If you’ve ever come home to a soggy basement or found out too late that your kitchen sink or toilet has a slow leak, you know how expensive it can be to repair or replace carpets, flooring, and walls with water damage. Finding leaks before they cause major damage is now easier than ever, thanks to water-sensing smart home devices that send alerts to your phone when they detect moisture. They range in complexity from simple puck-shaped sensors that you place on the floor to in-line systems that monitor your water flow rate for irregularities that might indicate leaks. At PCMag, we’ve been reviewing smart water sensors for nearly a decade. The First Alert L1 is our Editors’ Choice for its easy installation, responsive performance, and reasonable price. But it isn’t the only model we recommend, so read on for all of our top picks.
Deeper Dive: Our Top Tested Picks
EDITORS’ NOTE
October 28, 2025: With this update, we have removed the Kangaroo Water + Climate Sensor, as it is no longer available. Our remaining picks have been vetted for currency and availability.
(Credit: First Alert)
(Credit: First Alert)
Pros & Cons
Integrated temperature and humidity sensors
Includes a five-foot sensor cable
Long extension cable reach
Easy to install
Doesn’t work with Alexa, Google, or HomeKit
Lacks third-party integrations
Bottom Line
The First Alert L1 is a battery-powered sensor that sends alerts to your phone when a sink or appliance springs a leak or when the temperature drops below a certain level.
Specs & Configurations
Type of Protection
Spot
Connectivity
Wi-Fi, Bluetooth
Smart Home Integration
None
Voice Control
None
Learn More
First Alert L1 Wi-Fi Water Leak and Freeze Detector Review
Pros & Cons
Whole-home water usage reporting
Leak detection
Automatic shutoff and remote shutdown
IFTTT and voice control support
Expensive
Requires professional installation
Long learning period
Lacks user-defined high-usage thresholds
Bottom Line
The Flo by Moen is a smart water meter that monitors water usage throughout your home, tests your system for leaks, and protects against water damage with an automatic shutoff feature.
Specs & Configurations
Type of Protection
Whole-Home
Connectivity
Wi-Fi
Smart Home Integration
IFTTT
Voice Control
Amazon Alexa, Google Assistant
Learn More
Flo by Moen Smart Water Shutoff Review
Pros & Cons
Detects leaks and monitors water usage
No plumbing work or wiring required
Supports Amazon Alexa voice commands
Limited smart integrations
Doesn’t support Google Assistant, HomeKit, or IFTTT
No water shutoff
Bottom Line
The Flume 2 is a wireless whole-home smart water monitor that connects to your phone and Amazon Alexa to detect leaks and tell you how much water you’re using.
Specs & Configurations
Type of Protection
Whole-Home
Connectivity
Wi-Fi
Smart Home Integration
None
Voice Control
Amazon Alexa
Learn More
Flume 2 Smart Home Water Monitor Review
Pros & Cons
Easy to install
Responsive
Temperature and humidity alerts
Works with Phyn Plus auto-shutoff valve
Sensor cable costs extra
Doesn’t work with third-party devices or support voice control
Bottom Line
The Phyn Smart Water Sensor is easy to install anywhere in your home and will tell you when you’ve sprung a leak and when your temperature and humidity thresholds are breached.
Specs & Configurations
Type of Protection
Spot
Connectivity
Wi-Fi
Smart Home Integration
None
Voice Control
None
Learn More
Phyn Smart Water Sensor Review
Pros & Cons
Easy to install
Relatively affordable
Leak and temperature warnings
Doesn’t work with Alexa, Google Assistant, HomeKit, or IFTTT
Requires a hub
Bottom Line
Orbit’s B-Hyve Smart Flood Sensor will tell you when you’ve sprung a leak or when your pipes are in danger of freezing, but it doesn’t work with third-party smart devices.
Specs & Configurations
Type of Protection
Spot
Connectivity
Wi-Fi
Smart Home Integration
None
Voice Control
None
Learn More
Orbit B-Hyve Smart Flood Sensor Review
Pros & Cons
Responsive.
Interacts with other HomeKit devices.
Loud siren.
Easy to install.
Lacks Wi-Fi.
Only works with HomeKit.
Requires Apple TV or HomePod for integrations.
Bottom Line
The Eve Water Guard will let you know if you’ve sprung a leak and has the ability to trigger other HomeKit devices, but otherwise offers limited third-party support.
Specs & Configurations
Type of Protection
Spot
Connectivity
Bluetooth
Smart Home Integration
Apple HomeKit
Voice Control
None
Learn More
Eve Water Guard Review
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The Best Smart Water Leak Detectors for 2025
Compare Specs
Buying Guide: The Best Smart Water Leak Detectors for 2025
What Is a Water Leak Detector?
