If you want to do this yourself 1) install HAOS, running it any other way is a step towards madness 2) get a decent zigbee controller 3) https://sonoff.tech/

If you want to do this yourself 1) install HAOS, running it any other way is a step towards madness 2) get a decent zigbee controller 3) https://sonoff.tech/en-uk/products/sonoff-zigbee-smart-water-valve https://sonoff.tech/en-uk/products/sonoff-zigbee-smart-water... Job done, the rest is all up to taste using either sensors or public data to infer water state.