Buying Guide

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®
Revised 4/26/2019
CPVC-CTS Tube Dimensions
Outside Diameter, Wall Thickness, and Tolerances for CPVC
4120, SDR 11 Plastic Tubing per ASTM D2846
Tube and Fittings
Dimensions and Pressure Ratings
NIBCO
®
CPVC-CTS fittings are manufactured to the material
and dimensional requirements of ASTM D2846. Each product
can be easily identified by the tan color. The outside diameter
of the tube has the same dimension as the equivalent size cop-
per tube; therefore, the product line is referred to as CPVC-CTS
(Copper Tube Size).
The tube meets the dimensional requirements of SDR-11
(Standard Dimension Ratio). Through the ratio of tube O.D.-to-
wall thickness, SDR design maintains the same pressure rating
regardless of size . Tube and fitting dimensions are shown in
inches.
Nominal Average Tolerance on Average Wall Tolerance
Size Tubing O.D. Average O.D. Tubing I.D. Thickness on Wall
1/2 0.625 ±0.003 0.489 0.060 +0.020
3/4 0.875 ±0.003 0.715 0.080 +0.020
1 1.125 ±0.003 0.921 0.102 +0.020
1
1
/4 1.375 ±0.003 1.125 0.125 +0.020
1
1
/2 1.625 ±0.004 1.329 0.148 +0.020
2 2.125 ±0.004 1.739 0.193 +0.023
Nominal Socket Entrance Dia., A Socket Bottom Dia., B C D WA W
B
F
Size Average Tolerance Average Tolerance Min. Min. Min. Min. Min.
1/2 0.633 ±0.003 0.619 ±0.003 0.500 0.489 0.068 0.102 0.128
3/4 0.884 ±0.003 0.870 ±0.003 0.700 0.715 0.080 0.102 0.128
1 1.135 ±0.003 1.121 ±0.003 0.900 0.921 0.102 0.102 0.128
1
1
/4 1.386 ±0.003 1.372 ±0.003 1.100 1.125 0.125 0.125 0.156
1
1
/2 1.640 ±0.004 1.622 ±0.004 1.300 1.329 0.148 0.148 0.185
2 2.141 ±0.004 2.123 ±0.004 1.700 1.739 0.193 0.193 0.241
CPVC-CTS Copper Tube Size (SDR 11)
NOTE: NIBCO recommends the use of proper transition fittings when joining plastic to metal threaded fittings or pipe.
Fitting Dimensions