Water Leak Prevention and Detection - (Without Wifi)

[Steve W.]

Hi everyone!  First I'd like to say thank you for the guidance and inspiration on this forum.  I've been reading the posts for about two years and my wife and I finally took the plunge to buy my first property!  

We purchased a triplex built in 1950 and we're in the process of renovating one of the units.  I was informed that the downstairs unit was flooded about 3 years ago from a water leak and there have been a few other minor water-related issues as well.  Currently, I'm working with a plumber to upgrade old appliances, valves, and water heaters as preventative maintenance to avoid flooding issues in the future.  Maybe I'm overly concerned, but I've been considering ways I can add water detection and automatic shut-off valves to the building.  I've looked into many systems; however, they seem to all require wifi connection to work, which isn't possible since tenants provide their own internet.  

Does anyone have recommendations to avoid flooding from water leaks?  Are there good systems that can easily be used by tenants without requiring internet setup?  Should I not worry about this and just make sure sure my insurance coverage is adequate?  

This concern has been on my mind since purchasing the building so any help is greatly appreciated! Thank you!