Moen Flo Smart Water Leak Detector, Water Sensor Alarm for Home, 1-Pack, White, 920-004


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Purchase options and add-ons

Color White
Brand Moen
Power Source Battery Powered
Compatible Devices Washing Machine
Product Dimensions 2.64"L x 1.5"W x 3.25"H

About this item

  • PROTECT YOUR HOME FROM WATER DAMAGE: Can be placed in the home wherever there is a risk for potential water damage, such as a flooding basement, washing machine leak, hot water tank failure, etc.
  • 24/7 PROTECTION: Smart technology detects leaks to help reduce the risk of water damage by providing 24/7 monitoring
  • REAL-TIME NOTIFICATIONS: Connects to the Moen Smart Water App to notify you of moisture through notifications to their smartphone. The Moen Smart Water App can also be customized to monitor moisture levels, humidity, and temperature.
  • WHOLE-HOME PROTECTION: Offers the ability to use and connect multiple detectors for whole-home protection. Available in single or multi-packs, providing the opportunity to achieve home water management on any budget
  • COMPATIBILITY: Use the Smart Leak Detector as a standalone monitoring device or connect it to the Flo Smart Water Monitor and Shutoff (sold separately) for whole-home protection.
  • REMOTE SENSING DISC: Includes an extension cable with Remote Sensing Disc that can extend up to 48 inches, making it perfect for reaching tight spaces like under a washing machine or next to a dishwasher.
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Customer ratings by feature

Accuracy
3.5 3.5
Value for money
3.5 3.5
Easy to install
3.2 3.2
WiFi signal
3.1 3.1

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This item: Moen Flo Smart Water Leak Detector, Water Sensor Alarm for Home, 1-Pack, White, 920-004
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Get it as soon as Monday, Jul 29
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From the manufacturer

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Peace Of Mind

This Smart Leak Detector can be placed anywhere in your home where water leaks and moisture could be a problem from environmental factors or fixture malfunctions, such as the basement or laundry room, to provide 24/7 protection. When water, excess humidity or extreme temperatures are detected, the unit sends an alert via the Moen Smart Water App, sounds an audible alarm, or emits a blinking LED light.

A System Designed to Detect and Protect

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Control From Your App

Connects to the Moen Smart Water App to notify you of moisture through notifications to their smartphone. Smart technology detects leaks to help reduce the risk of water damage by providing 24/7 monitoring.

Wi-Fi Enabled

The included smart water-level sensor constantly monitors the water level in the sump pump basin in real time to assess flooding risks and if the sump pump is working efficiently.

Freeze Alerts and Humidity Monitoring

Alerts of extreme abnormalities in temperature, which could indicate a risk for freezing pipes in the basement or crawl space. The device also monitors humidity levels to help detect any moisture abnormalities that could lead to mold.

Battery Operated

Each Detector includes a CR123A lithium battery for up to 2 years of leak detection for your home.

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Discreet Placement

The Smart Leak Detector can be easily placed under sinks and appliances, near pumps, drains, windows, or in attics.

Multi-Pack Available

Available in single or multi-packs, providing the convenience of detecting water in multiple locations but managed through one mobile app.

Complete The Home

The Smart Leak Detector can be purchased as a standalone product or combined with the Flo Smart Water Monitor and Shutoff for whole-home protection.

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Water designs our life. Who designs for water? Moen.

For over 75 years, Moen has thrived at the intersection of style and innovation. And with 1.5 trillion gallons of water running through our faucets each year, we feel a tremendous responsibility to make sure every one of your interactions with water is a meaningful one. In 2022, Moen was named America's Most Trusted Faucet Brand by Lifestory Research for the seventh year in a row.

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Technical Details

Additional Information

Warranty & Support

Amazon.com Return Policy:Amazon.com Voluntary 30-Day Return Guarantee: You can return many items you have purchased within 30 days following delivery of the item to you. Our Voluntary 30-Day Return Guarantee does not affect your legal right of withdrawal in any way. You can find out more about the exceptions and conditions here.
Troubleshooting Guide Troubleshooting Guide [PDF ]

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Moen Flo Smart Water Leak Detector, Water Sensor Alarm for Home, 1-Pack, White, 920-004


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Product Description

Protect your home from water damage with the Moen Smart Leak Detector. This Smart Leak Detector can be placed anywhere in your home where water leaks and moisture could pose a hazard. The water leak detector can identify problems caused by environmental factors or fixture malfunctions, in places such as the basement or laundry room, to provide 24/7 protection. When water, excess humidity, or extreme temperatures are detected, the water leak sensor sends an alert via the Moen Smart Water Network App, sounds an audible alarm, or emits a blinking LED light. Combine the Smart Leak Detector with the Flo Smart Water Monitor and Shutoff for whole-home protection.

