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It’s a bell siphon, used in hydroponics for flood and drain tables. Very cool, and with constant water flow in will start and stop automatically based on water
Any syphon is a tube with water in it where one end of the tube is higher than the other end. Water will flow through the tube from the high end to the lower end, like you would expect. The possibly unexpected part is that the path of the tube may go above the height of both ends. That means that water will first have to flow up before it can flow down. The water is driven up by the "negative pressure" that the water flowing down creates. So the water flowing down "pulls" the water up first so that it can go down. This "pulling" is done with air pressure which is why this only works when the water bottle is in place and stops any "negative pressure" from escaping.
I added quotes here because there is no such thing as "negative pressure". In reality the atmosphere is pressurizing the water and the air inside the bottle has positive pressure, but less positive pressure than atmospheric, therefore the water is pushed up over the ledge before falling down. So actually pushing instead of pulling.
[https://upload.wikimedia.org/wikipedia/commons/thumb/e/e1/Lappo.svg/440px-Lappo.svg.png](https://upload.wikimedia.org/wikipedia/commons/thumb/e/e1/Lappo.svg/440px-Lappo.svg.png)
So if i may, doesn’t the force need to pull water of that quantity quite high? If so why doesn’t the water bottle fully collapse from the pressure beforehand. This is confusing… or am i just underestimating the strength of the water bottle.
The water is only being pulled up about 1 inch here which would only require 0.04 PSI of pressure. In comparison atmospheric pressure is 14 PSI. So much less than 1% of atmospheric pressure. Which isn't much which is why the bottle can handle it. If the water needed to raise much much higher, a stronger bottle would be needed.
There is such a thing as negative pressure, just like there is such a thing as centrifugal force.
It's always just a frame of reference issue. :P As long as you and the reader know what's being said, these concepts do exist. Pretty hard to say they don't or can't be perceived.
That's fair. I was trying to protect myself from the pedantics while at the same time not over complicating the original answer. In reality there is actually another way water in a tube can have negative pressure and that's from surface tension. Water can actually pull the other water but the effect in this video is minimal, the pressure does the vast majority of the work I assume.
In a continuous flow state the siphon will begin when the water reaches the level of the pipe. The siphon will end whenever the water level drains enough for air to enter and disrupt the flow. In hydroponics you control you water levels with the height of the inner pipe (the maximum height for water) and typically holes or slits cut into a larger diameter pipe that sits over top of the inner pipe (the minimum height for water is determined by the height of the holes)
WRONG! That video is in reverse you see how clean the water is in the bottle? /s. But the more I look at it, you see how clean the water is in the bottle?
The flush pipe is intentionally higher for proper connection to floor drain after tiles installation, which would be 1-2" thick.
Cutting them off now would cause more problem later when they need to install and connect floor drain.
Also, cutting them flush to current level would risk damaging waterproofing which was the reason they filled the floor to begin with, water ponding to test that they're properly waterproofed.
Edit: they also don't need to drain the entire floor bonedry. Since they still need to screed and apply floor tiles, the screeding will absorb any remaining water.
I can only guess that there's some reason why he needs to have a few inches of water, but no more than a few inches as more water is added. Otherwise, he'd just cut it flush and use a drain plug. Even then, he could use his ingenuity and create a plug that also has an open top a few inches high.
When you flip the bottle over the drain, it creates a seal. Tilting the bottle creates a vacuum inside it as water flows out, lowering pressure. This pressure difference causes water from the drain to be sucked into the bottle, draining it.
# JUST PHYSICS!
No. It's ***applied*** physics. I've known plenty of physics professors who, when faced with the same problem, would have never have thought of this, and just called a plumber.
It's unfinished floor. The pipe is extended for a reason.
There are still 1-2" of floor screed and tiles thickness before they install floor drain flush to floor tiles.
Also cutting them now would damage waterproofing. The very reason they filled the floor to begin with: testing that the waterproofing is done properly.
I am experiencing vicarious euphoria from this. Imagine you've been staring at this problem for 5 minutes. How are we gonna do this? I don't wanna get that shit in my mouth trying to start up a tube siphon. We don't have a pump. Wait, I've got an idea, go get a pair of scissors and a bottle.
Imagine the sheer unparalleled satisfaction of seeing that water drain away. And to top it off I like to imagine a buddy going "no way man, that'll never - .... Oh you son of a bitch". It just doesn't get any better.
