Rated Internal Working Pressure for Copper Tube: DWV*

Nominal or standard size, in inches Annealed*** Drawn**
S= 6000 psi 100F S= 5100 psi 150F S= 4900 psi 200F S= 4800 psi 250F S= 4700 psi 300F S= 4000 psi 350F S= 3000 psi 400F S= 10,300 psi 100F S= 10,300 psi 150F S= 10,300 psi 200F S= 10,300 psi 250F S= 10,000 psi 300F S= 9,700 psi 350F S= 9,400 psi 400F
1¼ 330 280 269 264 258 220 165 566 566 566 566 549 533 516
1½ 293 249 240 235 230 196 147 503 503 503 503 489 474 459
2 217 185 178 174 170 145 109 373 373 373 373 362 352 341
3 159 135 130 127 125 106 80 273 273 273 273 265 257 249
4 150 127 122 120 117 100 75 257 257 257 257 250 242 235
5 151 129 124 121 119 101 76 260 260 260 260 252 245 237
6 148 126 121 119 116 99 74 255 255 255 255 247 240 232
8 146 124 119 117 114 97 73 251 251 251 251 244 236 229
* Based on maximum allowable stress in tension (psi) for the indicated temperatures (F).
** When brazing or welding is used to join drawn tube, the corresponding annealed rating must be used.
*** Types M and DWV are not normally available in the annealed temper. Shaded values are provided for guidance when drawn temper tube is brazed or welded. For more information, see Pressure Ratings and Burst Strength.