Imperial Sizes
Metric Sizes
Nominal Bore
(ins)
Pipe Outside
Diameter (mm)
1/4
12
3/8
16
1/2
20
3/4
25
1
32
1 1/4
40
1 1/2
50
2
63
2 1/2
75
3
90
4
110
5
140
6
160
8
225