Backyard Aquaponics
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Mentioned this one some time back and was told how bad it was - times are changing:

Jebao 3000 sweet spot:

2,100 l/h @ 1m @ 35 Watts ~ 16.67% efficient

I don't know what it is with these particular pumps but even strapping a couple together (at the sweet spot ~ 1m) seems to outperform most larger pumps?

Actually the sweet spot is 1.5m not 1.0m:

1,700 l/h @ 1.5m @ 35 Watts ~ 20.24% efficient

my pump choice quandry persists. if i was down under i would order
a quality pump from our host. but im not and dont trust my mailman
to get my electric bill 11 kilometers up the highway on time

im in rural part of florida. more cows than humans so no stores except walmart , lowes and home depot within 30

walmart has these http://www.walmart.com/search/search-ng.do?search_query=pump&search_constraint=0&tc=0&ic=48_0&ref=+125862.415943&tab_value=105_All

i figured i would go ahead an order the biggest one as its not much more cost than the 1250 gph and has free shipping

has anyone seen these before. im thinking they are the newer model little giant brand?

or can you herd me toward a domestic usa supplier of better pumps? i would like to purchase one i can rebuild when the time comes if at all possible

opinions and suggestions needed. thanks you all johnny

Johnny,
I saw these pumps at my local store and so inquired for you :-)
according to my local pump bloke, even though they look identical to his, his are copies of a very good German brand (forget which) some of them are very good, some are poorly constructed.
Walmart considerately does not give you the brandname so we're buggered here. Walmart is also still waiting for customer testimonials on those pumps so no help there.
Chinese pumps have been copying the outside shell of good pumps for years, in order to A: steal the design B: steal the reputation. All I can suggest is you visit (your mention of shipping make me think you're too far) and get the brand name, or just suck it and see...



That's the Walmart Way!

thanks kuda and sleepe

i decided against anything from walmart. i really dont like walmart and thought back about other things i bought there .

i found a real vendor that also offers free shipping and has a myriad of better pumps.

im going to spend the money and get the best pump i can even if it costs somewhat more, just becuase i have enough variables in play without an "iffy" pump

http://www.azponds.com/subpumps.htm#powerjetpump

these even have data listed

Any of them pumps are ok

Excellent news Johnny... yeah those pumps all look good. I have the pondmaster one, about half way down, still in testing though so can't give it a commendation above that it pumps what it says it will.

i still dont have a pump

im now thinking ill try some offering from the plumbing dept. at lowes . they are for most part the same prices as petshop plastic pumps sometimes less.

most are at least steel if not cast iron. that beats plastic imho. most have long cords also. i need 20' cord and 115v. and most gph i can get with the least power consumed. it will be on timer. so yes i also need a timer that will plug into a weatherproof outdoor electric box.

the pump is heart if our systems and its sure not easy shopping for a good heart



all i need is a veteran of our pump thread for about 15 minutes to just walk in and point at one and i would purchase it immediately if not sooner hahaha.

happy new years to all of you. johnny

Hey Johnny, you might be interested in the following statement, it's from the Speraneos manual, and they use many of them in their systems:

much thanks for this link. yes it helps me a lot. im on lowes website now. they have uge amount of pumps and true to form list no data on anything . if one is lucky you get gph and a price.

i had not even thought about sears. i once heard that gould made the pumps that they offer but im not sure.

im trying to work a trade right now for a gas driven pump made by pacer. i want backup for when the power is out around here which is pretty frequently. its not reliable even when its sunny and calm

much thanks again to you earthbound

i think this is it
http://www.sears.com/shc/s/p_10153_12605_08303050000P?sid=BVReview

it sure sounds pretty good and long lived from the reviews. cord is short but a longer cord could be installed (maybe) or properly weatherproofed extension


my father and uncle would be ashamed of me for not knowing much if anything about pumps being as they were both master plumbers and well drillers.

all i know about pumps i have learned from you fine folks here. this pump has the float switch arrangement and that confuses me if im even able to use such pump type as im not using a sump on my system

my pool is 32" deep and that wont allow the other well pump type the one with the motor on the top end, to stay dry.

i guess im going to be forced to purchase a aquaria type submersible afterall. i really dont want to do that if i can find something else. i have had such crappy luck with the little giant brand and thats about all thats around here at lowes and home depot and then the china clones of the same type at walmart

im going to lowes and subdue the plumbing guy(if i can find an employee) for answers and options this morning. camo and rubber boots should frighten them enough to be helpful

"charles mansons cousin came in today looking for pump info" he will be saying in the breakroom

usually i have to mill around in the deserted aisles until security guy arrives then confront him for some salesperson help.

sometimes i get a product and just sit down on the floor and open the box and pull out my 2 magnifier glasses and start reading directions and putting stuff together. that always gets me some assisitance hahaha.

blind hoodlum aisle 2! FTW!

let's post some good news for a change:

this is indeed a good pump:
0.010 m 248.0 l/min 14880 l/hr 373 watt 0.001 bar 1 mbar 0 watt 0.11%
1.524 m 229.2 l/min 13752 l/hr 373 watt 0.152 bar 152 mbar 58 watt 15.61%
3.048 m 210.4 l/min 12624 l/hr 373 watt 0.305 bar 305 mbar 107 watt 28.66%
4.572 m 187.9 l/min 11274 l/hr 373 watt 0.457 bar 457 mbar 143 watt 38.39%
6.096 m 187.9 l/min 11274 l/hr 373 watt 0.610 bar 610 mbar 191 watt 51.18%
7.620 m 161.6 l/min 9696 l/hr 373 watt 0.762 bar 762 mbar 205 watt 55.02%

this is far better than anything found so far

the table also shows this pump was designed for heads around 7 m, where it performs best
but the performance at 1.5 m, though only 15%, is still comparatively outstanding

anyway, this example shows that good pump performance is not a dream
rests us to find a pump that is really designed for 1 to 2 m head,which is what we mostly need

frank

Just to add to the confusion here are the L/Whr figures.

