User Guide

Plumbing Design Assistance Manual l Chapter 4 – Pipe sizing l 47
NPCC table A-2.6.3.1(2)A
Tables taken from NPCC
Addition of 3.65 m/s (12 fps) flow velocity to Table A-2.6.3.1.(2)A of the National Plumbing Code of Canada, 2010
Current Table A-2.6.3.1.(2)A, Pressure Range 200-310 kPa
Water
Service
Pipe
Size
Water
Distribution
PipeSize
MaximumAllowableLength,meters
12 18 24 30 46 61 76 91 122 152 183 213 244 274 305
NumberofFixtureUnitsServed
in. in. FlowVelocity,m/s: 3.0
2.4 1.5
PressureRange 200 to 310 kPa
3/4 1/2
6 5 4 3 2 1 0 0 0 0 0 0 0 0 0
3/4 5/8 12
10 9 7 5 3 3 3 2 2 1 1 1 1 0
3/4 3/4 18
16 14 12 9 6 5 5 4 4 3 2 2 2 1
1 1 36 31
27 25 20 17 15 13 12 10 8 6 6 6 6
11/2 11/4 83 68 57
48 38 32 28 25 21 18 15 12 12 11 11
11/2 11/2 151 124 105
91 70 57 49 45 36 31 26 23 21 20 20
2 11/2 151 151 132 110
80 64 53 46 38 32 27 23 21 20 20
2 2 359 329 292 265
217 185 164 147 124 96 70 61 57 54 51
21/2 21/2
445 418 390 370 330 300 280 265 240 220 198 175 158 143 133
Modified Table A-2.6.3.1.(2)A, Pressure Range 200-310 kPa
Water
Service
Pipe
Size
Water
Distribution
PipeSize
MaximumAllowableLength,meters
12 18 24 30 46 61 76 91 122 152 183 213 244 274 305
NumberofFixtureUnitsServed
in. in. FlowVelocity,m/s: 3.65 3.0 2.4 1.5
PressureRange 200 to 310 kPa
3/4 1/2 6 5 4 3 2 1 0 0 0 0 0 0 0 0 0
3/4 5/8 12 10 9 7 5 3 3 3 2 2 1 1 1 1 0
3/4 3/4 18 16 14 12 9 6 5 5 4 4 3 2 2 2 1
1 1 42 31 27 25 20 17 15 13 12 10 8 6 6 6 6
11/2 11/4 89 68 57 48 38 32 28 25 21 18 15 12 12 11 11
11/2 11/2 163 125 105 91 70 57 49 45 36 31 26 23 21 20 20
2 11/2 194 159 132 110 80 64 53 46 38 32 27 23 21 20 20
2 2 465 357 295 265 217 185 164 147 124 96 70 61 57 54 51
21/2 21/2 510 439 395 370 330 300 280 265 240 220 198 175 158 143 133
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Current Table A-2.6.3.1.(2)A, Pressure Range 311-413 kPa
Water
Service
Pipe
Size
Water
Distribution
PipeSize
MaximumAllowableLength,meters
12 18 24 30 46 61 76 91 122 152 183 213 244 274 305
NumberofFixtureUnitsServed
in. in. FlowVelocity,m/s: 3.0
2.4 1.5
PressureRange 311 to 413 kPa
3/4 ½ 8 7
6 5 4 3 2 2 1 1 1 0 0 0 0
3/4 5/8 13 13 12
11 9 7 5 5 3 3 2 2 1 1 1
3/4 ¾ 21 21 19 17
14 11 9 8 6 5 4 4 3 3 3
1 1 42 42 41 36
30 25 23 20 18 15 12 10 9 8 8
11/2 11/4 83 83 83 83 66
52 44 39 33 29 24 20 19 17 16
11/2 11/2 151 151 151 151 128 105
90 78 62 52 42 38 35 32 30
2 11/2 151 151 151 151 150 117
98 84 67 55 42 38 35 32 30
2 2 359 359 359 359 359 318 280
250 205 165 142 123 110 102 94
