Pipe Friction Calculation

PVC ( SCHEDULE 40 ) --- 1/2 INCH ( Max 10 gpm )
Volume Flow
(gal/min)
Friction Head
(ftH2O/100 ft)
Friction Loss
(psi/100 ft)
1 2.1 0.9
2 4.2 1.8
5 23.4 10.5
7 43.1 18.6
10 82.0 35.5

PVC ( SCHEDULE 40 ) --- 3/4 INCH  ( Max 20 gpm )
Volume Flow
(gal/min)
Friction Head
(ft/100 ft)
Friction Loss
(psi/100 ft)
1 0.5 0.2
2 1.0 0.4
5 5.7 2.5
7 10.5 4.6
10 20.0 8.7
15 42.5 18.4
20 72.3 31.3

PVC ( SCHEDULE 40 ) --- 1 INCH  ( Max 30 gpm )
Volume Flow
(gal/min)
Friction Head
(ft/100 ft)
Friction Loss
(psi/100 ft)
2 0.6 0.2
5 1.7 0.8
7 3.2 1.4
10 6.0 2.6
15 12.8 5.5
20 21.8 9.4
25 32.9 14.2
30 46.1 20.0

PVC ( SCHEDULE 40 ) --- 1-1/4 INCH  ( Max 50 gpm )
Volume Flow
(gal/min)
Friction Head
(ft/100 ft)
Friction Loss
(psi/100 ft)
2 0.1 0.1
5 0.4 0.2
7 0.8 0.4
10 1.6 0.7
15 3.3 1.4
20 5.6 2.4
25 8.5 3.7
30 11.9 5.1
35 15.8 6.8
40 20.2 8.7
45 25.1 10.9
50 30.5 13.2

PVC ( SCHEDULE 40 ) --- 1-1/2 INCH  ( Max 60 gpm )
Volume Flow
(gal/min)
Friction Head
(ft/100 ft)
Friction Loss
(psi/100 ft)
2 0.1 0.03
5 0.2 0.1
7 0.4 0.2
10 0.7 0.3
15 1.5 0.7
20 2.6 1.1
25 4.0 1.7
30 5.5 2.4
35 7.4 3.2
40 9.4 4.1
45 11.7 5.1
50 14.3 6.2
60 20.0 8.7
PVC ( SCHEDULE 40 ) --- 2 INCH  ( Max 100 gpm )
Volume Flow
(gal/min)
Friction Head
(ft/100 ft)
Friction Loss
(psi/100 ft)
5 0.07 0.03
7 0.1 0.05
10 0.2 0.09
15 0.5 0.2
20 0.8 0.3
25 1.2 0.5
30 1.6 0.7
35 2.2 0.9
40 2.8 1.2
45 3.4 1.5
50 4.2 1.8
60 5.8 2.5
70 7.8 3.4
75 8.8 3.8
80 9.9 4.3
90 12.4 5.4
100 15.0 6.5