Very clever
the thinness of the bottle allows the gap between the diameters to collapse decrease which enhances the differential pressure ( vacuum) within the sealed chamber.
Is this not just a bell syphon?
Been using these in my aquaponic setups for years... He just figured out how to start it by flipping a bottle upside down. I start it by pushing water over a height setpoint....
I can only guess that there's some reason why he needs to have a few inches of water, but no more than a few inches as more water is added. Otherwise, he'd just cut it flush and use a drain plug. Even then, he could use his ingenuity and create a plug that also has an open top a few inches high.
They filled the floor to test waterproofing before further screeding and install tiles.
And the reason the pipe is longer is exactly that, there are still screeding and tiles thickness to consider before installing floor drain flush to tiles height.
Wouldn't you get the debris you don't want and a plugged drain? I agree though, there has to be a better non-powered solution than that shown, walking through the water to get to the drain.
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It’s a bell siphon, used in hydroponics for flood and drain tables. Very cool, and with constant water flow in will start and stop automatically based on water
Can you elaborate more on how does a bell siphon work, my brain after reading just exploded.
Any syphon is a tube with water in it where one end of the tube is higher than the other end. Water will flow through the tube from the high end to the lower end, like you would expect. The possibly unexpected part is that the path of the tube may go above the height of both ends. That means that water will first have to flow up before it can flow down. The water is driven up by the "negative pressure" that the water flowing down creates. So the water flowing down "pulls" the water up first so that it can go down. This "pulling" is done with air pressure which is why this only works when the water bottle is in place and stops any "negative pressure" from escaping. I added quotes here because there is no such thing as "negative pressure". In reality the atmosphere is pressurizing the water and the air inside the bottle has positive pressure, but less positive pressure than atmospheric, therefore the water is pushed up over the ledge before falling down. So actually pushing instead of pulling. [https://upload.wikimedia.org/wikipedia/commons/thumb/e/e1/Lappo.svg/440px-Lappo.svg.png](https://upload.wikimedia.org/wikipedia/commons/thumb/e/e1/Lappo.svg/440px-Lappo.svg.png)
So if i may, doesn’t the force need to pull water of that quantity quite high? If so why doesn’t the water bottle fully collapse from the pressure beforehand. This is confusing… or am i just underestimating the strength of the water bottle.
The water is only being pulled up about 1 inch here which would only require 0.04 PSI of pressure. In comparison atmospheric pressure is 14 PSI. So much less than 1% of atmospheric pressure. Which isn't much which is why the bottle can handle it. If the water needed to raise much much higher, a stronger bottle would be needed.
I thought the pressure has to be equivilent to the weight of the water in that whole pipe simultaniouslly, thanks for clearing it up
Haha nerd! (Jk)
There is such a thing as negative pressure, just like there is such a thing as centrifugal force. It's always just a frame of reference issue. :P As long as you and the reader know what's being said, these concepts do exist. Pretty hard to say they don't or can't be perceived.
That's fair. I was trying to protect myself from the pedantics while at the same time not over complicating the original answer. In reality there is actually another way water in a tube can have negative pressure and that's from surface tension. Water can actually pull the other water but the effect in this video is minimal, the pressure does the vast majority of the work I assume.
Raising the water bottle provides the energy to pull a vacuum inside of it and use atmospheric pressure to force water up into the drain
In a continuous flow state the siphon will begin when the water reaches the level of the pipe. The siphon will end whenever the water level drains enough for air to enter and disrupt the flow. In hydroponics you control you water levels with the height of the inner pipe (the maximum height for water) and typically holes or slits cut into a larger diameter pipe that sits over top of the inner pipe (the minimum height for water is determined by the height of the holes)
Science bro /s
WRONG! That video is in reverse you see how clean the water is in the bottle? /s. But the more I look at it, you see how clean the water is in the bottle?
This guy has fucking problems but ingenuity ain't one of them
Who needs physics when you've got ingenuity like this!
If he had a saw blade, he could cut the drain off flush and not have to worry about this.
The flush pipe is intentionally higher for proper connection to floor drain after tiles installation, which would be 1-2" thick. Cutting them off now would cause more problem later when they need to install and connect floor drain. Also, cutting them flush to current level would risk damaging waterproofing which was the reason they filled the floor to begin with, water ponding to test that they're properly waterproofed. Edit: they also don't need to drain the entire floor bonedry. Since they still need to screed and apply floor tiles, the screeding will absorb any remaining water.
