I’m currently working with fellows at z-wave js to get my ADC SWM-150 working in HA.
It unsupported at the moment BUT, including it into my Z-wave system in HA with Z-wave js, it does have some basic functionality out of the box, like showing sensors and turn the valve on/off.
For example, here’s my flow rate over the last couple of days, and you can see consumption usage. You can see I started water my grass at around 4 pm.
At the moment, it does not allow me set thresholds for temperature and flow rate to sound the local buzzer), but I can set automations based on the flow rate (and temperature based on the sensors) for certain times to let me know if there is an active leak (without leak detectors).
I’m not sure what is involved in getting a device added to the z-wave js repository, but they seem really keen in figuring it out also.