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Water powered timers hidden in public restrooms
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1,390,985 Views • Jul 31, 2024 • Click to toggle off description
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This is a very clever type of automatic syphon that you find in urinal cisterns.

‪@mrmattandmrchay‬'s video is here:    • The AUTO SYPHON cut open - how it works  
My syphon based binary adder video is here:    • I Made A Water Computer And It Actual...  

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Views : 1,390,985
Genre: Science & Technology
Uploaded At Jul 31, 2024 ^^


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RYD date created : 2024-09-18T07:28:34.219993Z
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YouTube Comments - 1,634 Comments

Top Comments of this video!! :3

@SteveMould

1 month ago

I was going to return to that toilet in Beckenham with a ladder and a high vis jacket so I could show you the syphon inside the cistern, but I chickened out. So you'll have to do it yourself. Bonus points if you can find that exact public toilet.
The sponsor is Henson Shaving: click this link www.hensonshaving.com/stevemould and use the
code stevemould to receive 100 free blades with the purchase of your AL13 razor.

939 |

@darrennew8211

1 month ago

As a computer programmer, I always love seeing these complex mechanical designs that do complex stages of things using nothing but simple physics. The thought process it takes to create something like this fascinates me.

1.3K |

@aikumaDK

1 month ago

Every video since the gas station pump thing has only increased my respect for the people who can work out these systems that are simultaneously simple and complex.

394 |

@matthewwhite546

1 month ago

“Whatcha watching, honey?”
“A video about urinals.”

2.3K |

@Entertainment-us6gt

1 month ago

Here’s a tip for understanding the different layers of chambers: Instead of using a white background with blue water, try using a yellow background. This way, as the blue water fills up the chamber, you’ll see green water, making it easier to visualize the layers how the water is filling it up.

106 |

@JustWasted3HoursHere

1 month ago

I like the fact that no physical valves, springs, flappers etc are needed for it to work. Therefore, in theory, it should last for a very long time with little to no maintenance.

1.6K |

@Eminthepooh

1 month ago

Reminds me of a transistor driving another transistor called a Darlington Pair. This allows a really small/weak signal to drive a big load. Well done Steve!

105 |

@bob_._.

1 month ago

I can't say it's a strictly British thing but I don't recall ever seeing the urinal flush thing in my 70 years in America.

2.4K |

@icojb25

1 month ago

"You may know this already, but I am already a huge fan of automatic siphons ... " hahaha, what a great way to open a video.

28 |

@korg47237

1 month ago

In the US, every urinal does in fact have its own flushing mechanism. Never even knew the "communal" flush design was a thing!

2.2K |

@theoriginaledi

1 month ago

The blue fingers elevate the video. Gives a whole new meaning to "getting your hands dirty" with hard work. :D

80 |

@alfadog67

1 month ago

I grew up in the UK, in greenham common. From there I could see a manor house. We visited the Manor House a couple of times, and one time my mom and sister walked into the bathroom and reported that the toilets were flushing automatically all at once. I didn't know what that meant, and I suspected that there was some mechanism besides the roaming ghost that my mother had reported, and now 50 years later, you've given me the answer. Thank you Steve

284 |

@Knight8365

1 month ago

Thanks so much for this video. There's a whole community of gardeners using plain bell siphons in aquaponics who have trouble getting the siphon to trigger. Your clear explanation and visual of the system will help design better siphons and reduce these problems. Great stuff, thanks again!

14 |

@TristanJCumpole

1 month ago

If you pour too much wine into Socrates' cup, it automatically dispenses urine into his fabric conditioner rinse cycle, ruining his togas. Full success!

521 |

@joefrayling9263

1 month ago

The combination of chill vibes elevator music and 80s adult entertainment soundtrack to the imagery of a urinal flushing mechanism at different speeds is absolutely on point Mr mould 👍

6 |

@mynewhobby6323

1 month ago

The state of that toilet at 1:30 XD still better than the one in Greenwich near the main park gate

186 |

@tiagoferreira086

1 month ago

Whoever came with that invention was really clever, a valve and a timer with no moving parts, "very impressive".
As a side note i appreciate the mrmattandmrchay channel for old elevators videos, they are fascinating in their own way.

30 |

@logiclrd

1 month ago

Technically, you should have kept pouring once the siphon initiated, to show that it works even if water keeps trickling into the reservoir (as it does in an actual installation).

148 |

@xzorby

1 month ago

I worked on autosiphons for ebb&flow beds in hydroponics/aquaponics. They're really fun and once you get them dialled in they are very low maintenance, because there are no moving parts. But indeed matching the sizing to the required outflow and minimum inflow can be a pain. Very interesting to see how they solved that with this multi stage siphon setup!

14 |

@HunterJE

1 month ago

I feel like this two-layer tech really opens up the space of (mostly-)2D models of fluid-dynamic mechanisms, excited to see where we go next!

35 |

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