View Single Post
  #9   Report Post  
Old 22-06-2004, 12:08 AM
Barbara2245
 
Posts: n/a
Default Selecting an efficent pond pump

"Pat" wrote in message news:[email protected]_s53...
"grubber" wrote in message
...
"Pat" wrote in message
news:[email protected]_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.


The Laguna Power Jet 5000 I bought a few years ago cost about $5/month
to run. I replaced the pre-filter with an plastic net onion bag. Any
pump will clog fast if you don't clam-shell it in two small baskets
lined with a blue Walmart trimable furnace filter amd enclosed in a
bag made from fiberglass window screen. Set this on a cement block in
the pond and use a hoe[I have a hoe handle with the hook end still on
it] or something to fish it out when cleaning is needed. This pump
runs my 4" waterfall and a fountain. To figure the cost to run a
pump---watts[amps x volts] divided by 1000x KWH cost x 24 hours x 30
days= cost. Good luck.

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