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Home: KOI Talk: Pond Construction & Water Filtering System:
Newie on Pump Flow Rate

 





 


bgoh88
Koi Lover

Nov 13, 2007, 2:30 PM

Post #1 of 6 (1431 views)
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Newie on Pump Flow Rate Can't Post
Not sure is this the right place to post for these questions. Need advise from everyone cause I am very confuse on this.

1) What is the different between a power head (or pump) with a output of 4,000l/h (size of output 1/2", low power consumption) compare to that of a power head (pump) with the same output but bigger output size (1", high power comsumption)
Is these the same as at zero (0) height the output is 4,000l of water after an hour? Am I right to say the only different is the distance/height of the pump capable of pumping?

2) Is there any different with the following lay out of pump in term of output? Please see attach drawings. Which one will provide a higher output of water?
Attachments: Pump.JPG (22.2 KB)


tancho_boy
Koi Lover


Nov 15, 2007, 10:46 AM

Post #2 of 6 (1401 views)
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Re: [bgoh88] Newie on Pump Flow Rate [In reply to] Can't Post
In Reply To
Not sure is this the right place to post for these questions. Need advise from everyone cause I am very confuse on this.

1) What is the different between a power head (or pump) with a output of 4,000l/h (size of output 1/2", low power consumption) compare to that of a power head (pump) with the same output but bigger output size (1", high power comsumption)
Is these the same as at zero (0) height the output is 4,000l of water after an hour? Am I right to say the only different is the distance/height of the pump capable of pumping?

2) Is there any different with the following lay out of pump in term of output? Please see attach drawings. Which one will provide a higher output of water? 1) dun wanna seem like a know-it-all, but from my POV, pump spec are when at zero level, thus it can be quite tricky deciding the right pump. thus a pump with same volume and bigger output would give u better volume against head (resistant to water) either tru hieght, distance of water pumped to output, or size of your pipings. generally pumps with higher head resistance are power consuming. 2) definitely method 2 seems the natural best layout, assumming its gravity fed, as output is very near to pump, so not too many head for the pump.


Roger89
Koi Lover


Nov 28, 2007, 5:43 PM

Post #3 of 6 (1337 views)
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Re: [bgoh88] Newie on Pump Flow Rate [In reply to] Can't Post
Hmm lets see. I'm not so sure if I got your questions right.

1) Did u mean output size with pipe size? say a pump with same water output(4000Lph), the different power consumption is probably affecting the pressure the pump is able to exert. Thereby if it consumes more power, the pump has more pressure, and its max head flow is more(meters).

If the outlet of the pump is at water level(0 distance in height) then the outflow should be 4000Lph, but you need to consider the piping you have. The pipe diameter, length, number of elbows etc which all create friction - reduce outflow.

2) Common sense will tell me the drawing 2 would be better. Pumps are usually placed at the end of any filter chamber. What will there be in the inflow/outflow at the outside of the pond in that drawing?


bgoh88
Koi Lover

Nov 29, 2007, 10:13 AM

Post #4 of 6 (1313 views)
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Re: [Roger89] Newie on Pump Flow Rate [In reply to] Can't Post

Thanks for your advise Roger89,

1) What I mean,
a) pump with rating - flow 4000l/h, power 80W, output pipe size 1/2"
b) pump with rating - flow 4000l/h, power 200W, output pipe size 1"

If I'm placing a pump at 0 (zero) height, is there a different between the 2 pumps at the output in term of flow.

2) There is nothing at the outside of the pond, the aim is to creat water flow.


Roger89
Koi Lover


Nov 29, 2007, 2:24 PM

Post #5 of 6 (1296 views)
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Re: [bgoh88] Newie on Pump Flow Rate [In reply to] Can't Post
There shouldn't be a difference in output. You should refer height as the distance in verticle height between the water surface(not the pump level in the water) and the mouth of the outflow pipe. I think the difference between the two pumps is the max head distance(pressure).


ahtan40
Koi Lover

Feb 22, 2008, 11:34 PM

Post #6 of 6 (994 views)
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Re: [Roger89] Newie on Pump Flow Rate [In reply to] Can't Post

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