Most of the better pump companies have flow charts for their pumps on their
web pages. Some have themn in the box that the pump comes in. Some don't
want you to know. Aquatic Eco has charts in their catalog for a lot of
pumps that don't furnish charts. If you look at the flow charts, there will
be a line for your pump, and where it crosses the head height, on the other
axis will be the flow. It varies greatly by pump design, speed, power,
manufacturer, etc.
--
RichToyBox
http://www.geocities.com/richtoybox/pondintro.html
"The~Doofie~Man©" wrote in message
...
Exactly what is the proper way to calculate water lift?

Let's say I have a 10' total rise and my pump is a 300gph.

How do I figure out the new gph?
There must be a simple/ standard formula.

BTW, the information and friendliness in this ng is rather unique. The
posts
& info has helped me immensely, even though I had to drain & "fix" my
mistakes twice. The pond looks wicked awesome now, thanks to info from
people in here.
--
The~Doofie~Man ©
"LET ME SEE YOUR CIGARETTE LIGHTERS!!!!!"
Putting the fun back in FUNeral!!
http://www.geocities.com/doof70/index.html