Electric Pump For Water?

Question

I need to find a cheap, reliable electric pump to buy that can pull water from a fishtank and put it back in. It doesn't need too pump very much water (will be operating out of a 1-2 gallon tank). Cheap is the biggest requirement, because I need to buy 4-5 of them. Also, I need it to run on DC, and needs to be able to take varied voltage input. This is because I have a program controlling the speed the pump goes by increasing or decreasing the DC voltage output based on other variables. I am using it for a science project. Thanks to people who answer!

Edit: By cheap, I mean 5-10 dollars, but anything close is probably fine.

Answer 1

You can use a 12Vdc Marine Bilge pump (Rule 25D). Other DC pumps used in environmental sampling are available as well (see link geoscientific).

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Consider a windshield washer pump. You can find these in auto parts stors and they are pretty cheap. Though the flow rate may be small for your application.
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Water pumps are now being used to cool PC's. Look for a cooling pump for a PC. (probably 12vdc)

Solar Key offers a 6vdc pump for $15.00 Try looking for a pump for solar powered applications.


Edit: Added links for some cheap washer pumps

Answer 2

properly your mechanical water pump is more suitable than sufficient to pump water via your engine even at low rpms. even if you've a electric powered or mechanical your won't be able to pump extra water notwithstanding your engine than what your thermostat will enable you to. The benefit that i can see over electric powered must be the more suitable horse capacity you would get over having your mechanical

Answer 3

Jabsco is a good and probably pretty cheap. Sheck online at marine supply places like West Marine or Fisheries Supply. Also check your local boat dealer for bilge or livewell pumps.