Looking for an Automatic Emergency Water Shutoff - Does it exist?

[Mindy Jensen]

Our MHP is located in Maine. Water is submetered, but a tenant in the throes of eviction had a pipe burst, didn't do anything about it and now I'm on the hook for a hefty water bill.

Since we're in Maine, freezing pipes is a big concern. Does anyone know of any auto water shutoff valve or similar way to monitor for freezing pipes?  (It's a BIG water bill.)

Thanks!