Page 671 - 2018_IRC

WATER SUPPLY AND DISTRIBUTION

TABLE P2904.6.2(6)
ALLOWABLE PIPE LENGTH FOR / 4 -INCH CPVC PIPE
3
AVAILABLE PRESSURE—P t (psi)
SPRINKLER WATER
a
FLOW RATE DISTRIBUTION 15 20 25 30 35 40 45 50 55 60
(gpm) SIZE (inch)
Allowable length of pipe from service valve to farthest sprinkler (feet)
8 3 / 348 465 581 697 813 929 1045 1161 1278 1394
4
9 3 / 280 374 467 560 654 747 841 934 1027 1121
4
10 3 / 231 307 384 461 538 615 692 769 845 922
4
11 3 / 193 258 322 387 451 515 580 644 709 773
4
12 3 / 165 219 274 329 384 439 494 549 603 658
4
13 3 / 142 189 237 284 331 378 426 473 520 568
4
14 3 / 124 165 206 247 289 330 371 412 454 495
4
15 3 / 109 145 182 218 254 290 327 363 399 436
4
16 3 / 97 129 161 193 226 258 290 322 354 387
4
17 3 / 86 115 144 173 202 230 259 288 317 346
4
18 3 / 78 104 130 155 181 207 233 259 285 311
4
19 3 / 70 94 117 141 164 188 211 234 258 281
4
20 3 / 4 64 85 107 128 149 171 192 213 235 256
21 3 / 58 78 97 117 136 156 175 195 214 234
4
22 3 / 54 71 89 107 125 143 161 179 197 214
4
23 3 / 4 49 66 82 99 115 132 148 165 181 198
24 3 / 46 61 76 91 107 122 137 152 167 183
4
25 3 / 42 56 71 85 99 113 127 141 155 169
4
26 3 / 4 39 52 66 79 92 105 118 131 144 157
27 3 / 37 49 61 73 86 98 110 122 135 147
4
28 3 / 34 46 57 69 80 92 103 114 126 137
4
29 3 / 4 32 43 54 64 75 86 96 107 118 129
30 3 / 30 40 50 60 70 81 91 101 111 121
4
31 3 / 28 38 47 57 66 76 85 95 104 114
4
32 3 / 4 27 36 45 54 63 71 80 89 98 107
33 3 / 25 34 42 51 59 68 76 84 93 101
4
34 3 / 24 32 40 48 56 64 72 80 88 96
4
35 3 / 4 23 30 38 45 53 61 68 76 83 91
36 3 / 22 29 36 43 50 57 65 72 79 86
4
37 3 / 20 27 34 41 48 55 61 68 75 82
4
38 3 / 4 20 26 33 39 46 52 59 65 72 78
39 3 / 19 25 31 37 43 50 56 62 68 74
4
40 3 / 18 24 30 35 41 47 53 59 65 71
4
For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square inch = 6.895 kPa, 1 gallon per minute = 0.963 L/s.
a. Flow rate from Section P2904.4.2.

646 2018 INTERNATIONAL RESIDENTIAL CODE ®
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