Surprisingly easy and cheap! This thing is great I've purchased a $13 universal power supply and connected it to this then I hooked it up to an appliance module smart switch on my home automation and viola! When we are sleeping or out of the house this turns off the water supply just in case it leaks when we are not awake or gone.
Only downfall that I can see is that it draws about 6 watts to keep it on other than that it's great.
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