this water monitor already saved me a lot of trouble. Put them all over my house wherever we have a sink or water. We have a double vanity in our master bathroom and one of the drains started leaking very slowly. Alarm sounded with just a very small puddle inside the vanity. This could have went unnoticed until it damaged the vanity or until the leak got worse. An ounce of prevention is worth a pound of cure monitors are also reusable, just remove it from water, fix the leak, and put it back to do it's job again.