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Old 01-19-2011, 07:22 PM
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kimosaubi kimosaubi is offline
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Default 12 volt well pump/fuel pump



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I am looking for a back up 12 volt well pump but do not want to spend $600-$800 for another one..

What do you think of a car fuel pump?? 12 volts at 40 psi they will pump 40gal an hour.. Not sure if they will push the water 50-60 feet up the well.. But can get one for under $200

They are small enough to fit down my casing without pulling the 220 volt pump..

What do you think or has anyone tried an automotive pump??
Old 01-19-2011, 08:03 PM
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375H&H 375H&H is offline
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Take a look in the Northern catalog. They have some for around $90.
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Old 01-19-2011, 08:18 PM
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Quote:
Originally Posted by kimosaubi View Post
...What do you think of a car fuel pump?? 12 volts at 40 psi they will pump 40gal an hour...

12V @ 40 PSI is some sort of engineering math?
Quote:
Originally Posted by kimosaubi View Post
.
"...will pump 40gal an hour!!!"..
WTF is going on?

A normal CAR can get 20Mpg or more...

At 40Gallons consumption per hour...

......


You are driving the average American Vehicle 800 Miles per hour!!!


.... And ... NO ....

another lame ass reply with no bases in real math and pjysiscs.
 
Old 01-19-2011, 08:21 PM
Trotline Trotline is offline
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A car fuel pump will probably pump for a long time if left on constantly pumping water. They are made to pump gasoline which acts as a lubricant inside the pump.

If used repetedly the water that sits in there will rust it up after a few uses.
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Old 01-19-2011, 08:22 PM
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I would look at 12v Bilge Pumps......
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Old 01-19-2011, 08:25 PM
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Pumps are generally designed with a fairly specific purpose in mind.

The reason your water well pump costs nearly a grand is because it's
got the stones to push water up against a couple hundred feet of
pressure head. All your car fuel pump has to do is move some gas
from your tank to the engine a provide whatever pressure is needed
for your carb or fuel injectors. Admittedly, I haven't tested it, but
I would be surprised if a typical fuel pump could muster more than
about 20 feet of pressure head before it reached an equilibrium
point (pressure output of the pump = pressure head of the height
of the fluid.)

But let's find out. Warning: Engineering dork alert:
.... ok, according to wikipedia, fuel pumps generate about 10 to 15 psi.
A cubic foot of water =... (don't recall exactly) say 62.4 lbs per cubic
foot. One square foot = 144 square inches, so 62.4 / 144 = 0.43 psi
of pressure per 1 foot height of water. So if your pump puts out 15 psi,
and one foot of water exherts 0.43 psi,... OK, a bit higher than I thought.
15 / 0.43 = 34. You can get a pressure head of 34' from your pump.
But that's it. You can pump to 34' in height, but you'll have zero additional
pressure left over at that height to do anything else (push through a pipe
or hose, etc.)

A manual well pump can pull water from 25' to 27' maximum depth.
Seems like you would be better off going with something that's
designed to do the job you want to do.

And there's possible issues with fuel pumps maybe being lubricated by
the fuel they pump, and running water through them will chew them
up somehow, but that's just pure speculation on my part.
// edit -- and answered by Trotline, who got in here ahead of me
as I was crunching numbers.


Interesting idea though.
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Old 01-19-2011, 08:31 PM
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The pump on the Northern site that will work is $849. For any one else, the high pressure pump is required to move the water up the well 50ft. the gal. per hour is a max at that pressure for the automotive fuel pump..

Any real help would be appreciated..

PA-Series Fuel Pumps 40 to 100 PSI
From Tanks, Inc.



The pumps listed are capable of running anywhere from 40 to 100 PSI and they will deliver a varying amount of fuel (gallons per hour) depending on the pressure. We have recorded the GPH at 30, 40, and 60 PSI as a guide to finding the correct pump for your particular installation. In addition, you can use the following list as a general rule of thumb for some of the more common engine swaps. Click Here For Installation Instructions

Note: "TANKS" 35M, 37M, and U-T poly tanks do not require the "P" suffix.

Note: Our kits do not include pressure regulators.

Note: All flow rates are rated at 13.5 volts.





No Welding Required - Components just bolt together.

You assemble to the depth of your tank and install
Stainless Steel Reservoir Tray
Supply Line
Return Line
Vent Opening
In-Tank Wiring Harness
Threaded In-Tank Mounting Ring (plated steel)
Heavy Gauge Mounting Plate
Adjustable Support Arm (plated steel)
Genuine Walbro Fuel Pumps are supplied
Pump Flow Rates:

TBI 109 Liter Per Hour Pump

29 GPH @ 12 PSI
Deluxe 190 Liter Per Hour Pump

54 GPH @ 40 PSI
50 GPH @ 50 PSI
48 GPH @ 60 PSI
High Flow 250 Liter Per Hour Pump

68 GPH @ 40 PSI
65 GPH @ 50 PSI
62 GPH @ 60 PSI
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Old 01-19-2011, 08:36 PM
biathlon biathlon is offline
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Look these foollks up in Orofino. http://www.backwoodssolar.com/
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Old 01-19-2011, 08:47 PM
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biathlon might have found it for me... 100' max. vertical lift and choice of 12 or a 24 volt..
I wish I had asked before we got the other, this looks like a good back up and only $160

Happy camper

Last edited by kimosaubi; 01-19-2011 at 08:49 PM.. Reason: edit
Old 01-20-2011, 02:01 PM
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Quote:
Originally Posted by kimosaubi View Post
The pump on the Northern site that will work is $849. For any one else, the high pressure pump is required to move the water up the well 50ft. the gal. per hour is a max at that pressure for the automotive fuel pump..

Any real help would be appreciated..

Why doesn't this work for you? Maybe I'm missing something.

http://www.northerntool.com/shop/too...27?cm_vc=C5503

Item# 52063

Only $89.99


Staff Answer
A:
Yes, this pump will self prime a height of up to 12 ft above liquid level and push water up to 120 ft above liquid level. Keep in mind that the farther above liquid level the fluid is pushed the lower the gpm output of the pump will be. When figuring the head on a pump only the rise is taken into consideration.
by
ProductExpert13
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Old 01-20-2011, 04:10 PM
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I need to lift the water a minumum of 50ft, the pump you show has to sit above the water and pull and it will only pull 12ft.. The other pump will go into the water and push it the 50ft up ...

Pumps can push more than they can pull plus when pulling water you have to worry about the hose collapsing from the suction..

thanks for helping though...
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