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Old 01-10-2013, 03:41 PM   #1
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Opinions on an efficient water pump

In my opinion my Sureflo Revolution bypass water pump is highly inefficient. The power specs show up to a 6.8 amp draw with the water flow restricted for conservation. Example: the oxygenics shower head is throttled down for a decent water saving shower causing the pump to run for a few minutes in high amp restricted bypass mode. If I did the Lowes 2.5 gal expansion tank with an efficient high flow pump the pump should run a few seconds then be off a minute then on a few seconds again. I have to imagine this would use much less electricity. Anyone experiment with pumps to see which is the most energy efficient?

Jeff
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Old 01-10-2013, 04:29 PM   #2
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I concentrated my energy savings on the 25 or so incandecent lights, 14 floresents, and the 2 CRT TVs.

Went with all LEDs and 2 LED TVS. Energy savings was in the 85% range. I never gave much thought to the pump as it's the leased use 12v appliance in the coach.
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Old 01-10-2013, 04:31 PM   #3
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I concentrated my energy savings on the 25 or so incandecent lights
All ready did the led conversion. Unreal how much an incandescent bulb draws.
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Old 01-10-2013, 04:42 PM   #4
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Yep, the average is 1.0amp vs. 0.1amp on the bulbs. Not going to worry about the pump until it goes south as it does as good as most city water hook ups. I do believe an expansion tank would help though.
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Old 01-11-2013, 02:53 PM   #5
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With out actually using a ammeter on it there is no way to know exactly what it really uses and specs are "max current". This is because the start up inrush current is higher than with it actually running, therefore it is very inefficient to have it short cycling, get the surge/accumulator tank.
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Old 01-11-2013, 03:02 PM   #6
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Originally Posted by unyalli View Post
In my opinion my Sureflo Revolution bypass water pump is highly inefficient. The power specs show up to a 6.8 amp draw with the water flow restricted for conservation. Example: the oxygenics shower head is throttled down for a decent water saving shower causing the pump to run for a few minutes in high amp restricted bypass mode. If I did the Lowes 2.5 gal expansion tank with an efficient high flow pump the pump should run a few seconds then be off a minute then on a few seconds again. I have to imagine this would use much less electricity. Anyone experiment with pumps to see which is the most energy efficient?

Jeff
Pumps are made to run, not start. Starting a pump causes a high inrush current that can be higher than the total when it is running a few minutes. Also, the hardest thing on a pump and its quickest killer, is a short start/stop cycle, ie: running doesnt kill a pump, starting does.
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Old 01-11-2013, 03:04 PM   #7
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With out actually using a ammeter on it there is no way to know exactly what it really uses and specs are "max current". This is because the start up inrush current is higher than with it actually running, therefore it is very inefficient to have it short cycling, get the surge/accumulator tank.
Agree, get an accumulator tank (pressure tank)..
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Old 01-11-2013, 03:27 PM   #8
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Agree, get an accumulator tank (pressure tank)..
How would this work then? Would I adjust the pump so it doesn’t do the bypass thing?
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