Water Leak Detector Alarm (3-Pack)

Each sensor in this three-pack sits on the floor near a water heater, washing machine, or under a sink, and sounds a loud audible alarm the moment its contact probes detect standing water. It's a simple, purely local device — no app, no Wi-Fi setup — just battery power and a sensor that triggers on contact with moisture.

The alarm volume is loud enough to be heard from another room, which matters because most leak damage from a slow drip happens exactly because nobody is present to notice it early. Placing one under a water heater, one under a washing machine, and one under a kitchen sink covers the three most common sources of a slow undetected leak in a home.

Each unit runs on a single replaceable battery and includes a low-battery warning chirp, similar to a smoke detector, so it signals when it needs a new battery well before it would go silent from a dead battery.