# To calculate pressure at point in a vertical water pipe of given diameter

Is it possible to calculate pressure at a point in a pipe, where a solenoid valve shall be placed, given that

• the pipe carries water (utility supplied, regular water)
• from an overhead tank (at a certain height from ground)
• height of tank (i.e. max water column height, although not sure if vertical pipe-length should be added to it ?)
• water is flowing purely under the effect of gravity (and atmospheric pressure)
• value is installed at a certain height from ground
• pipe material is PVC
• pipe diameter is say 1.5inches.
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Bernoulli's law will get you quite close to the actual value. – Bernhard Jan 15 '12 at 18:43
Thanks @Bernhard. Care to elaborate a little ? Would be an understatement to say that my high-school physics is a bit rusty. – icarus74 Jan 16 '12 at 18:45
The result of this is already given in the answer by Martin (without mentioning Bernoulli's law. Basically, neglecting v-terms, giving dp=g dz – Bernhard Jan 18 '12 at 8:53
Thanks @Bernhard... better late than... – icarus74 Dec 8 '14 at 6:43