Copper tubing is most often used for the supply of hot and cold tap water, and as a refrigerant line in HVAC systems.
Coopper Tubing Size (CTS) | |||||||
Normal Size | Outside Diameter(OD) [in (mm)] | Inside Diameter(ID) [in mm] | Wall Thickness [in mm] | ||||
Type K | Type L | Type M | Type K | Type L | Type M | ||
1/4 | 3/8 | 0.305 | 0.315 | - | 0.035 | 0.030 | - |
3/8 | 1/2 | 0.402 | 0.430 | 0.450 | 0.049 | 0.035 | 0.025 |
1/2 | 5/8 | 0.527 | 0.545 | 0.569 | 0.049 | 0.040 | 0.028 |
5/8 | 3/4 | 0.652 | 0.666 | - | 0.049 | 0.045 | -0.032 |
3/4 | 7/8 | 0.745 | 0.785 | 0.811 | 0.065 | 0.050 | 0.035 |
1 | 1 1/8 | 0.995 | 1.025 | 1.055 | 0.065 | 0.055 | 0.042 |
1 /1/4 | 1 3/8 | 1.245 | 1.265 | 1.291 | 0.065 | 0.060 | 0.049 |
1 1/2 | 1 5/8 | 1.481 | 1.505 | 1.527 | 0.072 | 0.070 | 0.058 |
2 | 2 1/8 | 1.959 | 1.985 | 2.099 | 0.083 | 0.080 | 0.065 |
2 1/2 | 2 5/8 | 2.435 | 2.465 | 2.945 | 0.095 | 0.090 | 0.072 |
3 | 3 1/8 | 2.907 | 2.945 | 2.981 | 0.109 | 0.100 | 0.083 |
*K, thick walled, underground residential, commercial and industrial uses. **L, medium walled, residential and commercial uses ***M, thin walled, above ground residential and light commercial uses. |