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TECHNICAL INFO
Reference
WATER VELOCITY TABLE
INTERNAL PIPE DIAMETER
gpm 2" 4" 6" 8" 10" 12" 14" 16" 18" 20" 22" 24" 26" 28" 30" 32" 34" 36" 38" 40" 42" 44" 46" 48"
10 1.0 0.3 0.1 0.1 — — — — — — — — — — — — — — — — — — — —
20 2.0 0.5 0.2 0.1 0.1 0.1 — — — — — — — — — — — — — — — — — —
30 3.1 0.8 0.3 0.2 0.1 0.1 0.1 — — — — — — — — — — — — — — — — —
40 4.1 1.0 0.5 0.3 0.2 0.1 0.1 0.1 0.1 — — — — — — — — — — — — — — —
50 5.1 1.3 0.6 0.3 0.2 0.1 0.1 0.1 0.1 0.1 — — — — — — — — — — — — — —
60 6.1 1.5 0.7 0.4 0.2 0.2 0.1 0.1 0.1 0.1 0.1 — — — — — — — — — — — — —
70 7.2 1.8 0.8 0.4 0.3 0.2 0.1 0.1 0.1 0.1 0.1 — — — — — — — — — — — — —
80 8.2 2.0 0.9 0.5 0.3 0.2 0.2 0.1 0.1 0.1 0.1 0.1 — — — — — — — — — — — —
90 9.2 2.3 1.0 0.6 0.4 0.3 0.2 0.1 0.1 0.1 0.1 0.1 0.1 — — — — — — — — — — —
100 10.2 2.6 1.1 0.6 0.4 0.3 0.2 0.2 0.1 0.1 0.1 0.1 0.1 0.1 — — — — — — — — — —
150 15.3 3.8 1.7 1.0 0.6 0.4 0.3 0.2 0.2 0.2 0.1 0.1 0.1 0.1 0.1 0.1 0.1 — — — — — — —
200 20.4 5.1 2.3 1.3 0.8 0.6 0.4 0.3 0.3 0.2 0.2 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 — — — —
250 25.5 6.4 2.8 1.6 1.0 0.7 0.5 0.4 0.3 0.3 0.2 0.2 0.2 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 — —
300 30.7 7.7 3.4 1.9 1.2 0.9 0.6 0.5 0.4 0.3 0.3 0.2 0.2 0.2 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1
350 35.8 8.9 4.0 2.2 1.4 1.0 0.7 0.6 0.4 0.4 0.3 0.2 0.2 0.2 0.2 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1
400 40.9 10.2 4.5 2.6 1.6 1.1 0.8 0.6 0.5 0.4 0.3 0.3 0.2 0.2 0.2 0.2 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1
450 46.0 11.5 5.1 2.9 1.8 1.3 0.9 0.7 0.6 0.5 0.4 0.3 0.3 0.2 0.2 0.2 0.2 0.1 0.1 0.1 0.1 0.1 0.1 0.1
500 51.1 12.8 5.7 3.2 2.0 1.4 1.0 0.8 0.6 0.5 0.4 0.4 0.3 0.3 0.2 0.2 0.2 0.2 0.1 0.1 0.1 0.1 0.1 0.1
600 61.3 15.3 6.8 3.8 2.5 1.7 1.3 1.0 0.8 0.6 0.5 0.4 0.4 0.3 0.3 0.2 0.2 0.2 0.2 0.2 0.1 0.1 0.1 0.1
700 71.5 17.9 7.9 4.5 2.9 2.0 1.5 1.1 0.9 0.7 0.6 0.5 0.4 0.4 0.3 0.3 0.2 0.2 0.2 0.2 0.2 0.1 0.1 0.1
800 81.7 20.4 9.1 5.1 3.3 2.3 1.7 1.3 1.0 0.8 0.7 0.6 0.5 0.4 0.4 0.3 0.3 0.3 0.2 0.2 0.2 0.2 0.2 0.1
900 92.0 23.0 10.2 5.7 3.7 2.6 1.9 1.4 1.1 0.9 0.8 0.6 0.5 0.5 0.4 0.4 0.3 0.3 0.3 0.2 0.2 0.2 0.2 0.2
1000 102.2 25.5 11.4 6.4 4.1 2.8 2.1 1.6 1.3 1.0 0.8 0.7 0.6 0.5 0.5 0.4 0.4 0.3 0.3 0.3 0.2 0.2 0.2 0.2
1250 127.7 31.9 14.2 8.0 5.1 3.5 2.6 2.0 1.6 1.3 1.1 0.9 0.8 0.7 0.6 0.5 0.4 0.4 0.4 0.3 0.3 0.3 0.2 0.2
1500 153.3 38.3 17.0 9.6 6.1 4.3 3.1 2.4 1.9 1.5 1.3 1.1 0.9 0.8 0.7 0.6 0.5 0.5 0.4 0.4 0.3 0.3 0.3 0.3
1750 178.8 44.7 19.9 11.2 7.2 5.0 3.6 2.8 2.2 1.8 1.5 1.2 1.1 0.9 0.8 0.7 0.6 0.6 0.5 0.4 0.4 0.4 0.3 0.3
2000 204.4 51.1 22.7 12.8 8.2 5.7 4.2 3.2 2.5 2.0 1.7 1.4 1.2 1.0 0.9 0.8 0.7 0.6 0.6 0.5 0.5 0.4 0.4 0.4
2500 255.4 63.9 28.4 16.0 10.2 7.1 5.2 4.0 3.2 2.6 2.1 1.8 1.5 1.3 1.1 1.0 0.9 0.8 0.7 0.6 0.6 0.5 0.5 0.4
3000 306.5 76.6 34.1 19.2 12.3 8.5 6.3 4.8 3.8 3.1 2.5 2.1 1.8 1.6 1.4 1.2 1.1 0.9 0.8 0.8 0.7 0.6 0.6 0.5
3500 357.6 89.4 39.7 22.4 14.3 9.9 7.3 5.6 4.4 3.6 3.0 2.5 2.1 1.8 1.6 1.4 1.2 1.1 1.0 0.9 0.8 0.7 0.7 0.6
4000 408.7 102.2 45.4 25.5 16.3 11.4 8.3 6.4 5.0 4.1 3.4 2.8 2.4 2.1 1.8 1.6 1.4 1.3 1.1 1.0 0.9 0.8
0.8 0.7
4500 459.8 114.9 51.1 28.7 18.4 12.8 9.4 7.2 5.7 4.6 3.8 3.2 2.7 2.3 2.0 1.8 1.6 1.4 1.3 1.1 1.0 0.9 0.9 0.8
5000 510.9 127.7 56.8 31.9 20.4 14.2 10.4 8.0 6.3 5.1 4.2 3.5 3.0 2.6 2.3 2.0 1.8 1.6 1.4 1.3 1.2 1.1 1.0 0.9
5500 562.0 140.5 62.4 35.1 22.5 15.6 11.5 8.8 6.9 5.6 4.6 3.9 3.3 2.9 2.5 2.2 1.9 1.7 1.6 1.4 1.3 1.2 1.1 1.0
6000 613.1 153.3 68.1 38.3 24.5 17.0 12.5 9.6 7.6 6.1 5.1 4.3 3.6 3.1 2.7 2.4 2.1 1.9 1.7 1.5 1.4 1.3 1.2 1.1
Main line pipe diameter under standard practice is sized to achieve < 5 feet-per-second water velocity.
Wet-well intake pipe diameter under standard practice is sized to achieve < 1.5 feet-per-second water velocity.
Velocities listed are based on the actual internal diameter fo the pipe. Verify internal diameter based on class or type of pipe being used.