Thanks for the responses.
** Update ** Installed new Bradford White, 75 gal tank - natural gas. Basically same thing as before, just what ever the latest gen of model is. See pics of install. As for alarms, I have a different, automated approach. I have a solution using the follwoing:
A mechanical home main water value on/off motor to actually turn the main water valve on or off (Bulldog Robot). I like this design as I do not have to put an active smart device in line to the plumbing.
https://www.econetshop.com/bulldog.html
For sensors, I have sensors from YoLink (
https://shop.yosmart.com/pages/yolink-smart-water-solutions. I have multiple Pucks and a Rope puck in my WH pan). I not only have sensors at the WH, but also in other areas of my home, e.g. washer/dryer floor, bathroom sinks/toilets, and even at top of my kitchen refrigerator/freezer as I have conditioned water feeding ice maker/water dispensing. I have had water failures at the washing machine area (discharge line got loose, popped out and spewed water all over - I was home. Top of a 1995 Sub Zero water inlet for ice/water dispense - failed, water over the kitchen floor -- I was home, but happened over night. One toilet valve failed when I was away for 1/2 day - water over floor -- slow leak (thankfully). WH (2 of them) failed, water came over pan and could not drain to garage floor fast enough.
So, I have the Bulldog Robot mechanically mounted on the water main valve in my garage -- mounted like the picture from the URL. I have multiple sensors through out the house. If the "puck" senses water, bulldog valve physically closes vale.