3.8L 12V Mini DC Submersible Water Pump for CPU Cooling Small Pond or HHO System

Works OK. Mini in size for sure. Pump must be submerged for it to work correctly- My Mistake, but it didn't specify that.

I bought this pump to do an experiment to see if water could be kept in a liquid state in sub-freezing conditions. The topic of keeping water from freezing came up during a recent winter camp out. So after searching the internet for options I decided to give this method a try. I put two gallon jugs in the freezer (0 degrees F) one with this pump inside the other without as a control. Left over night the control jug was frozen solid but the jug with the pump had an inch of ice around the inside perimeter with liquid water in the center of the jug. The experiment worked but since I needed power to run the pump (I used an old 120VAC to 12VDC converter) it doesn't seem to practical for field use. If you have power just run a small heater to keep the water from freezing, right?So what's all that have to do with the pump? Well it shows that this little pump is pretty tough. It ran for several hours in sub-freezing conditions. It runs well using any old converter you may have lying around and circulates enough water to keep water from freezing. I bought an 8 slot AA battery holder from Radio Shack and using Eneloop rechargeable batteries was able to run the pump for about 6 hours. I think I may use this pump to dispense water from 5 gallon jugs when camping or may just use it to make a small outdoor "water feature". Overall, I'm pretty pleased with the quality and performance of this inexpensive little pump.

i used this pump to squirt some water on the radiator of my car while driving across the rockies, well it lasted 3 times that i turned it on then on the 4th time i had nothing it had just quit so it had a total time of use on it of about 5 minutes it did not even go through a 5 gallon bucket of water. that was $20.00 down the drain so i went to autozone and bought a 12 volt inline fuel pump and got a better pump for $45.00 dollars, oh well live and learn, you get what you pay for

never worked from day one think i got a lemon. would not work with any voltage i tried 1.5 to 12 volts dc

Pro: This is an inexpensive and surprisingly well built pump held together with four screws and an o-ring where most pumps in its class just snap together.Con: It's NOISY! A cross between a buzz and a whine. Certainly not 30db as claimed and not what it's construction would lead you to believe. To be sure there was nothing in it which shouldn't be I disassembled and cleaned it but it did not improve. The seller (lightobject) did not respond to my e-mail.Overall: Go with a FountainPro pump. They were recommended to me by a pro and last next to forever. My last one was that but then it finally broke after many years of service. I'll be buying another. They are quiet unless they get something in them which is easy to clean out by disassembling them and using a Q-tip and flowing water.PS I would have given it one star as I have a small indoor fountain and the sound is annoying but if you need a good cheap pump and noise is no problem this should serve well.

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This pump is very cute/tiny and has a small connector to it, so the volume isn't very high it seems.I am running it on 12V PC power supply (yellow, black) and it provides enough water flow to hold the temperatures constantly low.I use 3/8" tubes on it, much larger than this output has, but still works. It may have problems with air in the tubes at the first startup since the volume it delivers is quite small.The noise level is similar to a pond motor and very quiet. Using it in a bucket, you can reduce sound by uncoupling vibrating tubes or wires from the bucket wall with a sponge.I am using this with a combined cooling of GPU and CPU (gtx560ti, i3770k) and running very smooth at the moment. I will compare if I get more cooling from my old pond motor with more pressure or not. But anyway, this thing is reliable enough for a very cool system.Summary:The pressure is good, the water volume could be higher for more thick tubes.

The dimensions were not correct. The pump dimension are actually smaller than listed on the page.After setting it up for my purpose, it jams up every 30 seconds without any apperent cause. It seems more current dependent and does not do well with pressure. For example, for a power source that is power limited. It runs better at 7.5V than at 12V.i.e. you need to run it at full tilt for it to work. I was hoping to have it pump a little slower but that's not an option since you need to provide all the current that it's rated to.Look for a cheap price and get what you pay for I guess.