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Where to place reservoir/pump combo?

post #1 of 9
Thread Starter 
I saw this rig in another thread. When the rig shuts down, does water not flow into the reservoir due to gravity? You could have a potential problem where water overflows the reservoir, no?



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post #2 of 9
I am not sure if this is serious, but the short answer is no.
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post #3 of 9
Thread Starter 
Yes, it's serious. Here's another picture. The blue line is the water line. Shouldn't the water in the tube enter the reservoir to try and keep an even water line once the system is turned off?


Edited by homestyle - 5/20/11 at 9:42am
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post #4 of 9
In the picture you drew, yes, the water would drop down when the pump was turned off.

However in most WC setups the inlet and outlet in the res are submerged. Thus it can't suck air up the tube to displace the water.

If your res inlet wasn't submerged then yes, water may well run back down into the res if air is able to work its way back up the tubing.
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post #5 of 9
It's a sealed system, where's the water gonna go?
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post #6 of 9
dude, seriously, think before you post.
    
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post #7 of 9
It's a pressure thing. If the water were to drain into the reservoir it would leave an empty void in the tube. This void would be a vacuum (no air). Since this vacuum would essentially have no pressure, the water is sucked back towards the vacuum (higher pressure moves toward low pressure).

This is actually an incorrect answer, but an easy way to visualize it (correct answer is that the pressure is equal so it doesn't move at all).

FYI I thought it was an interesting question.
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post #8 of 9
Quote:
Originally Posted by gotcha_90 View Post
FYI I thought it was an interesting question.
This.

Guys, it is a valid question. If you can't answer it nicely then move along.
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post #9 of 9
One day, if you guys have questions that may needs answer (maybe its not about computer). Be courteous man.
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