The most basic DIY devices are battery-operated discs or small boxes that simply sit on the floor where leaks might occur, such as directly under a refrigerator, sink, toilet, or washing machine. They typically have two or more metal sensor terminals (feet) that are in contact with the floor, plus built-in Bluetooth or Wi-Fi radios to connect with your phone. The sensor triggers when the feet come in contact with water; typically, just a few drops set it off. The device then sends a push alert or email (or both) and sounds an alarm. Make sure to look for a sensor that offers a reasonably loud siren that you can hear from anywhere in your home.
Of course, there’s always the possibility that leaking water begins to puddle in an area adjacent to the sensor’s location. To make sure that you get an alert before too much water accumulates, purchase a pack that comes with multiple sensors that enable you to expand the water detection range. Alternatively, purchase a sensor that comes with an extension cable. In most cases, the entire extension cable acts as a long, flexible sensor. You can hang this type of water sensor on a wall (with the cable resting on the floor) or place it directly on the floor along with the cable for maximum coverage.
Orbit’s B-Hyve Smart Flood Sensor comes with three tiny spot sensors and a plug-in hub that connects them to your home Wi-Fi (Credit: Orbit)
Although smaller, battery-powered sensors are great for detecting leaks in obvious places, they won’t tell you if there’s a leak in plumbing that resides behind your walls or in your ceiling. Granted, if water is leaking from a ceiling pipe, you’ll eventually find out. But by that time, you are likely dealing with damaged ceiling tiles and drywall, as well as possible wood rot. For whole-home protection, look for a leak detection system that monitors your entire water delivery system.
These types of systems usually need to operate in-line, in an area close to your water meter. They also likely require professional installation because they become a part of your plumbing system. As water flows through the device, it gathers information about your delivery system, such as flow rate, pressure, and temperature. Once it learns the particulars of your home’s water system over time (usually a week or two), it sends an alert if your water usage spikes or your water pressure changes, both of which may indicate a broken pipe or a faucet that has been left on. These devices can also tell you if you have a slow drip situation somewhere in your system, and if your water temperature is too cold, a condition that can lead to burst pipes.
A handful of in-line smart monitors do more than just warn you of potential trouble: They generate daily, weekly, and monthly usage reports, plus tell you how much water each fixture (such as a shower, sink, or garden hose) uses. Additionally, they run system health tests periodically, looking for abnormal pressure or flow rates. If they detect a problem, they automatically shut off the entire water supply to your home. These systems are ideal if you’re frequently away from home or have a second home that remains empty for long stretches.
What Makes a Leak Detector Smart?
A smart water sensor can communicate with your phone in several ways. Some sensors are Bluetooth-only, which means you must be within range of the device (typically 40 feet or so) to receive alerts and silence alarms. If you want to receive alerts and control the sensor while you’re away from home, make sure the device has a Wi-Fi radio or is part of a connected home automation system.
For anyone who lives in a climate where frozen pipes are a reality or where heat and humidity levels tend to run high, look for a water sensor that also monitors environmental conditions. If your sensor has built-in temperature and humidity sensors, it can send alerts when conditions reach a certain threshold. For example, if you live in a cold climate, you can set the sensor to alert you if the temperature drops to 32 degrees Fahrenheit, a level that can lead to burst pipes. Similarly, if you live in a hot climate with muggy conditions, you can configure the sensor to alert you when the humidity level hits 55% or higher to avoid mold growth. Abnormally high humidity levels can also indicate water leaks.
The Flume 2 system consists of a strap-on water sensor and a Wi-Fi bridge (Credit: Flume)
If you want your water sensor to do more than let you know that you have a leak, look for one that works with other smart devices. Alexa, Google Assistant, and Siri voice compatibility let you silence alarms or check temperature and humidity levels simply by asking. Ideally, you want the sensor to trigger another device that can help minimize damage from the leak, such as a fan or a dehumidifier.
Recommended by Our Editors
Some water sensors are part of a family of smart devices from a single manufacturer that all work with the same app. If you choose a standalone sensor, make sure it supports IFTTT or is compatible with a home automation platform such as Alexa, Google Assistant, HomeKit, or SmartThings. With IFTTT, you can create applets that allow the sensor to trigger other compatible devices, such as smart plugs and thermostats. Most home automation systems let you create automations or scenes to configure connected devices to work with each other.
How Much Does a Water Leak Detector Cost?
Smart water sensors cost anywhere from $50 to over $500. The more affordable models are just leak detectors that typically lack a Wi-Fi radio and communicate via Bluetooth or work as part of a home automation system. You pay more for features like environmental monitoring, extension cables, sirens, and LED indicators, as well as numerous integration options such as voice control and support for IFTTT. At the high end are the in-line systems that monitor your entire home and shut off your water if they detect a serious problem. Keep in mind that, in addition to a steep price, in-line systems require professional installation, which likely adds $200 or more to the total price.
For help getting started, see our story on how to set up your smart home.
