Overflow rework plan, NEED opinion

  • We are currently upgrading MFK. thanks! -neo
do you find that your lower holes draw waste in effectively? only reason i worry is, basis of gravity is the force is downward, water pushing its self down, higher water level wants to go down, so it looks for the overflow, water in the bottom wants to go down as well.. but isn't going to want to travel upwards to get there, unless i'm insane and just over thinking this, that's why i was going to go with the pipe inside a pipe method, the water at the top has to go down in order to get out and creates a suction as it passes through the outer pipe, and back up the inner pipe, pulling all it passes by towards it.
 
streetunity said:
do you find that your lower holes draw waste in effectively? only reason i worry is, basis of gravity is the force is downward, water pushing its self down, higher water level wants to go down, so it looks for the overflow, water in the bottom wants to go down as well.. but isn't going to want to travel upwards to get there, unless i'm insane and just over thinking this, that's why i was going to go with the pipe inside a pipe method, the water at the top has to go down in order to get out and creates a suction as it passes through the outer pipe, and back up the inner pipe, pulling all it passes by towards it.
Click to expand...

Yes, the holes work. Just make sure they are big enough for debris to not clog and you have enough (or large enough) holes to flow the necessary amount of water. I'll also add a tip, water flow increases exponentially with internal pipe/hole diameter.

Don't worry about gravity, because the final water level is above the highest point of the overflow, water will literally be pushed out of the over flow regardless of the direction the intake is pointed in. Pressure increases with depth (not volume, a misconception that I see perpetuated on this forum). If the concept is still confusing, I can send you some scans of a physics book I use.

So yes, you are over thinking it. But don't worry because it is a common problem. I was a college level physics tutor (still am but I cut down on my scheduling) and that was the #1 problem.
 
If you find white PVC to be an eyesore, just use black ABS pipe.

I have not found a Material Safety Data Sheet that makes reference to it being toxic. From everything I have read, it is just as safe to use as PVC.

If you plan to cover it with some other sort of material, disregard my comment, but if you want black pipe, ABS is the way to go.
 
Longshot, do you use any sort of messenger program or anything that i can contact you on directly, i'm not saying you're wrong at all, just have a few questions, and i believe conversation form would handle it better than forum threads, (and i'm glad you pointed out depth not volume, i'm well aware of this, and the misconception bothers me constantly as well)

an engineer, and a physics tutor, well this could get interesting.
 
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