Hello, I am learning physics on my own and came across this question about why we would have low water pressure in a high rise apartment compared to an apartment located on ground level. I googled and cannot find a direct explanation. I took some time to think about the approach and I could only come up with this explanation. First of all, I assume that the energy used to deliver a fixed amount of water is the same for a low-rise and a high-rise apartment (since water pumps should be working at constant power). Does this assumption make sense? Secondly, Energy = Force x distance and pressure is proportional to force. Area of taps outlets are the same. For the same amount of energy, the lowrise apt should receive water at a higher force/pressure as compared to a high rise. Does that make sense? Anyone has a better explanation?