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Moen Flo Smart Water Leak Detector, Water Sensor Alarm for Home, 1-Pack, White, 920-004
Moen Flo Smart Water Leak Detector, Water Sensor Alarm for Home, 1-Pack, White, 920-004
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Price-38% $31.00
List:$49.99
-40% $29.99
List:$49.99
-22% $69.99
List:$89.99
$89.99$49.99-17% $19.99
List:$23.99
Delivery
Get it as soon as Monday, Jul 29
Get it as soon as Tuesday, Jul 30
Get it as soon as Monday, Jul 29
Get it as soon as Monday, Jul 29
Get it as soon as Monday, Jul 29
Customer Ratings
Easy to install
3.2
4.9
4.4
4.8
4.7
WiFi signal
3.1
4.4
4.6
5.0
5.0
Battery life
2.7
4.9
4.4
4.9
4.8
Tech Support
2.6
4.2
4.4
5.0
4.8
Value for money
3.5
4.9
4.6
4.7
Sold By
Hem Logistics
Woot
GoveeLife US Direct
Yosmart
X-Sense US
Yosmart

Important information

Bulb Voltage

0 volts

Customer reviews

3.8 out of 5 stars
3.8 out of 5
2,311 global ratings

Customers say

Customers like the leak detection of the product. They say the sensor picks up even a drop of water. However, some customers have reported connectivity issues and battery life issues. Opinions are mixed on ease of setup, performance, app, quality, and water resistance.

AI-generated from the text of customer reviews

54 customers mention "Leak detection"38 positive16 negative

Customers like the leak detection of the alarm. They say the sensors pick up even a drop of water, and the devices do an excellent job detecting water. Some mention that the primary sensor responds quickly to water.

"...I'm very impressed!! The sensors pick up even a drop of water...." Read more

"...Eventually it worked.Pros- Compact water leak sensor that can be placed directly on the surface, or connected to a remote sensor..." Read more

"...Turns out my AC condensation was leaking onto the floor and the detector tripped. I sent a friend over and he found a puddle...." Read more

"...these sensors provide the assurance that your property is safeguarded against water leaks, ensuring a safer and more secure living environment." Read more

272 customers mention "Performance"123 positive149 negative

Customers are mixed about the performance of the alarm. Some mention it works well, is relatively cheap, and a worthwhile investment. However, others say that it's not satisfactory for their purpose, and the protective shield doesn't work.

"...Turns out my AC condensation was leaking onto the floor and the detector tripped. I sent a friend over and he found a puddle...." Read more

"...Otherwise, it's an excellent product! It still works well and does the job even when not stuck to the wall so it deserves 5 stars...." Read more

"...When inserted correctly between the posts it didn't activate...." Read more

"...All worked well. After a year or so, my wifi was upgraded at my house. Now I coukd not reconnect the units to the wifi in my house...." Read more

160 customers mention "Ease of setup"99 positive61 negative

Customers are mixed about the ease of setup. Some mention it's fairly easy to set up and the install of the sensor is not technically difficult. However, others say that it'd take over an hour to set it up, the instructions are small and the error message is not intuitive.

"...I've had these for several months so far. They were very easy to install and easy to set up with wifi. They never seem to go offline either...." Read more

"...appear to be working fine, but I was really unimpressed with the setup process that kept failing. Eventually it worked.Pros-..." Read more

"...That’s my experience. These Moen installed easily, as my 2.4 wifi worked well with them...." Read more

"...the general review of 3 stars because the one that did work was very easy to set up and took very little time or effort." Read more

87 customers mention "Quality"34 positive53 negative

Customers are mixed about the quality of the alarm. Some mention it provides great notification alerts not only for water issues but temperature and humidity. They also appreciate the capabilities, easy setup, reliable alerts, and integration with smart devices. However, some say that the alarm is not loud enough to install in their basement and the beep could be louder.

"...The alarm volume is a joke. You cannot hear it 30 ft away unless the home is completely silent...." Read more

"...Gives you the temp and humidity. And you can set the type notifications and what info...." Read more

"...Audible alarm, not terribly loud, and alerts on my phone. But if set up properly you will be notified-..." Read more

"...Its efficient detection capabilities, easy setup, reliable alerts, and integration with smart home systems make it a worthwhile investment...." Read more

62 customers mention "App"23 positive39 negative

Customers have mixed opinions about the app. Some find it good, comprehensive, and easy to setup. They say it's rock solid and provides the most customizable settings for sending alerts. However, others say that it'll be a little wonky during setup, needs improvement, and is glitchy.

