Hydrostatic Water Pressure

Water pressure increases in direct relation to its height, for example the higher the water is from the point of measured the higher the measured pressure.

Water in a tank 10 meters high will exert a pressure of 1 Bar. The table below shows the height of water column in meters and feet and the pressure created measured in Pka, Bar, atmospheres (atm) and psi (pounds per square inch).

Height of Water Column
Pressure
(m)
(ft)
(kPa)
(Bar)
(atm)
(psi)
1
3.28
9.81
0.098
0.097
1.42
2
6.56
19.6
0.196
0.194
2.85
3
9.84
29.4
0.294
0.290
4.27
4
13.1
39.2
0.392
0.387
5.69
5
16.4
49.1
0.491
0.484
7.11
6
19.7
58.9
0.589
0.581
8.54
7
23.0
68.7
0.687
0.678
10.0
8
26.2
78.5
0.785
0.775
11.4
9
29.5
88.3
0.883
0.871
12.8
10
32.8
98.1
0.981
0.968
14.2
12
39.4
118
1.18
1.16
17.1
14
45.9
137
1.37
1.36
19.9
16
52.5
157
1.57
1.55
22.8
18
59.0
177
1.77
1.74
25.6
20
65.6
196
1.96
1.94
28.5
25
82.0
245
2.45
2.42
35.6
30
98.4
294
2.94
2.90
42.7
35
115
343
3.43
3.39
49.8
40
131
392
3.92
3.87
56.9
50
164
491
4.91
4.84
71.1
60
197
589
5.89
5.81
85.4
70
230
687
6.87
6.78
100
80
262
785
7.85
7.75
114
90
295
883
8.83
8.71
128
100
328
981
9.81
9.68
142

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You can find solenoid valves according to the working pressure here..

Or find water solenoid valves here..