Undervolting DC pump

[lovefish77]

I am running a jebao dc-8000 (it is a DC pump) return pump on my 75 and I am running the risk of overflowing the tank if power goes off and it goes to highest setting after it resets. Was thinking of undervolting the pump like running it at 18v instead of 24v (using variable volt adapter designed for laptop) to lower the output a bit. Any thoughts? Will this burn the pump long term?


thanks for looking

 

[theMeat]

The pump will come back on to previous setting.

What type of overflow?

 

[lovefish77]

cpr with two drains (~1200gph max), once reset happens, pump goes to highest setting (I run it at # 1 and it resets to #10) thus risking flooding.

 

[theMeat]

Weird. My jebaos come on to previous setting.

Hang on? Hang on back is a flood waiting to happen.

Get one of these. Has an extra emergency drain and runs dead silent.
https://www.bulkreefsupply.com/16-s...MIlcex3fL81QIVmLjACh0eVw4sEAAYASAAEgK1SPD_BwE

Also want a siphon break at top of return line, right below water line.

 

[lovefish77]

thanks, but I am not considering changing the overflow, wont solve the problem I guess. Just interested to know what long term impact undervolting has on the pump. The newer jebao controllers reset, the old ones don't I guess.

 

[edd]

if your only running it on 1, why not buy a smaller, newer pump that resets.
i wouldnt leave the house untill its straightened out

 

[lovefish77]

thanks edd, I know that is another option. But that is not the question I was asking; undervolting effect on pump life, any thoughts on that? I just know all the options that people proposed but I am here to ask about something else. Gets frustrating when you come here asking something, but everyone gives answers that are totally irrelevant to the question. Don't get me wrong please

 

[theMeat]

Why not just get flood insurance and not worry about it.

 

[lovefish77]

I am renting and power doesn't go out usually, thanks for the insurance note though.


"I am running a jebao dc-8000 (it is a DC pump) return pump on my 75 and I am running the risk of overflowing the tank if power goes off and it goes to highest setting after it resets. Was thinking of undervolting the pump like running it at 18v instead of 24v (using variable volt adapter designed for laptop) to lower the output a bit. Any thoughts? Will this burn the pump long term? "

 

[edd]

sorry but dont know if lowering voltage will damage pump.

 

[theMeat]

Why not get another cpr hang on overflow. The chance of one failing and flooding the place is inevitable. But the chance of two failing at the same time much better.

 

[lovefish77]

Why not get another cpr hang on overflow. The chance of one failing and flooding the place is inevitable. But the chance of two failing at the same time much better.

thanks for the thought, but I don't think the risk I am discussing here is potentially from a faulty CPR overflow, it is something else (pump).

 

[theMeat]

It's not a matter of faulty. It's a matter of it depends on an aqua lifter to keep air out of the tube and that line must stay clear.

In my limited understanding of dc motors they have to be somewhat close in order to come on and function properly. Being that the jebao comes on slow and speeds up to speed don't think that will be an issue. Althou the issue could be that the controller senses the limited power and shuts it down. Whether it works or not don't think it will be a good long term reliable solution.