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Old September 13, 2010, 07:52 PM
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dustin1706 dustin1706 is offline
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Join Date: May 2010
Location: Alberta
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My System Specs

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You are basically correct kkkwj. All reservoirs need to have their output below the water level (obviously), and it's always best to have your res input below the water level also, instead of at the top of the reservoir to prevent agitation that can cause air bubbles. So as long as you don't let your fluid level drop below the output port you can't get any air in the system.

The reason all of the water doesn't just run out of the top mount rad is because both ports of the rad eventually go to the reservoir. This means that the hydrostatic pressure is equal on both rad ports, thus eliminating the problem.

The only other way for air to get into your system is by having a small leak in a low pressure high velocity part of the loop (unlikely) or a small hole near the top of the loop which will draw air while the system is off.
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