How automatic siphons in trough urinals work

Click this link https://www.hensonshaving.com/stevemould and use the code stevemould to receive 100 free blades with the purchase of your AL13 razor. This is a very clever type of automatic syphon that you find in urinal cisterns. @mrmattandmrchay's video is here: https://www.youtube.com/watch?v=3So7W34KNV8 My syphon based binary adder video is here: https://www.youtube.com/watch?v=IxXaizglscw You can buy my books here: https://stevemould.com/books You can support me on Patreon and get access to the exclusive Discord: https://www.patreon.com/stevemould just like these amazing people: Ubiquity Ventures Pavel Dubov Jeremy Cole Jacob Chow Jacob Elterich Tj Steyn Brendan Williams Frank Hereford Alex Hackman Glenn Sugden Lizzy and Jack Lukas Biewald Damien Szerszinski Marshall Fitzpatrick Heather Liu Grant Hay Paul Warelis Nathan Blubaugh Twitter: http://twitter.com/moulds Instagram: https://www.instagram.com/stevemouldscience/ Facebook: https://www.facebook.com/stevemouldscience/ Buy nerdy maths things: http://mathsgear.co.uk