0m head 40.3L/Whr
~1.5m (5') 37.3L/Whr
~3m (10') 34.2L/Whr
~4.5m (15') 30.5L/Whr
~6m (20') 28L/Whr

By these figures I would conclude that this is an inefficient pump relative to many of the other options that have been posted in this thread and the pump efficiency thread. viewtopic.php?f=8&t=4661&st=0&sk=t&sd=a&start=270

maybe the table below will bring some illumination:
remember how my reluctance towards the l/w expression was based in the fact that it doesn't give a reference?
unlike the energy efficiency expression in %, which always shows you where you stand in relation to 100%

I have calculated the best possible results in l/w for different heads
I used a 100 w pump to make equations simpler to understand
but you can do this for all other pumps, the best possible results in l/w will stay the same

0.100 m 6000.0 l/min 360000 l/hr 100 watt 0.010 bar 10 mbar 100 watt 100.00% 3600 l/w
0.200 m 3000.0 l/min 180000 l/hr 100 watt 0.020 bar 20 mbar 100 watt 100.00% 1800 l/w
0.300 m 2000.0 l/min 120000 l/hr 100 watt 0.030 bar 30 mbar 100 watt 100.00% 1200 l/w
0.400 m 1500.0 l/min 90000 l/hr 100 watt 0.040 bar 40 mbar 100 watt 100.00% 900 l/w
0.500 m 1200.0 l/min 72000 l/hr 100 watt 0.050 bar 50 mbar 100 watt 100.00% 720 l/w
0.500 m 1200.0 l/min 72000 l/hr 100 watt 0.050 bar 50 mbar 100 watt 100.00% 720 l/w
1.000 m 600.0 l/min 36000 l/hr 100 watt 0.100 bar 100 mbar 100 watt 100.00% 360 l/w
1.500 m 400.0 l/min 24000 l/hr 100 watt 0.150 bar 150 mbar 100 watt 100.00% 240 l/w
2.000 m 300.0 l/min 18000 l/hr 100 watt 0.200 bar 200 mbar 100 watt 100.00% 180 l/w
2.500 m 240.0 l/min 14400 l/hr 100 watt 0.250 bar 250 mbar 100 watt 100.00% 144 l/w
3.000 m 200.0 l/min 12000 l/hr 100 watt 0.300 bar 300 mbar 100 watt 100.00% 120 l/w
3.500 m 171.4 l/min 10284 l/hr 100 watt 0.350 bar 350 mbar 100 watt 99.98% 103 l/w
4.000 m 150.0 l/min 9000 l/hr 100 watt 0.400 bar 400 mbar 100 watt 100.00% 90 l/w
4.500 m 133.3 l/min 7998 l/hr 100 watt 0.450 bar 450 mbar 100 watt 99.98% 80 l/w
5.000 m 120.0 l/min 7200 l/hr 100 watt 0.500 bar 500 mbar 100 watt 100.00% 72 l/w
5.500 m 109.0 l/min 6540 l/hr 100 watt 0.550 bar 550 mbar 100 watt 99.92% 65 l/w
6.000 m 100.0 l/min 6000 l/hr 100 watt 0.600 bar 600 mbar 100 watt 100.00% 60 l/w
6.500 m 92.0 l/min 5520 l/hr 100 watt 0.650 bar 650 mbar 100 watt 99.67% 55 l/w
7.000 m 85.0 l/min 5100 l/hr 100 watt 0.700 bar 700 mbar 99 watt 99.17% 51 l/w

this table shows that, while best possible result expressed in % stays 100 %,
best possible results expressed in l/w diminishes with head

compare 120 l/w with 1800 l/w:

you might think pump 1 that does 120 l/w @ 3 m
is doing MUCH worse than pump 2 that does 1800 l/w @ 0.1 m

say 15 times worse

while pump 1 has 100% efficiency and pump 2 only 50 %

so instead of 15 times worse, pump 1 performs twice as good as pump 2

frank

I think that might be pure coincidence.. I remember discussions on the S&S forum about their pump selection, and why they currently use the ones they do. It related mainly to the reliability and longevity of the pump, as well as serviceability and warranty length.

I guess if you've tried 11 different pumps in 10 years or so of AP experimenting, you've probably come across many duds, and a pump that LASTS is more important... I see this as one of the major issues with looking only at power consumption, because in reality we should perhaps replace almost every mention of "efficiency" on these threads with "power consumption", or "energy efficiency".

Power consumption is not so important in cases where longevity of the pump comes into serious disrepute. I have a stack of pumps of all shapes and sizes in my shed, if any of them happen to have a good "energy efficiency" rating, I don't care, they have all let me down.

Luckily, as a general rule, the poorer build quality a pump is, the less energy efficient it is as well, but I doubt that this can be taken as gospel, just a general rule of thumb.