"grubber" wrote in message
...
"Pat" wrote in message
news:spEBc.90019$Sw.26836@attbi_s51...
Hi all,

I would like to select an efficient (submersible) pond pump for my pond
(capable of 1200 gph at 4ft head). Unfortunately, most pump specs only
list
a single "power consumption" value without specifying what flow (or
head)
that occurs at. What I really need is a power consumption vs. flow (or
head) curve so I can determine the power consumption at my particular
conditions. Is there any way to extrapolate this from typically pump
specs?
Any other sources for this information? I'm currently considering Oase
and
Cyprio models.

Thanks for any help. I appreciate it. -Pat





I know Sequence pumps have power v flow curves available, but those are
external pumps. For submersibles, the Laguna 5000 should give the flow
you
need at around 85 watts, which is the most efficient submersible I found
when I looked.

If you can make an external pump work, they tend to be more efficient than
the submersibles.




Thanks for the reply.

I considered a Sequence but all their models are designed for larger
applications. The smallest I found (3200SEQ20) was rated for 2800gph. The
Laguna 5000 looks good, but would probably need a prefilter. Our last pump
required a prefilter, which constantly clogged and was a real pain. Also,
given how much lower it's advertised power consumption is than other
comparable mag drive products, I wonder how real it really is (either that,
or else the flowrate is not what they claim).

The appeal of either the Oase AquaMax/Powermax or Cyprio Titan is their
ability to pass solids, which (I think) should make them more maintenace
free. And they both look (on paper at least) to be pretty effiicient.

I'm surprised the manufacturers don't include more information on the power
use of their products since (in my opinion) this an important aspect to
consider when making a selection, given how much it can cost to operate
these things 24/7.

Thanks again, -Pat