This three-pack of water leak detectors is perfect for placing near sinks, toilets, or water heaters — anywhere leaks might sneak up on you. The setup is quick and easy — simply place it and forget about it until it lets out a loud alarm at the first sign of moisture. At 95 decibels, which is the equivalent of a lawn mower, the sound is loud enough to catch your attention. That said, if you need it louder, you can double two of them up in the same space.