Price unavailable right now
Updated November 2026
Data from the official Kidde and YoLink sites.
2026 verdict
The YoLink Water Leak Sensor 4 is the better-reviewed, tougher sensor here, and its local siren keeps working when the network is gone.
It is IP66 rated, backed by a two-year warranty, runs about five years on two AAA cells, and fires a 105 dB alarm with an alert light from the unit itself. The Kidde WiFi Water Leak & Freeze Detector counters on price and integration: it joins Wi-Fi with no hub, works with Google Home and Home Assistant, and matches the YoLink on freeze warnings. Choose the YoLink Water Leak Sensor 4 for long-range cover across a large property, and the Kidde WiFi Water Leak & Freeze Detector for a cheaper hub-free sensor with Google Home support.
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Connectivity
- Wi-Fi 2.4 GHz
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| Feature | Kidde WiFi Water Leak & Freeze Detector | YoLink Water Leak Sensor 4 | Winner |
|---|---|---|---|
| Rating | 3.9 | 4.8 | YoLink Water Leak Sensor 4 |
| Warranty | 1 year | 2 years | YoLink Water Leak Sensor 4 |
| Weather Resistance | NO | IP66 | YoLink Water Leak Sensor 4 |
| Integrations | Google Home, Home Assistant | Home Assistant | Kidde WiFi Water Leak & Freeze Detector |
| Connectivity | 2.4 GHz WiFi | Other | Tie |
| Sensors | Water Leak, Temperature | Water Leak, Temperature | Tie |
| Alerts | Water Leak Alerts, Temperature Alerts, Freeze Temperature Alerts, Low Battery Alerts | Water Leak Alerts, Temperature Alerts, Freeze Temperature Alerts, Low Battery Alerts | Tie |
| On Device Alert Sound | YES | YES | Tie |
What the differences mean
Alarm
The YoLink Water Leak Sensor 4 has a 105 dB on-device siren and an alert light that fire locally, even if the hub is offline. The Kidde WiFi Water Leak & Freeze Detector has a local sound but no published alert light.
Range and hub
The YoLink Water Leak Sensor 4 uses LoRa and needs a YoLink hub, which gives it long reach to outbuildings and far corners. The Kidde WiFi Water Leak & Freeze Detector joins 2.4 GHz Wi-Fi directly and needs no hub, but depends on a usable signal.
Battery and warranty
The YoLink Water Leak Sensor 4 is rated about five years on two AAA cells and carries a two-year warranty. The Kidde WiFi Water Leak & Freeze Detector has no published battery-life figure on its sheet and a one-year warranty.
Integration
The Kidde WiFi Water Leak & Freeze Detector works with Google Home and Home Assistant. The YoLink Water Leak Sensor 4 supports Home Assistant too, but not Google Home, relying on IFTTT and the YoLink app otherwise.
Housing
The YoLink Water Leak Sensor 4 is IP66 rated for damp placements. The Kidde WiFi Water Leak & Freeze Detector has no weather-resistance rating, so it is best kept dry.
Which one to buy if
- the sensor is far from the router or in an outbuilding
The YoLink Water Leak Sensor 4 uses long-range LoRa through its hub, reaching places Wi-Fi cannot.
- you want a loud local alarm that works offline
The YoLink Water Leak Sensor 4 fires a 105 dB siren with a light at the sensor itself, independent of the hub.
- you want no hub at all and Google Home support
The Kidde WiFi Water Leak & Freeze Detector joins Wi-Fi directly and works with Google Home.
- you want the longest battery and warranty cover
The YoLink Water Leak Sensor 4 is rated about five years on a set of batteries and carries a two-year warranty.
- you want the lower-priced option
The Kidde WiFi Water Leak & Freeze Detector is the cheaper sensor of the two.
Price unavailable right now
- + Integrations: Google Home, Home Assistant
- - Rating: 3.9 vs 4.8
- - Warranty: 1 year vs 2 years
Winner
27% OFF
$17.59
$23.99
- + Rating: 4.8
- + Warranty: 2 years
- + Weather Resistance: IP66
- - Integrations: Home Assistant vs Google Home, Home Assistant
What owners say
Owners of both sing the praises of a save: Kidde WiFi Water Leak & Freeze Detector owners tell of a basement alert arriving while hundreds of miles from home, and YoLink Water Leak Sensor 4 owners of catching a failing water heater or a burst washing machine hose. The differences show up in the details. Kidde WiFi Water Leak & Freeze Detector owners complain about Wi-Fi pairing, a hard-to-open battery hatch and a temperature reading that updates twice a day. YoLink Water Leak Sensor 4 owners love the range, the multi-year battery and the siren that fires even if the hub is offline, and only fault the app for being confusing to set up at first.
Frequently Asked Questions
Which is better overall: Kidde WiFi Water Leak & Freeze Detector or YoLink Water Leak Sensor 4?
The YoLink Water Leak Sensor 4 edges ahead on build and battery: it is IP66 rated, has a two-year warranty, about five years of battery life and a 105 dB siren that works offline. The Kidde WiFi Water Leak & Freeze Detector is cheaper and needs no hub, with Google Home support.
Does the YoLink Water Leak Sensor 4 need a hub?
Yes. It connects over YoLink's proprietary LoRa radio and needs a YoLink hub. The Kidde WiFi Water Leak & Freeze Detector joins 2.4 GHz Wi-Fi directly with no hub.
Will these sensors still alert if the network goes down?
The YoLink Water Leak Sensor 4 will, because its 105 dB siren and alert light trigger locally at the unit. The Kidde WiFi Water Leak & Freeze Detector has a local sound too, but its connectivity depends on Wi-Fi.
Which one has a longer battery and warranty?
The YoLink Water Leak Sensor 4 is rated about five years on two AAA batteries and carries a two-year warranty. The Kidde WiFi Water Leak & Freeze Detector's battery life is not published on its sheet and its warranty is one year.
Do these work with Google Home or Home Assistant?
The Kidde WiFi Water Leak & Freeze Detector works with Google Home and Home Assistant. The YoLink Water Leak Sensor 4 supports Home Assistant and IFTTT, but not Google Home.
Who should buy the YoLink Water Leak Sensor 4?
Owners of large properties who need long-range coverage, a siren that works without the network and long battery life, and who already run or will add a YoLink hub.
Who should buy the Kidde WiFi Water Leak & Freeze Detector?
Buyers who want a cheaper, hub-free sensor that warns of both leaks and freezing and works with Google Home, and who will plan for the Wi-Fi pairing step.
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