Pump Calculations

Can someone point me to a link that describes pump performance a little
better?

There is a chart, at the bottom of this page:

http://tinyurl.com/4kxjl

But, what I don't understand is, how do you determine the flow rate in
GPH if when using the pump listed, the maxium HT. of a water feature
can be only 2 or 3 feet?

The chart says the pump can make the maximum head be 11 feet for
example, with the P1600 pump at which point the flow rate would be only
220 GPH, but what if you are using a foam jet fountain, of which the
maximum height can only be 3 feet or so?

Does this mean, that using a nozzle that is limited to 3 feet in height
is automatically consuming the pumps flow rate so that it would be the
same as if an 11 foot high nozzle was being used?

I'm a little confused.


--
LittleScooby
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