Reliable water main shutoff?

[RBoy (www.rboyapps.com - Making SmartThings Easy!)]

May be worth reading this topic, you can get top mounted valves which are pretty reliable:

What's the consensus on water valves?

Dome, ZooZ, EcoNET - they all use the EXACT same motor and chipset for controlling the actual water valve. The difference lies in the mounting hardware. IMHO EcoNET has the BEST mounting hardware for it, it’s the most stable and doesn’t twist under pressure. And yes when you have an old ball joint or a larger than one inch pipe that mounting hardware makes all the difference when it matters when the pedal hits the metal (no pun intended). If it twists, the game is over. If it shudders it won’t close completely and you’ve still got a leak. Here are a few experiences