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Running a bilge water pump using the power from a wall-socket

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Hemulen

New Member
I am building a self watering garden and want to use this pump to distribute water. The pump does not have a power adaptor, only two wired + and -. it runs on 12V and 3 Amps.
My question is: How can I run this pump using the power from a standard socket in my house?
Could I connect it directly to this power adaptor? By cutting of the plug and exposing and connecting the two wires to the two from the pump. If not, how can I run it from a socket?
Pump:
https://www.ebay.com/itm/1100-GPH-1...bmersible-for-Yacht-RV-SPA-Pool-/182357422398
Power Adaptor (EU plug, 3 amp)
https://www.ebay.com/itm/AC100-240V...hash=item3f600b4c93:m:mgFwrGCSryHL9BJwnUpJG8g

Thank you for helping!
 

Nigel Goodwin

Super Moderator
Most Helpful Member
You 'should' be able to - but a lot depends on the switch-on surge, when the pump will take a LOT more than it's 3A for a short time. But as long as you get the higher rated PSU you may be OK, it's really a matter of trying it and seeing what happens.
 

Hemulen

New Member
Thank you for your answer. So is it a way to avoid the switch-on surge? By PSU, do you refer to the adapter I linked? Could you recommend a PSU that you think would work? preferably Ebay or some online electronics store that ships to Europe.
 

MikeMl

Well-Known Member
Most Helpful Member
I ran a bilge pump to circulate water in my wife's greenhouse. The pump has about a 5A running current and about a 15A startup surge. I used a small 12V lead-acid battery with about a 1A constant-current charger. I built a voltage cutin/cutout circuit that watches the battery voltage, turns on the pump when the battery voltage reaches ~14V, and shuts the pump off when the battery voltage drops to ~12.4V. Since the 1A charger cannot keep up with the pump, it means that the pump runs about 20% of the time, and it cycles on/off about 5 times per hour.

If you run the bilge pump continuously, it will not last long...
 

Hemulen

New Member
Great, I have bought the 8A version now. I plan to switch it on and off with a time controlled outlet, so it runs for a couple of minutes each day. I guess this wouldn't wear out the pump.
 

Reloadron

Well-Known Member
Most Helpful Member
Great, I have bought the 8A version now. I plan to switch it on and off with a time controlled outlet, so it runs for a couple of minutes each day. I guess this wouldn't wear out the pump.
As long as the pump has a supply of water to pump. You don't want to run the pump dry or it will be short lived.

Ron
 
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