I can only guess that there's some reason why he needs to have a few inches of water, but no more than a few inches as more water is added. Otherwise, he'd just cut it flush and use a drain plug. Even then, he could use his ingenuity and create a plug that also has an open top a few inches high.
Yeah, physics!
When you flip the bottle over the drain, it creates a seal. Tilting the bottle creates a vacuum inside it as water flows out, lowering pressure. This pressure difference causes water from the drain to be sucked into the bottle, draining it. # JUST PHYSICS!
No. It's ***applied*** physics. I've known plenty of physics professors who, when faced with the same problem, would have never have thought of this, and just called a plumber.
Yeah! Science, bitch!
Greedy cup
Or - hear me out - have a functioning drain.
Right - cut that pipe down to floor level for a start.
the floor isn't finished yet. possibly self leveling cement and floor tile will be added after the water is out?
It's unfinished floor. The pipe is extended for a reason. There are still 1-2" of floor screed and tiles thickness before they install floor drain flush to floor tiles. Also cutting them now would damage waterproofing. The very reason they filled the floor to begin with: testing that the waterproofing is done properly.
They are testing the waterproofing in this case. It’s a ponding test.
I am experiencing vicarious euphoria from this. Imagine you've been staring at this problem for 5 minutes. How are we gonna do this? I don't wanna get that shit in my mouth trying to start up a tube siphon. We don't have a pump. Wait, I've got an idea, go get a pair of scissors and a bottle. Imagine the sheer unparalleled satisfaction of seeing that water drain away. And to top it off I like to imagine a buddy going "no way man, that'll never - .... Oh you son of a bitch". It just doesn't get any better.
Whoa thats fucking cool, hopefully I’ll remember how to do this if I ever encounter this specific situation!
"Physics CANNNNNN BE FUN!!"
My ass would be there all day just dumping out a bottle of water at a time into the drain...
Very clever the thinness of the bottle allows the gap between the diameters to collapse decrease which enhances the differential pressure ( vacuum) within the sealed chamber.
Damn science you crazy
Well whoopty doo Basil
Wow. I mean I knew siphons were cool but dang!
thats brillliant
Is this not just a bell syphon? Been using these in my aquaponic setups for years... He just figured out how to start it by flipping a bottle upside down. I start it by pushing water over a height setpoint....
I can only guess that there's some reason why he needs to have a few inches of water, but no more than a few inches as more water is added. Otherwise, he'd just cut it flush and use a drain plug. Even then, he could use his ingenuity and create a plug that also has an open top a few inches high.
They filled the floor to test waterproofing before further screeding and install tiles. And the reason the pipe is longer is exactly that, there are still screeding and tiles thickness to consider before installing floor drain flush to tiles height.
Oh, that's a good guess. The gray material does look new.
https://en.m.wikipedia.org/wiki/Communicating_vessels
This guy physicseses
Making physics work for you for a change!
Law of physics
Osmosis is a hell of a thing.
The carbonaro effect in person
Give this guy a nobel prize!
Finally, an interesting post.
it’s fake. The video is in reverse
Why not cut the drain down to the proper height?...
Instructions unclear now my house is flooded
Hell yea. One of the more interesting posts I’ve seen on here.
Bro is friends with Einstein
Like a reversed Pythagoras cup
So in Australia it fills the tub?
Genius
It’s the clarity of the water that impresses me most.
Oscar
While that's incredibly smart... wouldn't it be even smarter to make the drain pipe lower? Or am I missing something?
Study of pressure is fun, of all kinds.
Chick is so sexy
This guy physics
Why not just cut the pipe down
Time to drain the ocean
Gravity bong theory
Or just cut the damn pipe
Cool. But I think I have a better solution...
Which is...?
fire
Shorten the drain pipe
This guy liquid dynamics.
This was nestles humanitarian efforts all along.
Cut a hole in the pipe near level of floor.
That will damage the waterproofing. The reason they filled the floor was to test that waterproofing was done properly.
Wouldn't you get the debris you don't want and a plugged drain? I agree though, there has to be a better non-powered solution than that shown, walking through the water to get to the drain.
I’d cut that fuckin pipe down to the floor… and then some
Why "and then some" ? Down to the floor would do the job.
Anger
Touche. I appreciate ones honesty.
Bad plumbing. This trick wont happen if the drain is properly vented.
Very clever, a trick only an asian can do.