Pipe Loss Chart 2″ to 3″

Loss of head in feet per 100 feet of pipe length

This chart shows friction losses in various pipe materials at the standard water temperature of 68.4 F or 20.2 C. This chart is just a guide. There are too many types of pipe to list individually. The PVC column shows a slightly better pipe choice than average. The polyethylene is a slightly worse choice. The cast iron reference is almost a worst case scenario but sometimes a necessary pipe choice for very high head pipelines. You should also check the flow velocity chart and temperature chart for reference and keep the number of sharp turns to a minimum.

GPM 2″
PVC Class 160		 2″
PE SDR		 2″
Cast Steel		 2.5″
PVC Class 160		 2.5″
PE SDR		 2.5″
Cast Steel		 3″
PVC Class 160		 3″
PE SDR		 3″
Cast Steel
2 0.01 0.01 0.02 0.01 0.01 0.02
3 0.01 0.02 0.03 0.01 0.01 0.02
4 0.02 0.05 0.06 0.01 0.02 0.03
5 0.04 0.07 0.11 0.02 0.03 0.04
6 0.07 0.09 0.2 0.03 0.05 0.06
8 0.1 0.16 0.28 0.04 0.07 0.09
10 .016 0.23 0.4 0.07 0.09 0.12 0.02 0.02 0.05
12 0.2 0.32 0.5 0.08 0.14 0.16 0.02 0.05 0.07
14 0.28 0.44 0.6 0.12 0.18 0.23 0.03 0.07 0.1
16 0.37 0.55 0.8 0.14 0.23 0.27 0.04 0.08 0.12
18 0.46 0.69 1.0 0.18 0.3 0.35 0.07 0.09 0.16
20 0.55 0.83 1.2 0.21 0.35 0.41 0.09 0.12 0.2
25 0.85 1.3 1.75 0.32 0.53 0.62 0.13 0.18 0.28
30 1.2 1.8 2.4 0.43 0.74 0.83 0.18 0.25 0.4
35 1.55 2.35 3.1 0.62 1.0 1.0 0.23 0.35 0.52
40 2.0 3.0 4.0 0.78 1.27 1.4 0.3 0.44 0.7
45 2.5 3.75 4.9 0.97 1.59 1.7 0.37 0.55 0.84
50 3.0 4.55 6.1 1.2 1.91 2.1 0.46 0.67 1.0
55 3.6 5.4 7.3 1.43 2.26 2.4 0.55 0.81 1.2
60 4.2 6.4 8.6 1.66 2.7 2.9 0.64 0.94 1.4
65 4.9 7.4 9.9 1.9 3.13 3.3
70 5.6 8.5 11.5 2.21 3.59 3.9 0.85 1.24 1.8
75 6.4 9.7 13.0 2.5 4.07 4.4
80 7.2 10.9 14.8 2.83 4.58 5.0 1.08 1.59 2.3
85 8.0 12.2 16.5 3.15 5.13 5.6
90 8.9 13.5 18.4 3.52 5.71 6.3 1.36 1.98 2.8
95 9.9 15.0 20.3 3.88 6.3 7.0
100 10.9 16.5 22.2 4.28 6.92 7.7 1.66 2.42 2.4
125 14.2 23.7 6.7 10.1 10.1 2.42 3.43 5.2
150 23.2 9.1 14.7 16.1 3.5 5.11 7.5
175 11.7 18.9 22.2 4.53 6.58 10.5
200 15.5 25.0 27.5