How does water pressure remain even without electricity?
In: Engineering
While all others answers are also correct. Nowadays the water pressure is build up by using large pumps which run on electricity. When the power shutsdown, all water plants generally have a emergency generator to generate electricity and still be able to operate the pumps.
When that last resort is also not available, the pressure remains as is, because it’s basically a closed network (blocked on both sides). However, once you open a water point, the pressure will gradually drop to the point at which finally no water will come out, at least not at high points. You can therefore only tap water at the lowest point in the network in a situation that the pipeline is still filled and there is no electricity.
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