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CTS - Copper Tube Sizes - Dimensions used in Plumbing

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Note that CTS - Copper Tube Sizes - are also used for other plumbing materials like CPVC tubes.

CTS - Copper Tubing Sizes used in Plumbing
Nominal
size		Outside diameter
OD		Inside diameter ID
inmmType KType LType M
inmminmminmm
​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
1​1⁄4 1 3⁄8 34.925 1.245 31.623 1.265 32.131 1.291 32.791
1​1⁄2 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
2​1⁄2 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.

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Related Topics

• Dimensions

Sizes and dimensions of pipes and tubes, and their fittings - inside and outside diameter, weight 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.

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