As
seen already, the water distribution by a rotating header,
is a significant part of the "Advance"
tower design. The large diameter holes in the rotating
header give a gentle stream of water at negligible pressure
loss. Also, there is no risk of 'clogging',
as can easily happen with spray nozzles in other types
of towers.
It should be noted that pumping heads quoted for "Advance"
towers include both of these as well as the piping inside
the pressure loss of the sprays. To this must be added
the static lift to the spray header from the basic water
level, plus the external piping friction loss. In many
cases the pumping head required for an "Advance"
tower is about 50% less than for some other towers.