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Is pressure less, by some infinitesimally small amount, at the end of a pipe run, say at a tap, than at the beginning, say at the internal stopcock? Because the pressure available to push water out of the stop-cock is less than the pressure available to push the water out of the tap, because it was finite to begin with so the further away you get from the source of pressure and the greater the amount of water said pressure is trying to shift the less the effect of the pressure and so the less of the residual pressure that is left....?
And if it is - if you ran a pipe, from the stopcock, in a straight line, level for a, for argument's sake, potentially inexhaustible distance in miles - if there was sufficient water to fill this pipe all the way up until the point of exit but the pressure as the stopcock was just normal mains pressure, would you reach a point where nothing would come out the other end? Because the pressure wasn't great enough to move the water through the pipe? And is there a calculation to work out what this would be? It's much easier to think about water being pumped upwards when gravity is fighting you and the limitations there.. Just wondering if it's was in a straight line..
If this effect does exist and doesn't actually require very long distances before it can cause problems I guess it would be part of the calculations used for commercial plumbing. I only thought because there's another thread about running a pipe for an outside tap for 25metres. Made me think how long you'd have to run a pipe on mains before it was too long to work.
And if it is - if you ran a pipe, from the stopcock, in a straight line, level for a, for argument's sake, potentially inexhaustible distance in miles - if there was sufficient water to fill this pipe all the way up until the point of exit but the pressure as the stopcock was just normal mains pressure, would you reach a point where nothing would come out the other end? Because the pressure wasn't great enough to move the water through the pipe? And is there a calculation to work out what this would be? It's much easier to think about water being pumped upwards when gravity is fighting you and the limitations there.. Just wondering if it's was in a straight line..
If this effect does exist and doesn't actually require very long distances before it can cause problems I guess it would be part of the calculations used for commercial plumbing. I only thought because there's another thread about running a pipe for an outside tap for 25metres. Made me think how long you'd have to run a pipe on mains before it was too long to work.
