"Automated piping saves power and time by removing the need for Duplicant input."
The Liquid Shutoff is a structure that works with the Automation system in Oxygen Not Included. It combines with sensors and gates to determine when to turn the Liquid flow on and off.
Liquid Shutoff is in the third tier of Research under Improved Plumbing. Duplicants will need to learn Plumbing and Filtration before they can unlock it.