# 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.
• Bernoulli's law will get you quite close to the actual value. Jan 15, 2012 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. Jan 16, 2012 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 Jan 18, 2012 at 8:53