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In observance of the Christmas holiday, Irrigation Direct will be closed on Wednesday, Thursday and Friday, December 24th, 25th, 26th. Website orders placed after 3pm Tuesday, December 23rd, will be shipped on Monday, December 29th. (Pacific Standard Time). Pallet and Drop Ship orders may ship next day (Excluding Saturday & Sunday) Have a safe and Happy Holiday!

Table Velocity Flows same for all








Schedule 40 thermoplastic pipe



















VELOCITY FLOWS


























SCHEDULE 40 PVC PIPE















  Nominal Pipe Size  
Velocity 1/2 in 3/4 in 1 in 1-1/4 in 1-1/2 in 2 in 2-1/2 in 3 in 4 in 6 in 8 in 10 in 12 in Velocity
ft/s Flow: gpm* ft/s
1 0.9 1.6 2.6 4.5 6.2 10.3 14.6 22.7 39.1 89.0 154.4 243.6 346.0 1
2 1.8 3.2 5.2 9.1 12.4 20.5 29.3 45.3 78.3 178.1 308.8 487.2 692.0 2
3 2.7 4.7 7.8 13.6 18.6 30.8 43.9 68.0 117.4 267.1 463.2 730.9 1038.1 3
4 3.5 6.3 10.4 18.1 24.8 41.0 58.5 90.6 156.5 356.2 617.6 974.5 1384.1 4
5 4.4 7.9 13.0 22.6 30.9 51.3 73.2 113.3 195.6 445.2 772.0 1218.1 1730.1 5
6 5.3 9.5 15.6 27.2 37.1 61.5 87.8 135.9 234.8 534.2 926.4 1461.7 2076.1 6
7 6.2 11.1 18.1 31.7 43.3 71.8 102.4 158.6 273.9 623.3 1080.9 1705.4 2422.1 7
8 7.1 12.7 20.7 36.2 49.5 82.1 117.1 181.2 313.0 712.3 1235.3 1949.0 2768.1 8
9 8.0 14.2 23.3 40.8 55.7 92.3 131.7 203.9 352.2 801.4 1389.7 2192.6 3114.2 9
10 8.9 15.8 25.9 45.3 61.9 102.6 146.3 226.5 391.3 890.4 1544.1 2436.2 3460.2 10
11 9.8 17.4 28.5 49.8 68.1 112.8 161.0 249.2 430.4 979.4 1698.5 2679.9 3806.2 11
12 10.6 19.0 31.1 54.3 74.3 123.1 175.6 271.8 469.5 1068.5 1852.9 2923.5 4152.2 12
13 11.5 20.6 33.7 58.9 80.5 133.3 190.2 294.5 508.7 1157.5 2007.3 3167.1 4498.2 13
14 12.4 22.2 36.3 63.4 86.6 143.6 204.9 317.1 547.8 1246.6 2161.7 3410.7 4844.3 14
15 13.3 23.7 38.9 67.9 92.8 153.9 219.5 339.8 586.9 1335.6 2316.1 3654.4 5190.3 15
* Flows calculated with factors in Table 320 may vary slightly due to rounding off of factors.


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