"...The main issue was that the app kept returning an error message during installation when trying to connect to my home wifi network...." Read more

"...And it worked flawlessly by sending an alert. I also liked the app very much. Gives you the temp and humidity...." Read more

"Their app is a little wonky during setup. I had to reset the unit a couple of times and start over to get through the process...." Read more

"...minutes per sensor (not a "few minutes) this step is glitchy, the app freezes and I hard to restart this on 3 sensors...." Read more

40 customers mention "Water resistance"16 positive24 negative

Customers are mixed about the water resistance of the alarm. Some mention that the devices detect water within seconds, are very sensitive to moisture, and can be individually set to shut off water. Others say that the unit failed to detect water when tested, the sensor is not water proof, and stays wet.

"...One of the units would not detect water...." Read more

"...Its efficient detection capabilities, easy setup, reliable alerts, and integration with smart home systems make it a worthwhile investment...." Read more

"...installation I received an alert of a critical issue and the water had been shut off. Since work was 40 minutes away, I waited until I got home...." Read more

"...Features/Use: The devices detect water within seconds, if you have a Flo by Moen Smart Water Shutoff they’ll quickly turn off the water...." Read more

163 customers mention "Battery life"15 positive148 negative

Customers are dissatisfied with the battery life of the alarm. They mention that the battery only lasts a few months, and that the two-year lithium battery life is not accurate. Some say that the sensor may report confusing battery life initially.

"I love these devices but I hate the cost cutting of batteries only. In theory, you put these were water can leak but you would not notice in time...." Read more

"...I easily installed all 12 Moen units. One did come with a dead battery...." Read more

"...to make the electric connection were so far apart that the battery was loose inside? If these are hand inserted, how does this not get noticed?..." Read more

"...the battery ajar and insulating strip off to the side so the battery had been draining since it was installed by the manufacturer...." Read more

154 customers mention "Connectivity"15 positive139 negative

Customers have issues with the connectivity of the alarm. They say it loses connection to their home network, and starts to drop connections. Some customers also report issues with connecting to the app.

"...Ideally, it is better on AC. If you lose power, the device cannot talk to the wifi so the only reason for the batteries is bottom line cost and..." Read more

"...batteries before you install them, mine were at 64%, 47% and too low to even connect to...." Read more

"...At the end of the set up it wanted me to link to Alexa which I don't have...." Read more

"...(without VPN), went through installation again, and still hit a connectivity error when trying to get on to my home network...." Read more

Water Detectors a challenge to connect, work well
4 out of 5 stars
Water Detectors a challenge to connect, work well
I decided to buy this product as a baby step toward perhaps getting the full-on Flo automatic valve...and maybe to allow time for that product to improve and for me to fix some existing minor leaks around the house.As noted many times here, there are challenges to connect the water detectors. I have an eero router system (earlier version) and got hint from reddit that installing these via the guest network was a way to make them work. Tried first with regular (non-guest) network; got to stage where the detector's light was shining solid purple. The in-box instructions say that means "Detector has local, direct connection to mobile device." Huh? Is that good or bad or a dead end?I treated it as a dead end and then attempted to connect to eero guest network, and that was a success. Battery life for first detector showed 84%, probably from the light being on a while in first attempt. But after more swiftly connecting the other two detectors, they both showed 100% battery life. Temperature and humidity readings appear to be in line with readings from other devices I have, and all three successfully sent a "critical alert" to my phone when I placed them in shallow water.The app is good with settings for sending alerts being customizable, i.e., how high or low a temperature or humidity level you consider normal before being alerted. Setting up the app does ask many questions about your home because the app assumes you are installing the $500 Flo auto-shut-off valve. It would be more efficient and less invasive if it asked what you are installing first since it can't use most of the information if you are installing just the detectors, not the valve.Bottom line: I did some homework ahead of installation to see how to connect via my particular router and it proved necessary to use the work around. This product is not mature in that sense, but it is working well now that I've made the connection, and the app is good for its customizations and readability. (I did not use tech support.)
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Top reviews from the United States

Reviewed in the United States on September 11, 2023
Color: WhiteSize: 3 SensorsVerified Purchase
Excellent product even without the main shut off valve. I've had these for several months so far. They were very easy to install and easy to set up with wifi. They never seem to go offline either. I'm very impressed!! The sensors pick up even a drop of water. I had thrown a wet shower cap under my sink along with all my other toiletries and even the few drops that fell from the shower cap was detected. I got a alert on my app and an email alert. I'm definitely going to consider investing in the shut off valve.

My only complaint is that the sticky pad that holds the sensor box on the wall is VERY WEAK! The stick doesn't hold up for more than an hour. Moen should consider correcting this. Otherwise, it's an excellent product! It still works well and does the job even when not stuck to the wall so it deserves 5 stars. You can't go wrong with this!
5 people found this helpful
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Reviewed in the United States on July 24, 2022
Color: WhiteSize: 3 SensorsVerified Purchase
I love these devices but I hate the cost cutting of batteries only. In theory, you put these were water can leak but you would not notice in time. These would go under counters, in attics, in washrooms, and other areas that often are difficult to reach. I would pay double the price to have an AC adapter option. Exactly 1 year into my install the batteries are failing and the batteries are expensive and not environmentally friendly to dispose of batteries. The battery cost and hassle of replacing and buying batteries every year makes this product less than it could be. Ideally, it is better on AC. If you lose power, the device cannot talk to the wifi so the only reason for the batteries is bottom line cost and agency approvals. It was a marketing decision....not an engineering decision. I would buy another 3 pack and pay the additional cost of having the AC option.

