CTS - Copper Tube Sizes - Dimensions used in Plumbing
Note that CTS - Copper Tube Sizes - are also used for other plumbing materials like CPVC tubes.
| Nominal size | Outside diameter OD | Inside diameter ID | ||||||
|---|---|---|---|---|---|---|---|---|
| in | mm | Type K | Type L | Type M | ||||
| in | mm | in | mm | in | mm | |||
| 1⁄4 | 3⁄8 | 9.5 | 0.305 | 7.747 | 0.315 | 8.001 | ||
| 3⁄8 | 1⁄2 | 12.7 | 0.402 | 10.211 | 0.430 | 10.922 | 0.450 | 11.430 |
| 1⁄2 | 5⁄8 | 15.875 | 0.528 | 13.411 | 0.545 | 13.843 | 0.569 | 14.453 |
| 5⁄8 | 3⁄4 | 19.05 | 0.652 | 16.561 | 0.668 | 16.967 | 0.690 | 17.526 |
| 3⁄4 | 7⁄8 | 22.225 | 0.745 | 18.923 | 0.785 | 19.939 | 0.811 | 20.599 |
| 1 | 1 1⁄8 | 28.575 | 0.995 | 25.273 | 1.025 | 26.035 | 1.055 | 26.797 |
| 11⁄4 | 1 3⁄8 | 34.925 | 1.245 | 31.623 | 1.265 | 32.131 | 1.291 | 32.791 |
| 11⁄2 | 1 5⁄8 | 41.275 | 1.481 | 37.617 | 1.505 | 38.227 | 1.527 | 38.786 |
| 2 | 2 1⁄8 | 53.975 | 1.959 | 49.759 | 1.985 | 50.419 | 2.009 | 51.029 |
| 21⁄2 | 2 5⁄8 | 66.675 | 2.435 | 61.849 | 2.465 | 62.611 | 2.495 | 63.373 |
| 3 | 3 1⁄8 | 79.375 | 2.907 | 73.838 | 2.945 | 74.803 | 2.981 | 75.717 |
Wall-thicknesses used for plumbing in the U.S. and Canada are the CTS - Copper Tube Sizes - Type K, L and M.
In Europe the wall-thicknesses used are based on BS 2871 Copper Tubes Type X, Y and Z / EN 1057 Copper and copper alloys. Seamless, round copper tubes for water and gas in sanitary and heating applications.
Note that CPVC pipes in schedule 40 and 80 also are delivered in NPS sizes.
Related Topics
• Dimensions of Pipes and Tubes
Pipe, tube and fittings sizes and dimensions. Inside and outside diameters, weights and more.
Related Documents
ASTM D1785 and ASTM F441 - PVC and CPVC Pipes Schedule 40 & 80
Standard dimensions and weight of PVC - Polyvinyl Chloride - and CPVC - Chlorinated Polyvinyl Chloride.
ASTM D2846 - CPVC Plastic Hot and Cold Water Distribution Tubes - Dimensions
Dimensions of CTS - Copper Tube Sized CPVC (Chlorinated Poly Vinyl Chloride) tubes.
BS 2871 Copper Tubes Table X, Y and Z - Working Pressures vs. Size
Working pressures of metric sized copper tubes according the BS (British Standard) 2871.
CPVC Tubes - Pressure and Temperature Ratings
CTS (Copper Tube Sized) CPVC (Chlorinated Poly Vinyl Chloride) tubes temperature and pressure ratings.
CTS (Copper Tube Sized) and CPVC Tubes - Friction Loss vs. Water Flow
Volume flow and pressure loss in CTS - Copper Tube Sized CPVC (Chlorinated Poly Vinyl Chloride) tubes.
EN 1057 Copper Tubes for Water and Gas in Sanitary and Heating Applications - Dimensions
Dimensions of EN 1057 Copper and copper alloys - Seamless, round copper tubes for water and gas in sanitary and heating applications.
EN 12449 - Copper and Copper Alloys - Seamless, Round Tubes for General Purposes - Dimensions
Dimensions of copper tubes according EN 12449.