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 | 4″ PVC Class 160 |
4″ PE SDR |
4″ Cast Steel |
5″ PVC Class 160 |
6″ PVC Class 160 |
6″ Cast Steel |
8″ PVC |
8″ Cast |
10″ PVC |
10″ Cast |
12″ Steel |
16″ Steel |
20″ Steel |
24″ Steel |
30″ Steel |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
10 | 0.01 | 0.01 | 0.01 | 0.01 | 0.01 | 0.01 | |||||||||
12 | 0.01 | 0.01 | 0.02 | 0.01 | 0.01 | 0.01 | |||||||||
14 | 0.01 | 0.02 | 0.02 | 0.01 | 0.01 | 0.01 | |||||||||
16 | 0.02 | 0.02 | 0.03 | 0.01 | 0.01 | 0.01 | |||||||||
18 | 0.02 | 0.02 | 0.03 | 0.01 | 0.01 | 0.02 | |||||||||
20 | 0.02 | 0.03 | 0.04 | 0.01 | 0.01 | 0.02 | |||||||||
25 | 0.03 | 0.04 | 0.05 | 0.01 | 0.01 | 0.02 | |||||||||
30 | 0.05 | 0.07 | 0.09 | 0.02 | 0.01 | 0.02 | |||||||||
35 | 0.07 | 0.09 | 0.12 | 0.02 | 0.01 | 0.02 | |||||||||
40 | 0.09 | 0.12 | 0.15 | 0.02 | 0.01 | 0.02 | |||||||||
45 | 0.12 | 0.15 | 0.19 | 0.03 | 0.01 | 0.02 | |||||||||
50 | 0.14 | 0.2 | 0.23 | 0.04 | 0.02 | 0.02 | |||||||||
55 | 0.16 | 0.23 | 0.28 | 0.05 | 0.02 | 0.02 | |||||||||
60 | 0.18 | 0.26 | 0.32 | 0.07 | 0.02 | 0.03 | |||||||||
70 | 0.25 | 0.36 | 0.41 | 0.09 | 0.03 | 0.04 | |||||||||
80 | 0.32 | 0.46 | 0.57 | 0.12 | 0.04 | 0.06 | |||||||||
90 | 0.39 | 0.57 | 0.7 | 0.14 | 0.06 | 0.09 | |||||||||
100 | 0.48 | 0.7 | 0.87 | 0.18 | 0.08 | 0.12 | 0.02 | 0.04 | 0.01 | 0.01 | 0.01 | ||||
125 | 0.71 | 1.03 | 1.31 | 0.26 | 0.12 | 0.18 | |||||||||
150 | 1.04 | 1.5 | 1.83 | 0.37 | 0.16 | 0.25 | 0.04 | 0.07 | 0.02 | 0.02 | 0.01 | ||||
175 | 1.33 | 1.93 | 2.43 | 0.48 | 0.21 | 0.33 | |||||||||
200 | 1.75 | 2.54 | 3.1 | 0.62 | 0.28 | 0.42 | 0.07 | 0.11 | 0.02 | 0.03 | 0.02 | ||||
225 | 2.12 | 3.1 | 3.8 | 0.79 | 0.34 | 0.52 | |||||||||
250 | 2.65 | 3.84 | 4.65 | 0.94 | 0.42 | 0.63 | 0.11 | 0.16 | 0.03 | 0.05 | 0.03 | ||||
300 | 3.73 | 5.4 | 6.5 | 1.34 | 0.58 | 0.89 | 300 | 0.15 | 0.22 | 0.05 | 0.07 | 0.03 | |||
350 | 4.95 | 7.2 | 8.91 | 1.78 | 0.76 | 1.19 | 0.20 | 0.29 | 0.07 | 0.09 | 0.04 | ||||
400 | 6.33 | 9.2 | 11.4 | 2.25 | 0.97 | 1.51 | 0.26 | 0.37 | 0.1 | 0.12 | 0.05 | ||||
450 | 7.87 | 11.4 | 15.6 | 2.81 | 1.2 | 1.87 | 0.32 | 0.46 | 0.12 | 0.15 | 0.06 | ||||
500 | 9.55 | 13.9 | 19.0 | 3.41 | 1.45 | 2.27 | 0.40 | 0.56 | 0.14 | 0.19 | 0.08 | 0.018 | |||
550 | 11.4 | 16.5 | 22.8 | 4.07 | 1.75 | 2.64 | 0.48 | 0.67 | 0.16 | 0.22 | 0.09 | ||||
600 | 13.4 | 19.4 | 4.78 | 2.05 | 3.18 | 0.57 | 0.79 | 0.18 | 0.26 | 0.11 | 0.026 | ||||
650 | 15.5 | 22.5 | 2.37 | 3.61 | 0.67 | 0.91 | 0.21 | 0.29 | 0.13 | ||||||
700 | 17.8 | 2.71 | 4.22 | 0.76 | 1.05 | 0.25 | 0.35 | 0.15 | 0.034 | ||||||
750 | 20.3 | 3.1 | 4.8 | 0.86 | 1.19 | 0.3 | 0.39 | 0.17 | |||||||
800 | 3.5 | 5.4 | 0.97 | 1.34 | 0.34 | 0.44 | 0.18 | 0.043 | |||||||
850 | 1.08 | 1.49 | 0.38 | 0.49 | 0.2 | ||||||||||
900 | 4.32 | 6.9 | 1.2 | 1.66 | 0.42 | 0.55 | 0.23 | 0.054 | |||||||
950 | 1.32 | 1.82 | 0.46 | 0.6 | 0.25 | ||||||||||
1000 | 5.27 | 8.4 | 1.45 | 2.02 | 0.51 | 0.67 | 0.28 | 0.066 | 0.023 | 0.008 | |||||
1100 | 0.8 | 0.33 | 0.078 | ||||||||||||
1200 | 0.94 | 0.39 | 0.092 | 0.032 | 0.012 | ||||||||||
1300 | 1.09 | 0.45 | 0.106 | ||||||||||||
1400 | 1.26 | 0.51 | 0.122 | 0.042 | 0.016 | ||||||||||
1500 | 0.58 | 0.138 | |||||||||||||
1600 | 0.65 | 0.155 | 0.052 | 0.020 | |||||||||||
1800 | 0.81 | 0.193 | 0.064 | 0.025 | |||||||||||
2000 | 0.99 | 0.23 | 0.077 | 0.031 | 0.01 | ||||||||||
2200 | 1.17 | 0.28 | 0.092 | 0.037 | 0.012 | ||||||||||
2400 | 0.33 | 0.108 | 0.043 | 0.014 | |||||||||||
2600 | 0.38 | 0.125 | 0.05 | 0.017 | |||||||||||
2800 | 0.44 | 0.143 | 0.058 | 0.019 | |||||||||||
3000 | 0.5 | 0.162 | 0.066 | 0.022 | |||||||||||
3500 | 0.66 | 0.21 | 0.088 | 0.028 | |||||||||||
4000 | 0.276 | 0.112 | 0.036 | ||||||||||||
4500 | 0.343 | 0.139 | 0.046 | ||||||||||||
5000 | 0.416 | 0.168 | 0.056 | ||||||||||||
5500 | 0.496 | 0.2 | 0.067 | ||||||||||||
6000 | 0.580 | 0.235 | 0.078 | ||||||||||||
6500 | 0.09 | ||||||||||||||
7000 | 0.103 | ||||||||||||||
7500 | 0.117 | ||||||||||||||
8000 | 0.132 | ||||||||||||||
9000 | 0.164 | ||||||||||||||
10000 | 0.2 |