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Losing water very slowly

post #1 of 15
Thread Starter 
Had a minor scare today. Lost all flow in the loop and my warning buzzer went off so I knew to shut the pc down. It's good to know that my motherboard can properly monitor the flow rate and let me know when ****'s all wonky. Turns out I've been losing water veeeeeeery slowly, and the volume wasn't being replaced by air (weird). This meant that the pressure in the system was a good bit lower than atmospheric and the length of tubing leading back to the reservoir collapsed under the pressure. When I opened up the reservoir during my investigation into the loss of flow, with the pumps running but still no flow, air rushed into the reservoir, the water level dropped, and the tube regained most of its shape. It's running fine for now, but I will be replacing the tubing, and possibly changing reservoirs to something more easily filled and monitored.

Any idea where the water could have gone? It's only an ounce or so and it was about 9 months since I last filled the system. The fillport I put on hasn't worked out as planned, though. An ounce of water lost over the course of 9 months isn't bad, but I was under the impression that I built a closed system. Not sure where those water molecules decided to go.
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Mr. Bubbles
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post #2 of 15
Likely evaporation, you may consider using tubing that won't absorb water as much.
post #3 of 15
I dont know what could have caused the negative pressure, but it certainly was not the result of a missing once of water. You would need at least a cup of water missing to see tubes collapsing.
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post #4 of 15
Thread Starter 
The tube that collapsed was the return tube to the res/pump. I have the Koolance RP401x2 with dual pumps. That's a lot of suction applied to the tube. When I opened the res and the air rushed in to balance out the pressure, the water level only dropped about 1/4 inch. I didn't have to add more than a 1/4 cup of water to top it off. Given the dimensions of the res, I guess it is a good bit more than an ounce, but it's hardly a full cup, especially considering the maximum capacity of the res is only 5.4 fl. oz.
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Mr. Bubbles
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post #5 of 15
Quote:
Originally Posted by Electrocutor View Post

Likely evaporation, you may consider using tubing that won't absorb water as much.

Correct, tubing absorbs water and it evaporates out of the loop.

For example, Tygon R-3603 absorbs 0.24% of water in it over 24hrs at 23C.
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post #6 of 15
Thread Starter 
Interesting. Thanks Duckie. Any recommendations on tubing? I'm thinking of going clear and with dye. Also any tips on how often to top off fluid levels?
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post #7 of 15
Quote:
Originally Posted by tippy25 View Post

Interesting. Thanks Duckie. Any recommendations on tubing? I'm thinking of going clear and with dye. Also any tips on how often to top off fluid levels?
Tygon or primochill will be fine. Some people even using tubing from a local hardware store.
I might have to fill my loop every month to two months.(maybe longer) I like to have the res to be full to the brim if possible.
I prefer to use color tubing in my loops. I would recommend using mayhems dye since people are having good results with them.
I had a bad experience with feser 1 since then I just use distilled water with pt nuke or a silver coil.
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post #8 of 15
Durelene is great as far as clear tubing and its cheap.

Ive been using it for a few months now with excellent results!

http://www.sidewindercomputers.com/dupvctu7id5o.html
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post #9 of 15
Quote:
Originally Posted by nyk20z3 View Post

Durelene is great as far as clear tubing and its cheap.

Ive been using it for a few months now with excellent results!

http://www.sidewindercomputers.com/dupvctu7id5o.html

I use Durelene as well. It stays clear the longest of all the tubing I have used.
Tygon will cloud over time and so will primochill. I've used both and replaced both rigs with those with the Durelene Tubing and using Mayhems dye. I only use about 5 drops to 2 litres of water.

Still need PT Nuke and SilverCoil tho..
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post #10 of 15
Quote:
Originally Posted by solara2xb View Post

I use Durelene as well. It stays clear the longest of all the tubing I have used.
Tygon will cloud over time and so will primochill. I've used both and replaced both rigs with those with the Durelene Tubing and using Mayhems dye. I only use about 5 drops to 2 litres of water.

Still need PT Nuke and SilverCoil tho..

IIRC it was either Martin or the people at Mayhems who use Durelene for testing. I'm pretty sure it was Mayhems.
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