The researchWhy you should trust usWho this is forHow we picked and testedOur pick: D-Link DCH-S1621KT Whole Home Smart Wi-Fi Water Leak Sensor KitRunner-up: YoLink Water Leak Sensor 4Budget pick: Kidde Water Leak + Freeze DetectorOther good water-leak detectorsWhat to look forward toThe competitionWhy you should trust usEric Chiu is a service journalist who covers subjects including internet providers, smart-home tech, and home appliances. He has also reviewed smart sensors for Wirecutter, and his work has appeared in outlets such as CableTV.com, Top Ten Reviews, and The Awl.Who this is forIf you have ever discovered surprise cabinet damage underneath a dripping sink or have a utility room full of flood-prone sump pumps, appliances, and drains, you may want to invest in one or several smart leak detectors. These devices keep an eye on the places you can’t check daily and help you catch small drips before they become catastrophic water damage.Water-leak detectors are typically battery-...