On 10 Jun 2004 23:52:22 GMT, (DavesVideo) wrote:

Say a pump is advertised as able to deliver 1000 gal/hour at say a height of
6". I would guess that it means 6" above the surface of the water rather than
the bottom where the pump sits. Is this true? Doesn't seem to make sense any
other way.


Dave
http://members.tripod.com/~VideoDave


Hi Dave,

Chaces are they are calculating for "head pressure". That means at 6" you can
get 1000 gal/hr... if you lifted it to 3 feet, for, say, a waterfall, you'd
probably drop to 600 gal/hr (guessing on the number).

If the pump is sitting at the bottom of your pond there is NO 'head pressure'
until the pumped water rises above the surface of your pond.

James, Seattle

www.jameskelseystudios.com