Check out MyGuard Automatic Laundry Water Shut-Off system as well. It is a little bit low tech but for automatic shutoff system you might not necessarily need the remote controls option.
I also quite like this article on shut off valves https://smarthome.university/bests-shut-off-valve/
The one I bought wasn’t able to close the handle all the way because of lack of sliding in the shut of lever. The gearbox and motor is very strong so it only need some simple modifications to work.
This one is an alternative, but don’t seem to be z-wave:
https://www.amazon.com/Dome-Automation-Water-Shut-Off-Valve/dp/B01LX3JFR8/ref=as_at?creativeASIN=B01LX3JFR8&imprToken=LlLuwazwZMnANOk83iwGzA&slotNum=3&s=aps&ie=UTF8&qid=1528043993&sr=1-2-catcorr&keywords=shut+off+valve+zwave&linkCode=w61&tag=khalilkk-20&linkId=a854741965a588851f6f33634489df84