Navien NR-180A, Operation & Installation Manual

Page: 29 / 89

INSTALLATION
29
Gas Pipe Sizing Chart:
Referenced from Uniform Plumbing Code 1997
3/4" 363 249 200 171 152 138 127 118 111 104 93
1" 684 470 377 323 286 259 239 222 208 197 174
1 1/4" 1,404 965 775 663 588 532 490 456 428 404 358
1 1/2" 2,103 1,445 1,161 993 880 798 734 683 641 605 536
2" 4,050 2,784 2,235 1,913 1,696 1,536 1,413 1,315 1,234 1,165 1,033
2 1/2" 6,455 4,437 3,563 3,049 2,703 2,449 2,253 2,096 1,966 1,857 1,646
3" 11,412 7,843 6,299 5,391 4,778 4,329 3,983 3,705 3,476 3,284 2,910
3 1/2" 16,709 11,484 9,222 7,893 6,995 6,338 5,831 5,425 5,090 4,808 4,261
4" 23,277 15,998 12,847 10,995 9,745 8,830 8,123 7,557 7,091 6,698 5,936
3/4" 567 393 315 267 237 217 196 185 173 162 146 132 112
1" 1,071 732 590 504 448 409 378 346 322 307 275 252 213
1 1/4" 2,205 1,496 775 663 588 532 490 456 428 404 358 511 440
1 1/2" 3,307 2,299 1,161 993 880 798 734 683 641 605 536 787 675
2" 6,221 4,331 2,235 1,913 1,696 1,536 1,413 1,315 1,234 1,165 1,033 1,496 1,260
3/4" 206 147 121 105 94 86 80 75 71 67 55 48
1" 383 269 218 188 168 153 141 132 125 118 94 82
1 1/4" 614 418 334 284 251 227 209 194 181 171 137 116
1 1/2" 1,261 888 723 625 559 509 471 440 415 393 320 277
2" 2,934 2,078 1,698 1,472 1,317 1,203 1,114 1,042 983 933 762 661
3/4" 325 232 191 166 149 136 126 118 112 106 87 76
1" 605 425 344 297 265 241 222 208 197 186 143 129
1 1/4" 971 661 528 449 397 359 330 307 286 270 217 183
1 1/2" 1,993 1,404 1,143 988 884 805 745 696 656 621 506 438
2" 4,638 3,285 2,684 2,327 2,082 1,902 1,761 1,647 1,554 1,475 1,205 1,045