Page 669 - 2018_IRC

WATER SUPPLY AND DISTRIBUTION

TABLE P2904.6.2(4)
3
ALLOWABLE PIPE LENGTH FOR / -INCH TYPE M COPPER WATER TUBING
4
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 / 4 217 289 361 434 506 578 650 723 795 867
9 3 / 4 174 232 291 349 407 465 523 581 639 697
10 3 / 4 143 191 239 287 335 383 430 478 526 574
11 3 / 4 120 160 200 241 281 321 361 401 441 481
12 3 / 4 102 137 171 205 239 273 307 341 375 410
13 3 / 4 88 118 147 177 206 235 265 294 324 353
14 3 / 4 77 103 128 154 180 205 231 257 282 308
15 3 / 4 68 90 113 136 158 181 203 226 248 271
16 3 / 4 60 80 100 120 140 160 180 200 220 241
17 3 / 4 54 72 90 108 125 143 161 179 197 215
18 3 / 4 48 64 81 97 113 129 145 161 177 193
19 3 / 4 44 58 73 88 102 117 131 146 160 175
20 3 / 4 40 53 66 80 93 106 119 133 146 159
21 3 / 4 36 48 61 73 85 97 109 121 133 145
22 3 / 4 33 44 56 67 78 89 100 111 122 133
23 3 / 4 31 41 51 61 72 82 92 102 113 123
24 3 / 4 28 38 47 57 66 76 85 95 104 114
25 3 / 4 26 35 44 53 61 70 79 88 97 105
26 3 / 4 24 33 41 49 57 65 73 82 90 98
27 3 / 4 23 30 38 46 53 61 69 76 84 91
28 3 / 4 21 28 36 43 50 57 64 71 78 85
29 3 / 4 20 27 33 40 47 53 60 67 73 80
30 3 / 4 19 25 31 38 44 50 56 63 69 75
31 3 / 4 18 24 29 35 41 47 53 59 65 71
32 3 / 4 17 22 28 33 39 44 50 56 61 67
33 3 / 4 16 21 26 32 37 42 47 53 58 63
34 3 / 4 NP 20 25 30 35 40 45 50 55 60
35 3 / 4 NP 19 24 28 33 38 42 47 52 57
36 3 / 4 NP 18 22 27 31 36 40 45 49 54
37 3 / 4 NP 17 21 26 30 34 38 43 47 51
38 3 / 4 NP 16 20 24 28 32 36 40 45 49
39 3 / 4 NP 15 19 23 27 31 35 39 42 46
40 3 / 4 NP NP 18 22 26 29 33 37 40 44

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.
NP = Not Permitted.
a. Flow rate from Section P2904.4.2.

644 2018 INTERNATIONAL RESIDENTIAL CODE ®
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