Overflows compared

  • We are currently upgrading MFK. thanks! -neo
Thanks for pointing that out Willz. I was wondering about why he uses the horizontal rates for that set-up too. I think the key is stated here by Chompers:

"Gravitational Horizontal Flow: This is for horizontal applications that do not rely on a pump, or the force of a vertical pipe"

The vertical pipe in the tank allows a volume of water to fall under gravity, gaining velocity and pushing more water through. I wonder if that's right...Sounds good.:D

This would explain why shortening the PVC overflow beyond a certain point would cause it to not function properly. There would not be enough distance for the water to gain velocity...:nilly:

Karak, I guess I did miss something when reading that skicky.:)

Somebody please tell me if I'm totally :screwy:
 
I think I'm just going to have to experiment 1st hand with both models... Im partial to the second kind, but I need to see it in action before I decide on it for sure.
 
My understand is that because the "T" junction is lower in the surface skimming design, the velocity of the water is increased, as it gains energy due to gravity.
 
Yes, that sounds right. So I assume that if the two points are too close (the tee is too high), it wouldn't work properly if at all.

mcox3, report back with your findings.
 
FishFlake;4935913; said:
Yes, that sounds right. So I assume that if the two points are too close (the tee is too high), it wouldn't work properly if at all.

mcox3, report back with your findings.
Click to expand...

10-4
 
Last night I set up the overflow... I tried the second model that takes water from below the surface... And I could not get it to work... The image posted by chompers is missing something. Ill post pics of my attempt later today...
 
In chompers' diagram, the vent stack is on the drain pipe leading down to the sump, not where you have it. Don't know if that would make a difference or not.
 
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