Backyard Aquaponics
A place to discuss aquaponics

http://www.thereefshop.com.au/index.php ... cts_id=446

These are very good I have found, I have had one running on my aquarium 24/7 for about 3 years. I just replaced the impellor assembly on mine because laterite sludge had been going through it for years and it started getting a bit noisy. $60 for new impellor and its just like new again. Very quiet(I have it running in my bedroom!), well built and low power usage.

I just purchased the 3500 model as well to put on one of my other aquariums because I eventually got sick of replacing the cheaper pumps when they got noisy. I have found the cheaper ones use more power and get noisy very quickly if they are allowed to suck any air(ie. the water level drops too low).

Good link Sleepe - that'l keep frank occupied for hours

Can anyone explain what the % are referring too?

why the defensive reaction, OBO?
the question was asked in a very friendly way
and out of genuine interest
as I am always looking for better pumps

and the news is not bad:
this is the best performing pump I have found so far, especially at low heads between 1 to 2 m:

Flow at 0.5m: 3900L/hr 65 W 9.62% efficiency
Flow at 1.0m: 3120L/hr 65 W 13.33% efficiency
Flow at 1.5m: 2340L/hr 65 W 15.00% efficiency
Flow at 2.0m: 1680L/hr 65 W 14.36% efficiency
Flow at 2.5m: 780L/hr 65 W 8.33% efficiency

it is outperforming my pumps with an average of 3%
which makes it 20% better

I would not hesitate to label this pump 2008's "best buy"

frank

Just defensive because of your previous posting history frank, Dont want another thread to degenerate.

My total head is 0.75 of a meter (standpipe coming from other side of plumbing, shows how high the water is being pushed).

The next expansion see's the same pump going to around 1.5m, so its pretty good there too
Thanks for the info.

I was thinking of adding another 10000lph to give me 20000lph. Or maybe later if I want to run the pumps to a large holding tank, say 20000ltr. I would just have 2 or 3 pumps quickly fill the tank and then cut off until it drains. Will have to do the math when I get enough gb's on line.

Better than a Messner Eco pump Frank?
Only joking, they cost the world over here

I can stand a little shaking, Sleepe
and a lot of shaking too
so don't hold back

I don't know the Messner Eco pump
but if you do part of the homework and provide me the data
I will finish it and post the results

which show not always to be that dramatic (though still disappointing to me)
but even if 15% is still very poor, especially in view of solar applications
an improvement of 20% is not to be neglected


at least for a few minutes

then I will come back to pester you all if you neglect efficiency

frank

+1
But since most of the pumps we (BYAP) use draw less than 300watts (my top is about 100watts), the current is less than 3 amps. I don't have any extension cords that can't easily carry 10amps, so no worries there. It gets to be a pain with powerful equipment: my nailgun compressor will generally not run on even my best extension cords, but if I had 240V machinery I would have no problem. Of course, I'd need to be more careful when fiddling with open wires, esp in rain etc: the 120-jig (a little dance we do on finding the wire we just cut or touched was live) might become a 240-departure.

Cost is the same: the power company cares about watts, not amps. Transmission losses are greater for more amps, so power companies like to transmit at high amps. Also you can wire a house with thinner wires/less copper/cheaper if you use higher voltage.

(I should really read *all* the new posts before replying. *sigh*)

little giant mfg.

model :pmo700
best as i can remember it was 1000 gph
cost 139,00 on sale at lowes

115v 3.0 amp

new 2000
removed 2005

tried it again last week and it would only hum. spin the impeller and it will start and pump but if you stop it , its done. not sure if it has start capacitor or not but it acts like thats the issue.

now listed as obsolete and no rebuild kit anywhere

my next pump will be able to be rebuilt or at least some repair like impeller replacement

this one had 2 prefilters and went into a bio filter and would pump lots of water but i guess game over now

Thanks Hydro

Johnny
Probably the capacitor, if its not an epoxied pump, you can fix them, just check the cap size. viewtopic.php?p=88116#p88116

Frank

Could not find the specs on the Eco which is supposed to be more efficient, however the Chinese appear to have made an almost exact copy of this http://www.messner-pumpen.de/document_f ... 500_GB.pdf

results for the Messner 4500:
head in m flow@head flow@head pump rating pressure in bar pressure in mbar pump effect pump efficiency
3.500 m 7.5 l/min 450 l/hr 65 watt 0.350 bar 350 mbar 4 watt 6.73%
3.000 m 13.0 l/min 780 l/hr 65 watt 0.300 bar 300 mbar 7 watt 10.00%
2.500 m 20.0 l/min 1200 l/hr 65 watt 0.250 bar 250 mbar 8 watt 12.82%
2.000 m 27.0 l/min 1620 l/hr 65 watt 0.200 bar 200 mbar 9 watt 13.85%
1.500 m 35.5 l/min 2130 l/hr 65 watt 0.150 bar 150 mbar 9 watt 13.65%
1.000 m 52.0 l/min 3120 l/hr 65 watt 0.100 bar 100 mbar 9 watt 13.33%
0.500 m 61.0 l/min 3660 l/hr 65 watt 0.050 bar 50 mbar 5 watt 7.82%

frank

You can get a 4500lph for that amount of watts.

these results are based on the data on the link you provided
it is a 4500 l pump at 65 watts
but at zero head (which is always used to denominate a pump)
don't let yourself be misled by denominations
it is the performance at the head YOU need that counts
not at zero head

frank