406.4 559 483
30 x 14 762 355.6 559 483
30 x 12 762 323.8 559 473
30 x 10 762 273.0 559 460
32 x 30 813 762 597 584
32 x 28 813 711 597 572
32 x 26 813 660 597 572
32 x 24 813 610 597 559
32 x 22 813 559 597 546
32 x 20 813 508 597 533
32 x 18 813 457 597 521
32 x 16 813 406.4 597 508
32 x 14 813 355.6 597 508
34 x 32 864 813 635 622
34 x 30 864 762 635 610
34 x 28 864 711 635 597
34 x 26 864 660 635 597
34 x 24 864 610 635 584
34 x 22 864 559 635 572
34 x 20 864 508 635 559
34 x 18 864 457 635 546
34 x 16 864 406.4 635 533
36 x 34 914 864 673 660
36 x 32 914 813 673 648
36 x 30 914 762 673 635
36 x 28 914 711 673 622
36 x 26 914 660 673 622
36 x 24 914 610 673 610
36 x 22 914 559 673 597
36 x 20 914 508 673 584
36 x 18 914 457 673 572
36 x 16 914 406.4 673 559
38 x 36 965 914 711 711
38 x 34 965 864 711 698
38 x 32 965 813 711 686
38 x 30 965 762 711 673
38 x 28 965 711 711 648
38 x 26 965 660 711 648
38 x 24 965 610 711 635
38 x 22 965 559 711 622
38 x 20 965 508 711 610
38 x 18 965 457 711 597
40 x 38 1016 965 749 749
40 x 36 1016 914 749 737
40 x 34 1016 864 749 724
40 x 32 1016 813 749 711
40 x 30 1016 762 749 698
40 x 28 1016 711 749 673
40 x 26 1016 660 749 673
40 x 24 1016 610 749 660
40 x 22 1016 559 749 648
40 x 20 1016 508 749 635
40 x 18 1016 457 749 622
42 x 40 1067 1016 762 711
42 x 38 1067 968 762 711
42 x 36 1067 914 762 711
42 x 34 1067 864 762 711
42 x 32 1067 813 762 711
42 x 30 1067 762 762 711
42 x 28 1067 711 762 698
42 x 26 1067 660 762 698
42 x 24 1067 610 762 660
42 x 22 1067 559 762 660
42 x 20 1067 508 762 660
42 x 18 1067 457 762 648
42 x 16 1067 406.4 762 635
44 x 42 1118 1067 813 762
44 x 40 1118 1016 813 749
44 x 38 1118 965 813 737
44 x 36 1118 914 813 724
44 x 34 1118 864 813 724
44 x 32 1118 813 813 711
44 x 30 1118 762 813 711
44 x 28 1118 711 813 698
44 x 26 1118 660 813 698
44 x 24 1118 610 813 698
44 x 22 1118 559 813 686
44 x 20 1118 508 813 686
46 x 44 1168 1118 851 800
46 x 42 1168 1067 851 787
46 x 40 1168 1016 851 775
46 x 38 1168 965 851 762
46 x 36 1168 914 851 762
46 x 34 1168 864 851 749
46 x 32 1168 813 851 749
46 x 30 1168 762 851 737
46 x 28 1168 711 851 737
46 x 26 1168 660 851 737
46 x 24 1168 610 851 724
46 x 22 1168 559 851 724
48 x 46 1219 1168 889 838
48 x 44 1219 1118 889 838
48 x 42 1219 1067 889 813
48 x 40 1219 1016 889 813
48 x 38 1219 965 889 813
48 x 36 1219 914 889 787
48 x 34 1219 864 889 787
48 x 32 1219 813 889 787
48 x 30 1219 762 889 762
48 x 28 1219 711 889 762
48 x 26 1219 660 889 762
48 x 24 1219 610 889 737
48 x 22 1219 559 889 737
Piping Topic: Tee and Reducing Tee Dimensions
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