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

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

Or find water solenoid valves here..