21/2 21/2 611 611 610 580 535 500 470
440 400 365 335 315 285 267 250
Modified Table A-2.6.3.1.(2)A, Pressure Range 311-413 kPa
Water
Service
Pipe
Size
Water
Distribution
PipeSize
MaximumAllowableLength,meters
12 18 24 30 46 61 76 91 122 152 183 213 244 274 305
NumberofFixtureUnitsServed
in. in. FlowVelocity,m/s: 3.65 3.0 2.4 1.5
PressureRange 311 to 413 kPa
3/4 ½ 10 7 6 5 4 3 2 2 1 1 1 0 0 0 0
3/4 5/8 19 18 14 11 9 7 5 5 3 3 2 2 1 1 1
3/4 ¾ 30 25 20 17 14 11 9 8 6 5 4 4 3 3 3
1 1 65 55 45 36 30 25 23 20 18 15 12 10 9 8 8
11/2 11/4 118 118 103 83 66 52 44 39 33 29 24 20 19 17 16
11/2 11/2 194 194 194 151 128 105 90 78 62 52 42 38 35 32 30
2 11/2 194 194 194 194 150 117 98 84 67 55 42 38 35 32 30
2 2 429 429 429 429 359 318 280 250 205 165 142 123 110 102 94
21/2 21/2 797 733 663 614 535 500 470 440 400 365 335 315 285 267 250
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Current Table A-2.6.3.1.(2)A, Pressure Range Over 413 kPa
Water
Service
Pipe
Size
Water
Distribution
PipeSize
MaximumAllowableLength,meters
12 18 24 30 46 61 76 91 122 152 183 213 244 274 305
NumberofFixtureUnitsServed
in. in. FlowVelocity,m/s: 3.0
2.4 1.5
PressureOver 413 kPa
3/4 1/2 8 8 7
6 5 4 3 3 2 1 1 1 1 1 0
3/4 5/8 13 13 13 13 11
8 7 6 5 4 3 3 3 2 2
3/4 3/4 21 21 21 21 17
13 11 10 8 7 6 6 5 4 4
1 1 42 42 42 42 38 32
29 26 22 18 14 13 12 12 11
11/2 11/4 83 83 83 83 83 74 62
54 43 34 26 25 23 22 21
11/2 11/2 151 151 151 151 151 151 130 113
88 73 51 51 46 43 40
2 11/2 151 151 151 151 151 151 142 122
98 82 64 51 46 43 40
2 2 359 359 359 359 359 359 359 340 288
245 204 172 153 141 129
21/2 21/2 611 611 611 611 611 611 610 570 510 460
430 404 380 356 329
Modified Table A-2.6.3.1.(2)A, Pressure Range Over 413 kPa
Water
Service
Pipe
Size
Water
Distribution
PipeSize
MaximumAllowableLength,meters
12 18 24 30 46 61 76 91 122 152 183 213 244 274 305
NumberofFixtureUnitsServed
in. in. FlowVelocity,m/s: 3.65 3.0 2.4 1.5
PressureOver 413 kPa
3/4 1/2 11 11 7 6 5 4 3 3 2 1 1 1 1 1 0
3/4 5/8 19 19 18 15 11 8 7 6 5 4 3 3 3 2 2
3/4 3/4 30 30 26 22 17 13 11 10 8 7 6 6 5 4 4
1 1 65 65 63 54 40 32 29 26 22 18 14 13 12 12 11
11/2 11/4 118 118 118 118 89 74 62 54 43 34 26 25 23 22 21
11/2 11/2 194 194 194 194 194 151 130 113 88 73 51 51 46 43 40
2 11/2 194 194 194 194 194 169 142 122 98 82 64 51 46 43 40
2 2 429 429 429 429 429 429 391 340 288 245 204 172 153 141 129
21/2 21/2 797 797 797 797 728 651 610 570 510 460 430 404 380 356 329
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