The Best Water Leak Detectors of 2019

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Some of my best childhood memories are from when my basement flooded. I had always wanted a pool, so this was a close second. My parents, on the other hand, were not too thrilled with our basement’s constant flooding. Unfortunately, this was the nineties, so smart water leak detectors hadn’t been invented yet. Lucky for you, this is 2019, and I’ve rounded up the best smart water leak detectors of 2019. Yeehaw! 

From trusted brands like Ring Alarm, Honeywell, and Samsung SmartThings, I’ve selected the best water leak detectors around based on their design, features, installation, and mobile applications. I’ve included options that offer 24/7 professional monitoring as well as some options that you can monitor yourself, avoiding monthly or yearly fees. Put the sensors near a washer, sink, or anywhere where a leak can happen to get notified as soon as it starts. Trust me— your basement will thank you later!

Related: Best Home Security Cameras of 2019 

Best Water Leak Detectors

Editor’s Pick
Ring Alarm Flood and Freeze Sensor
Ring Alarm Flood and Freeze Sensor
Ring Alarm Flood and Freeze Sensor

Those already in the Ring Alarm ecosystem can stop leaks before they happen with the Flood and Freeze Sensor from Ring, one of my favorite smart home companies. 

Doesn't expire

Top Contender
iHome iSB02 Dual Leak Sensor
iHome iSB02 Dual Leak Sensor
iHome iSB02 Dual Leak Sensor

With an integration with Amazon Alexa, easy installation through adhesive strips, and included batteries, the iHome iSB02 Dual Leak Sensor makes monitoring your home's environment simple and convenient. 

Doesn't expire

Best Value
Honeywell RWD21 Water Leak Alarm
Honeywell RWD21 Water Leak Alarm
Honeywell RWD21 Water Leak Alarm

For an incredibly low price, you can catch leaks before they become floods and cost you hundreds in water damages with the Honeywell RWD21 Water Leak Alarm. 

Doesn't expire

Best For A/C Unit
First Alert WA100-3 Water Alarm
First Alert WA100-3 Water Alarm
First Alert WA100-3 Water Alarm

If you're worried your A/C unit is dripping, look no further than the First Alert Water Alarm, which will notify you immediately via a mobile notification and an 85-decibel siren. 

Doesn't expire

Best With Optional 24/7 Professional Monitoring
Samsung SmartThings Water Leak Sensor
Samsung SmartThings Water Leak Sensor
Samsung SmartThings Water Leak Sensor

For a small monthly price, you can get 24/7 professional monitoring for your leak detector, ensuring your home's environment is safe and secure. 

Doesn't expire

Editors Pick

Ring Alarm Flood and Freeze Sensor

Not only does this sensor detect floods, but it can also detect freezing temperatures, which is incredibly useful for making sure your pipes don’t freeze (which could lead to a burst and thus, a flood). If you already have the Ring Alarm base station, the Ring Alarm Flood and Freeze Sensor is a no-brainer solution to your home’s environmental monitoring. 

Pros: Believe it or not, you won’t have to worry about this sensor’s batteries for a whopping three years, the most I’ve seen from a leak sensor. It has a nice temperature range of 32 to 120 degrees Fahrenheit, making it a fine choice for many climates. Finally, I had no trouble monitoring my Ring Alarm Flood and Freeze Sensor through the Ring— Always Home app, which has a 3.3 rating from iPhone and Android users alike. 

Cons: Sadly, the Ring Alarm Flood and Freeze Sensor is a bit overpriced compared to the industry average. I’m also disappointed that I can’t use a Ring Protect plan with my Ring Alarm Flood and Freeze Sensor, as I would’ve liked professional monitoring and cellular backup. 

Shop Amazon
Ring Alarm Flood and Freeze Sensor
Ring Alarm Flood and Freeze Sensor
Ring Alarm Flood and Freeze Sensor

Those already in the Ring Alarm ecosystem can stop leaks before they happen with the Flood and Freeze Sensor from Ring, one of my favorite smart home companies. 

Top Contender

iHome iSB02 Dual Leak Sensor

Did you know that, with the right coverage, the majority of home floods are completely preventable? Enter the iHome iSB02 Dual Leak Sensor, which has a six foot long extension probe for twice the sensing. 

Pros: I love that the iHome iSB02 Dual Leak Sensor works with Amazon Alexa, as it’ll fit right into my Amazon smart home system. Not only is the sensor powered by batteries, but batteries are also included, which is generous. Finally, installing the iHome iSB02 Dual Leak Sensor was super easy due to the adhesive strips on the back. Seriously, even a preschooler could figure this thing out! 

Related: iHome iSP100 Outdoor Smart Plug Review 

Cons: The major drawback of the iHome iSB02 Dual Leak Sensor is the iHome Control app. Unfortunately, it has pretty dismal ratings, a 2.7 on the Apple store and a 2.3 on the Google Play store. 

Shop Amazon
iHome iSB02 Dual Leak Sensor
iHome iSB02 Dual Leak Sensor
iHome iSB02 Dual Leak Sensor

With an integration with Amazon Alexa, easy installation through adhesive strips, and included batteries, the iHome iSB02 Dual Leak Sensor makes monitoring your home's environment simple and convenient. 

Best Value

Honeywell RWD21 Water Leak Alarm

Unlike some water leak sensors on this list, the Honeywell RWD21 Water Leak Alarm stands on its own, with no additional hubs required. That makes its low price even more impressive! 

Pros: It’s easy to monitor your home’s environment with the Honeywell Home app, which is highly-rated by both iPhone and Android users. Installation is simple DIY, as the sensor is battery-powered. And the Honeywell RWD21 Water Leak Alarm doesn’t wait until your basement is flooded to notify you; rather, it’ll let you know as soon as there’s as little as 1/16 of an inch of water! Talk about preventative measures. 

