Flood Buzz® Pro: Multi-Purpose Water Leak Alarm - 2, 4 & 8 Packs

Very easy to use and test. I just put my finger across the bottom and it sounded! It makes me very confident that it will alert when water is present!

If it works, it will be a great product, and i see no reason why they shouldn't. Years ago, i had a water heater start to leak. It would be nice to catch it sooner.