Pump head is the height the water is pumped to and the friction loss in
getting it there. The higher the head, the lower the flow rate. At maximum
head, the flow rate should be zero, and at maximum flow, the head should be
near zero. In between, the flow is reduced as shown on the chart. The foam
head has some restriction that acts as friction head. As far as the height
of the spray, it is a matter of the pressure behind the spray head. Think
of the height of flow from an open garden hose, and the height of flow if
the garden hose is put on full stream type spray, but then if the flow is
restricted enough, as in mist spray, then the height is again lowered
significantly. I don't know how these factors would affect your foam head.
--
RichToyBox
http://www.geocities.com/richtoybox/pondintro.html
"LittleScooby" wrote in
message .. .

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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