Which of the 2 fire hydrants has a higher pressure if they are on different levels.?

Question

The fire hydrant that is at the first floor or the one at the fourth floor has a higher pressure?

Answer 1

the fire hydrant at the first floor will have more pressure SINCE

pressure= height *density*g [height is below ground level ,but we can take sea level = as fourth floor height ,so by the formula pressure at 4th floor =0 and pressure at 1st floor will be a variable according to height

Answer 2

if untaped they both have the same pressure. once taped the first floor will retain a greater pressure.

Answer 3

If they are on the same system then the first floor one has the higher pressure