Water powered timers hidden in public restrooms

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:    • The AUTO SYPHON cut open - how it works   My syphon based binary adder video is here:    • I Made A Water Computer And It Actually Works   You can buy my books here: https://stevemould.com/books You can support me on Patreon and get access to the exclusive Discord:   / 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:   / moulds   Instagram:   / stevemouldscience   Facebook:   / stevemouldscience   Buy nerdy maths things: http://mathsgear.co.uk