Related: Honeywell Lyric C2 Security Camera Review 

Cons: Unfortunately, Honeywell doesn’t have any professional monitoring available, so you’ll be entirely responsible for monitoring your water leak sensor. I also wish that they included the nine volt battery, which is unfortunately sold separately. 

Shop Amazon
Honeywell RWD21 Water Leak Alarm
Honeywell RWD21 Water Leak Alarm
Honeywell RWD21 Water Leak Alarm

For an incredibly low price, you can catch leaks before they become floods and cost you hundreds in water damages with the Honeywell RWD21 Water Leak Alarm. 

Best For A/C Unit

First Alert WA100-3 Water Alarm

The First Alert WA100-3 Water Alarm is great for under your A/C unit, sink, washer— anywhere where a leak could occur. On top of mobile notifications, the alarm will set off its built-in 85-decibel siren, about as loud as a snow blower.

Pros: The sensors are battery-operated, which makes installation a breeze; plus, the batteries are included. I also appreciate that the sensor has a huge temperature range between 32 and 120 degrees Fahrenheit, as it allows functionality in a variety of climates. All of these features are available for an affordable price when compared to similar models. 

Related: First Alert Professional Review 

Cons: First Alert charges a small fee per month to use their Onelink Home app, which is only made worse by its incredibly low ratings. While Android users gave it a 2.3, iPhone users only gave it a 1.8, citing difficulty connecting. 

Shop Amazon
First Alert WA100-3 Water Alarm
First Alert WA100-3 Water Alarm
First Alert WA100-3 Water Alarm

If you're worried your A/C unit is dripping, look no further than the First Alert Water Alarm, which will notify you immediately via a mobile notification and an 85-decibel siren. 

Best With Optional 24/7 Professional Monitoring

Samsung SmartThings Water Leak Sensor

If you’re already in the Samsung SmartThings ecosystem or want a water leak sensor with optional 24/7 professional monitoring, this is the sensor for you. It requires a SmartThings Hub and works with Amazon Alexa, perfect for those in the Amazon ecosystem as well. 

Pros: One of the coolest things about this water leak sensor is that, if the alarm goes off, you can have other electronics shut down in response to avoid any electrical issues. I love that 24/7 professional monitoring is available for a low monthly cost, or, if you also want security monitoring, a bit more. Finally, the sensor also has temperature monitoring, give you twice the bang for your buck. 

Related: ADT Samsung SmartThings Starter Kit Review 

Cons: Unfortunately, iPhone users may not like the SmartThings app, which only has a 2.9 rating on the Apple store. Also, if you don’t already have the SmartThings Hub, you probably won’t appreciate the extra cost. 

Shop Amazon
Samsung SmartThings Water Leak Sensor
Samsung SmartThings Water Leak Sensor
Samsung SmartThings Water Leak Sensor

For a small monthly price, you can get 24/7 professional monitoring for your leak detector, ensuring your home's environment is safe and secure. 

Water Leak Detector Methodology

Water Leak Sensor Methodology
Water Leak Sensor Methodology

Maybe you’re shopping around for the best water leak detector for your home, or maybe you’re simply curious about how I chose my selections. Here are some factors to keep in mind: 

  • Power: The majority of water leak sensors are battery-powered, but the lives of those batteries can differ greatly. Also, some sensors include batteries while some don’t, which can add to the overall cost. 
  • Smart Platform Integrations: If you’re already in the Amazon, Google or Apple smart home ecosystem, then you should look for a water leak detector that’ll work with your voice assistant. 
  • Installation: Being wireless, the majority of water leak detectors are pretty simple to install, with adhesive strips for easy stick-and-peel. Of course, this is not always the case, so installation is something you should definitely research before buying. 
  • Requirements: While some water leak detectors require base stations, bridges or hubs, others stand alone. Again, this is something that could add greatly to your cost, so it’s essential to take into account. 
  • Professional monitoring: The majority of water leak detectors can be self-monitored through mobile applications, but some companies also offer 24/7 professional monitoring for monthly or yearly prices. I prefer professional monitoring as it ensures that any home emergency will be dealt with, but I also understand wanting to avoid those pesky fees. 
  • App: Finally, the water leak detector should have a user-friendly app that lets you easily monitor and control the device itself.

Tips for Water Leak Detectors

Here are some best practices when shopping for and using water leak detectors:

  • Make sure you can hear the siren: Many water leak detectors have built-in sirens to ensure that you’re notified of a leak, but depending on your hearing and the placement of the sensor, you may or may not be able to hear it. Find out how many decibels the siren is and test it out yourself.
  • Check out app reviews: App reviews tend to fluctuate over time, so before you settle on any water leak detector, check its most recent ratings on the Apple or Google Play stores, depending on your mobile device of course. A simple software update can dramatically change the overall user experience.

Recap of the Best Water Leak Detectors of 2019

That’s it for the best water leak detectors of 2019! The truth is, floods don’t need to happen, and solutions can be really simple and affordable. If you’re still stumped about which water leak sensor is right for you, feel free to leave a comment or a question below. I’m happy to give out personal recommendations and I hope to hear from you soon! In the meantime, remember— be secure. 

Gabe Turner

Gabe Turner

Gabe Turner is an attorney and journalist with a passion for home tech and secure, efficient living. Since graduating from NYU Law, he has maintained a paradoxical existence of trying to live life adventurously while remaining staunchly risk-averse. He is torn by the dual desires of wanting to only be in Brooklyn writing about housing policy and smart home tech and aspiring to visit his friends scattered across the globe. Gabe believes that stable, safe communities are the cornerstone to a vibrant and healthy society, and it is this passion that brought him to contribute to Security Baron.

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