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TABLE 2 - FRICTION LOSS FOR PLASTIC PIPE*
Loss of head in feet, due to friction per 100 feet of pipe.
Nominal
Pipe Size
U.S. GPM
3/4"
4
3.75
5
5.66
6
7.95
7
10.60
8
13.50
9
16.80
10
20.40
11
24.40
12
28.60
14
38.00
16
48.60
18
60.50
20
73.50
*For galvanized pipe, double the figures.
Priming Plug
Drain Plug
Clean-Out Plug
Suction
Well Seal
Well Casing
Foot Valve
FIG. 2A SHALLOW WELL (WITH FOOT VALVE)
Relief Valve
Priming Plug
Drain Plug
Well Casing
FIG. 2C SHALLOW WELL - INLINE TANK (WITH FOOT VALVE)
1"
1-1/4''
1-1/2''
1.15
0.30
0.14
1.75
0.46
0.22
2.45
0.65
0.31
3.25
0.86
0.41
4.16
1.10
0.52
5.17
1.35
0.65
6.31
1.67
0.79
7.58
1.98
0.95
8.85
2.33
1.10
11.80
3.10
1.46
15.10
3.96
1.87
18.70
4.93
2.33
22.80
6.00
2.83
TYPICAL INSTALLATIONS
Tank
Relief Valve
Pressure Gauge
(optional)
Drain
Vent
Plug
Vent
Tank
Pressure Gauge
(optional)
Vent
Plug
Clean-Out Plug
Suction
Vent
Well Seal
Foot Valve
Loss of head in meters, due to friction per 100 meters of pipe.
Nominal
Pipe Size
2''
L/Min.
–
15
–
20
–
25
–
30
–
35
–
40
0.23
45
0.27
50
0.32
55
0.43
60
0.55
65
0.69
70
0.84
75
Drain Plug
FIG. 2B SHALLOW WELL (WITH INLINE CHECK VALVE)
Union Couping (2 are required)
Drain Plug
FIG. 2D SHALLOW WELL - TANK MOUNTED SYSTEM
3
20mm
25mm
32mm
3.7
1.15
0.30
5.3
1.64
0.43
7.1
2.18
0.56
13.5
4.13
1.08
16.3
5.00
1.31
23.5
7.30
1.90
28.3
8.74
2.31
34.2
10.60
2.79
40.7
12.60
3.32
48.1
14.90
3.92
55.7
17.30
4.45
63.8
19.70
5.20
72.2
22.40
5.89
Tank
Priming Plug
Relief Valve
Pressure Gauge
(optional)
Drain
Vent
Plug
Inline Check Valve
Clean-Out Plug
Suction
Vent
Well Seal
Well Casing
Shut Off Valve
Priming Plug
Pressure
Gauge
(optional)
Vent
Plug
Clean-Out
Plug
Relief Valve
Drain
(WITH FOOT VALVE)
40mm
50mm
0.13
–
0.19
–
0.27
–
0.49
–
0.61
–
0.88
0.25
1.07
0.29
1.32
0.38
1.56
0.46
1.85
0.54
2.15
0.63
2.46
0.73
2.78
0.83
Suction
Vent
Well Seal
Well Casing
Foot Valve
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