HEAD LOSS CHART

PIPE DIAMETER

(inches)

Head loss in feet per 100 feet of pipe in PVC Class 130 plastic type pipe
  FLOW (gpm)
 
0.5
1
2
3
4
5
10
15
20
30
40
50
60
70
80
90
100
150
200
250
300
400
1/2 1.1 3.8 13.7 49.3 74.5                                  
3/4 0.1 0.5 1.9 4.0 6.8 10.3 37.3 79.0                            
1   0.1 0.5 1.0 1.7 2.5 9.2 19.5 33.1 70.1                        
1.1/4     0.2 0.3 0.6 0.9 3.1 6.6 11.2 23.7 40.3 60.9 85.3                  
1.1/2     0.1 0.1 0.2 0.4 1.3 2.7 4.6 9.7 16.6 25.1 35.1 46.7 59.8 74.3 90.3          
2         0.1 0.1 0.3 0.7 1.1 2.4 4.1 6.2 8.6 11.5 14.7 18.3 22.2 47.1 80.2      
2.1/2             0.1 0.2 0.4 0.8 1.4 2.1 2.9 3.9 5.0 6.2 7.5 15.9 27.1 40.9 57.3 97.5
3               0.1 0.2 0.3 0.6 0.9 1.2 1.6 2.0 2.5 3.1 6.5 11.1 16.8 23.6 40.1
4                   0.1 0.1 0.2 0.3 0.4 0.5 0.6 0.8 1.6 2.7 4.1 5.8 9.9
5                       0.1 0.1 0.1 0.2 0.2 0.3 0.5 0.9 1.4 2.0 3.3
6                           0.1 0.1 0.1 0.1 0.2 0.4 0.6 0.8 1.4

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