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Custom Liquid Coolant Seems to Evaporate in the Loop

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freelowdr

New Member
Joined
Dec 23, 2024
Hi All, the coolant in my loop seems to be evaporating at an alarming rate of around 2 bottlecaps worth per month whether I have it on or not. There is no sign of any leak anywhere. This is also my second build and other than evaporation I have no issues to speak of.
I have a custom cooling loop that I use for aesthetic purposes mostly but it does an excellent job of cooling my CPU also. I have Thermaltake T1000 Acid Green Transparent Coolant and it looks fantastic. Don't get me wrong it is soft tubing and about as simple as a loop can be, but I do have a flow indicator.
I actually salvaged the radiator and reservoir from a 12 year old computer which might have been a mistake. I also used some of the original tubing. I think some of the tubing I have might be vinyl some is polyethylene. I'm not sure anymore
Has anyone encountered anything like this? Does it seem like I might definitely have a leak or I'm missing something. I ask because I might be willing to change the radiator and perhaps the tubing, but the reservoir shows no sign of issues nor does the pump
I don't want to spend money to replace parts only to find out that there is some other phenomena that I need to be aware of from other more experienced users.
Please assist me in assessing the situation. I would hate to just get a standard air cooler but it's looking like I may have to bite the bullet on this one.
Thanks in advance. Happy Holidays

Thermaltake T1000 Acid Green Transparent Coolant
CPU: i7 7700
RAM: 16GB
GPU: GTX 970
 
When did you last fill the loop? Are you certain you were able to bleed every little bit of air out of your loop? If yes, see below. If no, it's likely just residual air trapped in your rad slowly seeping out. It can take months to completely free some pockets depending on how your loop is configured.

If yes- Get your highest quality flashlight out and check the undersides of every one of your fittings (pay special attention to rotaries)for white crusty stuff (dried up coolant). Then very carefully check both sides of your rad and dbl check under your pump for the same. If you don't see anything you're gtg. If you do...slow leaks are generally easy to fix.
GL!
 
I really appreciate the info from everyone. I think I'll go ahead and accept this as a combination of air in the loop and a natural loss. It's just that the Thermaltake T1000 coolant is $20 a bottle. Call me stingy but topping it off every month seems like kind of frequent, but I guess I was wrong to think that. I'll consider this the cost of doing business, as it were. We can consider this problem resolved.
 
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