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I attached some photos of my recently filled and leak tested rig. I am concerned that my res may be filled too much, is this a concern? Is fluid expansion a real issue, or is it too small to be relevant in a pc?<br><br>
Thanks<a class="H-lightbox-open" href="http://www.overclock.net/content/type/61/id/2989026/"><img alt="" class="lightbox-enabled" data-id="2989026" data-type="61" src="http://www.overclock.net/content/type/61/id/2989026/width/200/height/400/flags/LL" style="; width: 200px; height: 113px"></a><a class="H-lightbox-open" href="http://www.overclock.net/content/type/61/id/2989027/"><img alt="" class="lightbox-enabled" data-id="2989027" data-type="61" src="http://www.overclock.net/content/type/61/id/2989027/width/200/height/400/flags/LL" style="; width: 200px; height: 113px"></a><br><a class="H-lightbox-open" href="http://www.overclock.net/content/type/61/id/2989028/"><img alt="" class="lightbox-enabled" data-id="2989028" data-type="61" src="http://www.overclock.net/content/type/61/id/2989028/width/200/height/400/flags/LL" style="; width: 200px; height: 113px"></a>
 

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General consensus from around the "internet" when I was searching for that very answer – after bleeding, fill it to the brim, the expansion is not an issue.
 

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<div class="quote-container" data-huddler-embed="/t/1625993/how-much-to-fill-reservoir#post_25939696" data-huddler-embed-placeholder="false"><span>Quote:</span>
<div class="quote-block">Originally Posted by <strong>Tomahok2</strong> <a href="/t/1625993/how-much-to-fill-reservoir#post_25939696"><img alt="View Post" class="inlineimg" src="/img/forum/go_quote.gif"></a><br><br>
I attached some photos of my recently filled and leak tested rig. I am concerned that my res may be filled too much, is this a concern? Is fluid expansion a real issue, or is it too small to be relevant in a pc?<br><br>
Thanks<a class="H-lightbox-open" href="http://www.overclock.net/content/type/61/id/2989026/"><img alt="" class="lightbox-enabled" data-id="2989026" data-type="61" src="http://www.overclock.net/content/type/61/id/2989026/width/200/height/400/flags/LL" style="; width: 200px; height: 113px"></a><a class="H-lightbox-open" href="http://www.overclock.net/content/type/61/id/2989027/"><img alt="" class="lightbox-enabled" data-id="2989027" data-type="61" src="http://www.overclock.net/content/type/61/id/2989027/width/200/height/400/flags/LL" style="; width: 200px; height: 113px"></a><br><a class="H-lightbox-open" href="http://www.overclock.net/content/type/61/id/2989028/"><img alt="" class="lightbox-enabled" data-id="2989028" data-type="61" src="http://www.overclock.net/content/type/61/id/2989028/width/200/height/400/flags/LL" style="; width: 200px; height: 113px"></a></div>
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Not that you should be getting any where near hot enough. But air left in the reservoir will expand and put additional pressure in your system when it is heated. The less air the better. We are talking minimal amount of psi added though.
 

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Thanks guys. One last question, there is one bubble in my cpu block I just cannot seem to bleed out. Have any tips? Also, how big of a deal is it to get it out?<br><br>
I attached a picture of the block with the pump on. <a class="H-lightbox-open" href="http://www.overclock.net/content/type/61/id/2989264/"><img alt="" class="lightbox-enabled" data-id="2989264" data-type="61" src="http://www.overclock.net/content/type/61/id/2989264/width/200/height/400/flags/LL" style="; width: 200px; height: 113px"></a>
 

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<div class="quote-container" data-huddler-embed="/t/1625993/how-much-to-fill-reservoir#post_25940381" data-huddler-embed-placeholder="false"><span>Quote:</span>
<div class="quote-block">Originally Posted by <strong>Tomahok2</strong> <a href="/t/1625993/how-much-to-fill-reservoir#post_25940381"><img alt="View Post" class="inlineimg" src="/img/forum/go_quote.gif"></a><br><br>
Thanks guys. One last question, there is one bubble in my cpu block I just cannot seem to bleed out. Have any tips? Also, how big of a deal is it to get it out?<br><br>
I attached a picture of the block with the pump on. <a class="H-lightbox-open" href="http://www.overclock.net/content/type/61/id/2989264/"><img alt="" class="lightbox-enabled" data-id="2989264" data-type="61" src="http://www.overclock.net/content/type/61/id/2989264/width/200/height/400/flags/LL" style="; width: 200px; height: 113px"></a></div>
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What are you running your pump at? 100%? Also I would rotate the case around on its side the air would want to travel up.
 

