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This review is from: Lightobject EWP-DC30A1230 Mini DC Brushless Submersible Water Pump, Ideal for CPU Cooling, 3.6 L/minutes (Misc.)
I bought it to couple into an automotive heater core in a housing, for a couple of computer case fans (3.5", 45 CFM, 0.25A each) to make a low power requirement "air conditioner" for my boat. it oughtta be nice for days when its 100+ outside, we'll see.(its winter, drilling 2 holes into the bottom of a boat's hull is perfectly normal, right?) hopefully if the water temp is 65-70, it'll blow air 5-10 degrees warmer than that, 70-80 is lots nicer than 100+. it'd be a lot of cooling action for under 1 amp worth of battery drain-rate, and the whole project aint gonna cost 50 bucks in materials.
(as friends say "gee why dont ya just jump in?", of course I'm just nutty enough to want more options.)
when I tested the pump it threw a 15-16" high stream of water vertically without any tubing to confine or support it, what a mess and so what..
I think this unit would be great for filling-draining-circulating a livewell too, it'll throw about a gallon a minute, which oughtta be plenty for applying like that, and it draws near nada to power it.
its rated for some 20,000 hours worth of usage, means "forever!" to my intended applications here.
a little pump like this could be used so many ways.
**update** the low power lake temp "air conditioner" is a success, in the other boat as a livewell pump too. as a livewell pump it takes about 8-9 minutes to fill it, but the low energy usage for constant on circulation is nice enough when its full of fish. these pumps will SCREAM if they catch an air bubble to run dry, they do need to be submersed (or inside and below the waterline). the "AC" intake grabbing onto a leaf is just switching it off a few seconds for the leaf to fall away, has happened a couple times but not any kind of real problem. a change of shape for its intake maybe.