MODERN DAY TECH
There are many Flood & Leak Sensors in HomeKit. Unfortunately, though, there are no HomeKit Water Shut-off valves in the HomeKit ecosystem. Today, I set up the EcoNet Water Shutoff Valve in my HomeKit home. Also known as The Bulldog Valve Robot - https://geni.us/EcoNet (affiliate link)
PROs: high torque, fits ball valve up to 1.5", easy to install without a plumber,
installs on the ball valve instead of the pipe, good customer support,
CONs: not native to HomeKit (but still works well), more expensive than lower torque brands,
You'll need all three of these to expose the shutoff valve to HomeKit.
By Eric - ModernDayTech