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Small bubbles like that dissolve with time on their own. Give it few days.
 

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With flexible tubing over time some of the water will permeate the tubing and evaporate. So you will have to top up from time to time. Different tubing has different rates of permeation. It is a slow process, so you may have to top it off after 6 months or so. This is why I like to fill my system to the top. Then after a week of running it, top it off after the bleeding process is done. Then I know that I am good for a long time.
 

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Staying on topic, but with my own question...I quite like the idea of my side inlet being above or right at the water line in my reservoir...I find the water movement visually appealing. Aside from bubbles being introduced by splashing which can be mitigated by a baffle, is there any compelling reason not to have a splashy reservoir?
 

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<div class="quote-container" data-huddler-embed="/t/1625993/how-much-to-fill-reservoir#post_25939696" data-huddler-embed-placeholder="false"><span>Quote:</span>
<div class="quote-block">Originally Posted by <strong>Tomahok2</strong> <a href="/t/1625993/how-much-to-fill-reservoir#post_25939696"><img alt="View Post" class="inlineimg" src="/img/forum/go_quote.gif"></a><br><br><a class="H-lightbox-open" href="http://www.overclock.net/content/type/61/id/2989027/"><img alt="" class="lightbox-enabled" data-id="2989027" data-type="61" src="http://www.overclock.net/content/type/61/id/2989027/width/200/height/400/flags/LL" style="; width: 200px; height: 113px"></a></div>
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You've actually got a decent-sized bubble in there as it is, so there's nothing to worry about. But as others have mentioned, the expansion of water at the range of temperatures and volumes used in PC watercooling is rather small--if you have say 1 quart of water that ranges 10 degrees celsius, the expansion/contraction will be less than 1/2 a teaspoon. I'm not an engineer or a physicist, but I'd guess that turning your pump on and off probably puts a lot more stress on the system, and it's well within the strength of the cooling components to handle.<br><br>
Silly question, but that's the res inlet on the top, and outlet on the bottom, right?
 

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Thanks for the comment, makes me feel a lot better (As others have said the same). I kept my inlet and outlet on the default positions. The fill port is on the top (Left) and then the loop runs through the right (Bottom) side. The inlet is the upper fitting and the outlet to the pump is the lower fitting.
 

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BTW, I have tried rotating the case to get rid of the bubble, but I will just give it time and see what happens as thermals are quite good. I have been gone from home for the last few days, so my pc has been off, I will turn it back on and see what happens when I get back.
 

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In general you try to keep as little air in the loop as possible, any air encourages corrosion and growth, but a little bit of bubbles in a reservoir is perfectly fine provided it stays there. Over time the bubbles will 'grow' due to the water evaporating, if this becomes an issue you can simply add an air trap (commonly the top-up line/hose) and top it up every now and then.<br><br>
Generally this is why reservoirs are usually mounted vertically as it simplifies air management.
 

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I'm not a fan of full to the brim reservoirs. I like a high level but an easily visible coolant level.<br>
A human eye should be able to spot any leak, fast or slow, quicker than any machinery.
 

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Dan

It can be worthing thinking of the ervior as a cup of teas, the larger the amount of liquid, the longer it takes to disipate the heat. With that said, I am going for a full reservior to start with this time. If I find it difficult to cool at higher temperatures then removing some liquid is one option to fix it.
 

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It can be worthing thinking of the ervior as a cup of teas, the larger the amount of liquid, the longer it takes to disipate the heat. With that said, I am going for a full reservior to start with this time. If I find it difficult to cool at higher temperatures then removing some liquid is one option to fix it.
The amount of liquid doesn't affect the cooling capacity, it affects the thermal inertia: How fast it cools or warms up. The maximum temps aren't affected by the quantity of liquid, just how fast it gets there.
 
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