Winner
Updated November 2026
Data from the official Fibaro and Kidde sites.
2026 verdict
For a Z-Wave household, the Fibaro Flood Sensor (Z-Wave) is the more capable detector than the Kidde WiFi Water Leak & Freeze Detector.
It pairs with a Z-Wave controller to add water, temperature and tilt sensing, tamper alerts and an on-device sound and light, and it runs about two years on a CR123A cell with optional wired power. The Kidde WiFi Water Leak & Freeze Detector wins on price and needs no hub, joining Wi-Fi directly with Google Home and Home Assistant and adding freeze and low-battery alerts. Pick the Fibaro if you already run SmartThings or Home Assistant over Z-Wave, and the Kidde for a hub-free install.
Works with
Connectivity
vs
Price unavailable right now
Works with
Connectivity
- Wi-Fi 2.4 GHz
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| Feature | Fibaro Flood Sensor (Z-Wave) | Kidde WiFi Water Leak & Freeze Detector | Winner |
|---|---|---|---|
| Rating | 4.3 | 3.9 | Fibaro Flood Sensor (Z-Wave) |
| Sensors | Water Leak, Temperature, Tilt | Water Leak, Temperature | Fibaro Flood Sensor (Z-Wave) |
| Alerts | Water Leak Alerts, Temperature Alerts, Freeze Temperature Alerts, Tamper Alerts | Water Leak Alerts, Temperature Alerts, Freeze Temperature Alerts, Low Battery Alerts | Fibaro Flood Sensor (Z-Wave) |
| Warranty | 1 year | 1 year | Tie |
| Connectivity | Z-Wave | 2.4 GHz WiFi | Tie |
| Integrations | Samsung SmartThings, Home Assistant | Google Home, Home Assistant | Tie |
| On Device Alert Sound | YES | YES | Tie |
What the differences mean
Hub or no hub
The Fibaro Flood Sensor (Z-Wave) needs a Z-Wave controller such as SmartThings or Home Assistant and has no radio of its own otherwise. The Kidde joins a 2.4 GHz Wi-Fi network directly with no hub.
Sensors
The Fibaro adds tilt and tamper sensing on top of water, temperature and freeze detection, so it also notices if the unit is moved. The Kidde has no tilt or tamper sensor.
Local alert
The Fibaro has both an on-device sound and a light. The Kidde has a sound, but its alert light and its volume are not documented.
Power
The Fibaro runs about two years on a CR123A cell and can be wired to a 12/24V DC source so the battery becomes backup. The Kidde uses two AA cells with no documented runtime.
Integrations
The Fibaro works with Samsung SmartThings and Home Assistant through the hub. The Kidde works with Google Home and Home Assistant, so it adds a voice assistant the Fibaro reaches only indirectly.
Price
The Kidde is the cheaper of the pair. The Fibaro costs more but brings the Z-Wave path, tilt sensing and the wired-power option.
Which one to buy if
- you already run a Z-Wave hub
The Fibaro Flood Sensor (Z-Wave) pairs with your controller and adds water, temperature and tilt sensing.
- you want tilt and tamper detection
The Fibaro raises tamper alerts and detects tilt, which the Kidde does not.
- you have no smart hub and want Wi-Fi alerts
The Kidde joins 2.4 GHz Wi-Fi on its own and works with Google Home and Home Assistant.
- you are covering several spots on a budget
The Kidde costs less and needs no hub, so multiple units stay affordable.
- you want wired power with the battery as backup
The Fibaro can run from a 12/24V DC supply, leaving the CR123A cell as emergency power.
Winner
$60.12
- + Rating: 4.3
- + Sensors: Water Leak, Temperature, Tilt
- + Alerts: Water Leak Alerts, Temperature Alerts, Freeze Temperature Alerts, Tamper Alerts
Price unavailable right now
- - Rating: 3.9 vs 4.3
- - Sensors: Water Leak, Temperature vs Water Leak, Temperature, Tilt
What owners say
Owners of both sensors describe reliable detection and an easy placement, and the two groups part company on what the device connects to. Fibaro Flood Sensor (Z-Wave) owners single out the compact, hideable body, painless pairing with a Z-Wave hub and the combined water, temperature and tilt sensing that also flags freezing pipes, and they like that the optional 12/24V DC feed turns the battery into backup; their caveats are a hub that must be there, no sensor cable in the box, no direct voice-assistant support and a few units that arrive with a low battery. Kidde WiFi Water Leak & Freeze Detector owners value the hub-free setup and freeze alerts, and report Wi-Fi pairing trouble, a hard battery cover and a slow temperature refresh.
Frequently Asked Questions
Which is better overall: Fibaro Flood Sensor (Z-Wave) or Kidde WiFi Water Leak & Freeze Detector?
The Fibaro Flood Sensor (Z-Wave) for a home that already runs Z-Wave. It adds tilt and tamper sensing, an on-device sound and light and optional wired power. The Kidde WiFi Water Leak & Freeze Detector is the better pick for a hub-free home that wants Google Home and Home Assistant and pays less.
What is the biggest difference between the Fibaro Flood Sensor (Z-Wave) and the Kidde WiFi Water Leak & Freeze Detector?
The network. The Fibaro Flood Sensor (Z-Wave) needs a Z-Wave hub and adds tilt and tamper sensing, while the Kidde WiFi Water Leak & Freeze Detector joins Wi-Fi with no hub and links to Google Home and Home Assistant.
Does the Fibaro Flood Sensor (Z-Wave) work without a hub?
No. It connects exclusively over Z-Wave and needs a Z-Wave hub or controller such as SmartThings or Home Assistant with a Z-Wave adapter.
Does the Kidde WiFi Water Leak & Freeze Detector work with SmartThings?
No. It supports Google Home and Home Assistant, with no SmartThings, Apple HomeKit or Matter.
Do both detect freezing pipes?
Yes. Both raise freeze alerts, and both also read temperature; the Fibaro adds a tilt sensor and tamper alerts.
Who should buy the Fibaro Flood Sensor (Z-Wave)?
A Z-Wave or Home Assistant household that wants a compact sensor with water, temperature, freeze and tilt sensing plus the option of wired power.
Who should buy the Kidde WiFi Water Leak & Freeze Detector?
Anyone without a hub who wants a low-cost Wi-Fi sensor that covers leaks and freezing and works with Google Home or Home Assistant.
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