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High pitch whine in new loop

post #1 of 31
Thread Starter 
So I finally finished putting my first custom loop together, filled the res, and let it pump through and continued to top it off. However now I am getting a really high pitched whine that I can't get rid of. It starts doing it after a few minutes of running. Any help? Also, should I be able to hear the water moving through the tubes?
Edited by Simsim - 4/11/14 at 10:06pm
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post #2 of 31
What pump are you using?

You shouldn't be able to hear the water though the tube, unless your moving mountains of water.
post #3 of 31
I'm also getting that. Put something over your pump to stop the whining. it does not have to be very thick. That's the only way I have found to fix it.
post #4 of 31
Thread Starter 
Quote:
Originally Posted by ryanallan View Post

What pump are you using?

You shouldn't be able to hear the water though the tube, unless your moving mountains of water.

D5 vario with white EK acetal top. I didn't think that I should be able to hear it.
Quote:
Originally Posted by Neb9 View Post

I'm also getting that. Put something over your pump to stop the whining. it does not have to be very thick. That's the only way I have found to fix it.

I'll have to try that. Am I right in assuming that I should be trying to fill the loop up completely?
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post #5 of 31
I have a MCP35X, and it's pretty noisy.

I've turned the speed down, almost to min, and it's just barley tolerable.
post #6 of 31
A D5 should be completely silent if installed properly, once the loop is bleed properly.
Try and take your pump off it's mounted spot, and let it hang loose, with some rags between the pump and the case.
If the noise stops, it was because your pump was not decoupled properly.
You can just mount your pump on a piece of heavy duty velcro and no screws at all. The velcro will hold the pump in place while preventing the pump to vibrate your case, nd get all noisy on ya.

And yeah, your loop should be filled entirely with water, no air pockets or bubbles trapped in the rads.
Until the loop is fully bleed, the pump won't be completely quiet.

I was testing a defective pump in the kitchen sink at one time.
The pump would turn on and off intermittently. Until it would stop running completely.
So I put it on the counter, and went about my work.
Came back 3-4 hours later and the pump was running again....on air, no water in it.
Needless to say, it was ruined. When it stopped running, I had left it there without thinking of unplugging it.

It still runs, but makes a very annoying loud whine.

Could that have happened to yours?
Have you run your pump with no water going into it?
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post #7 of 31
Quote:
Originally Posted by ryanallan View Post

I have a MCP35X, and it's pretty noisy.

I've turned the speed down, almost to min, and it's just barley tolerable.

DDC pumps are louder.than D5 pumps, but still not that loud.
You probably didn't decouple it properly. Keep it plugged into your loop while it's unscrewed from it's mounted spot.
Run your loop while holding your pump in your hand, or having it sit on rags in your case. If it gets much better, you need to decouple your pump.
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post #8 of 31
Thread Starter 
Quote:
Originally Posted by PepeLapiu View Post

A D5 should be completely silent if installed properly, once the loop is bleed properly.
Try and take your pump off it's mounted spot, and let it hang loose, with some rags between the pump and the case.
If the noise stops, it was because your pump was not decoupled properly.
You can just mount your pump on a piece of heavy duty velcro and no screws at all. The velcro will hold the pump in place while preventing the pump to vibrate your case, nd get all noisy on ya.

And yeah, your loop should be filled entirely with water, no air pockets or bubbles trapped in the rads.
Until the loop is fully bleed, the pump won't be completely quiet.

I was testing a defective pump in the kitchen sink at one time.
The pump would turn on and off intermittently. Until it would stop running completely.
So I put it on the counter, and went about my work.
Came back 3-4 hours later and the pump was running again....on air, no water in it.
Needless to say, it was ruined. When it stopped running, I had left it there without thinking of unplugging it.

It still runs, but makes a very annoying loud whine.

Could that have happened to yours?
Have you run your pump with no water going into it?

The pump only starts getting the whine, after a few minutes of running it. I think there might be some air in the loop, because when the noise gets real bad it sound like it's out of water and the water in the res goes down.
Quote:
Originally Posted by PepeLapiu View Post

DDC pumps are louder.than D5 pumps, but still not that loud.
You probably didn't decouple it properly. Keep it plugged into your loop while it's unscrewed from it's mounted spot.
Run your loop while holding your pump in your hand, or having it sit on rags in your case. If it gets much better, you need to decouple your pump.
The pump is connected with Velcro so I should be able to try this, what do you mean by the pump not being properly "decoupled"?
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post #9 of 31
Quote:
Originally Posted by Simsim View Post

The pump only starts getting the whine, after a few minutes of running it. I think there might be some air in the loop, because when the noise gets real bad it sound like it's out of water and the water in the res goes down.
The pump is connected with Velcro so I should be able to try this, what do you mean by the pump not being properly "decoupled"?

If you screw the pump into the case, the pump will transmit it's motor vibrations to tge case and that will make some noise. But if you mount the pump on a Velcro, or on a piece of foam, it won't transnit vibrations and will be a lot more quiet that way. This is what decoupling is.

Can you adjust your pump speed?
If so, at what speed is it when it starts to get noisy?
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post #10 of 31
And how much time have you let it run like this when it starts to whine?

If the pump is hitting an air pocket, or if cavitation is going on, you shouldd shut the pump off as soon as you hear the noise.
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