V= square root of 2hg where:

V= discharge velocity of nozzle or muzzle (ft/sec)

g= acceleration due to gravity (32 ft/sec/sec)

h= velocity head (ft)

An P = 0.433 h where:

P- pressure head (psi)

h=head(ft)

Take 75 psi

P= 75 psi = 0.433h

h=173.2 ft

V= square root of 2(32)(173.2)=105.3 ft/sec