This section is from the book "The Building Trades Pocketbook", by International Correspondence Schools. Also available from Amazon: Building Trades Pocketbook: a Handy Manual of reference on Building Construction.
Size of Pipe. Inches. | Vertical Pipe. | Horizontal Pipe. | ||
Hot. Inches. | Cold. Inches. | Hot. Inches. | Cold. Inches. | |
3/8 | 18 | 24 | 12 | 16 |
1/2 | 19 | 25 | 14 | 17 |
5/8 | 20 | 26 | 15 | 18 |
3/4 | 21 | 27 | 16 | 19 |
1 | 22 | 28 | 17 | 20 |
1 1/4 | 23 | 29 | 18 | 21 |
1 1/2 | 24 | 30 | 18 | 22 |
Tacks are spaced closer on hot than on cold pipes, as lead is much more liable to sag when heated.
Diameter of Pipe. Inches. | Length of Joint. Inches. |
1/2 | 2 1/8 |
5/8 | 2 1/4 |
3/4 | 2 1/2 |
1 | 2 3/4 |
Diameter of Pipe. Inches. | Length of Joint. Inches. |
1 1/4 water | 3 |
l 1/4 waste | 2 |
1 1/2 water | 3 1/4 |
1 1/2 waste | 2 1/4 |
Diameter of Pipe. Inches. | Length of Joint. Inches. |
2 waste | 2 1/4 |
2 1/2 waste | 2 1/2 |
3 waste | 2 1/2 |
4 waste | 3 |
 
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