2/24
I am done. I have come to hate the Moen design. The base unit does not sit flat in a cabinet and when you use the expensive cord it also does not sit flat. Where you put these devices is subject to disruption so the sensors are always getting moved which the design should expect but not with Moen. If you bump the cradle the connection to the sensor wire is lost and you will never know. The battery life is more like 8 months at most and I have had these long enough to prove it. The alarm volume is a joke. You cannot hear it 30 ft away unless the home is completely silent. How ridiculous to make an alarm and make it so quiet that if it is in a cabinet closed then no one will hear it beeping. I am moving to a D-Link that is a different setup and after Moen I can see why the D-Link makes sense and cents. It uses a hub that plugs into AC and has a "screaming" loud alarm. The Hub supports up to 24 sensors making the D-Link similar in price for the first 2 sensors but you saves hundreds of dollars if you need 6 or more. With the new system, you take a $25 sensor and place it on the floor of the cabinet, pan, or wet area floor. No mounting, no harness. The sensors link to the hub and that links to an app on your phone.
23 people found this helpful
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Reviewed in the United States on April 26, 2023
Color: WhiteSize: 3 SensorsVerified Purchase
I just installed 12 units in my house. As a background, I had a different brand installed in my house and second home. All worked well. After a year or so, my wifi was upgraded at my house. Now I coukd not reconnect the units to the wifi in my house. But the units continued to work at my second home. So, after not having leak detectors for some time, the hose on our dishwasher broke and was flooding our kitchen. Luckily I was right there when it happened and shut the water down, which brings me back to how important leak detectors are. So after searching, I decided on the Moen. I easily installed all 12 Moen units. One did come with a dead battery. The issue I see that many have is that these units have to connect up to Wifi 2.4 and not your general 5.0 wifi. And some wifi appliancees out there are pretty ‘picky’ on which 2.4 works. That’s my experience. These Moen installed easily, as my 2.4 wifi worked well with them. My experience has been some brands will work with my wifi and others won’t. I’m lucky with the Moen.
I also tested one by purposely putting a very slight film of water around a detector. And it worked flawlessly by sending an alert. I also liked the app very much. Gives you the temp and humidity. And you can set the type notifications and what info.
So far I’m very pleased. Just be aware of those who had trouble connecting or staying connected. Comes down to the quality of their Wi-Fi. Like I said, some brands will work for you, and others won’t. I’m happy.
23 people found this helpful
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Reviewed in the United States on October 8, 2023
Color: WhiteSize: 3 SensorsVerified Purchase
I just set up these Flo by Moen sensors. They appear to be working fine, but I was really unimpressed with the setup process that kept failing. Eventually it worked.

Pros
- Compact water leak sensor that can be placed directly on the surface, or connected to a remote sensor (included).
- Audible alarm, not terribly loud, and alerts on my phone. But if set up properly you will be notified
- Integrates with the Flo by Moen water shutoff valve to turn water off automatically

Cons
- Installation/Configuration process is a little janky. You have to connect to a local device provided WiFi network to configure, but also need to have internet access. I had well over a dozen failures during configuring the three sensors I purchased. Just a little frustrating, and they should wait until after you connect the device to your WiFi network to update firmware as it would go much smoother.
- Plan on replacing the batteries before you install them, mine were at 64%, 47% and too low to even connect to. Also, one unit had the battery contacts spread so wide that there was over 1/8" gap between the battery and the second contact. Easy fix, but that should not happen on a new device.
- I would prefer that I did not have to use their cloud service to get these working, I would much prefer local connection so it would work fully if the internet was out. Just a personal preference.
8 people found this helpful
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Top reviews from other countries

Barry S
5.0 out of 5 stars Very sensitive
Reviewed in Canada on May 22, 2024
Color: WhiteSize: Leak-Sensor Cable OnlyVerified Purchase
As an add on to the Flo sensor it works great going around the hole for our sump pump. Very sensitive so when testing just make a spot damp. It will keep going off until dry lol
Jeffrey E.
5.0 out of 5 stars Easy to setup, works great
Reviewed in Canada on January 24, 2023
Color: WhiteSize: 1 SensorVerified Purchase
I've been looking around for a battery operated water sensor, this one was a little on the pricey side. But the app was easy to use and setup. If you have a bandsteering unified wifi you might momentarily lose connection during setup if your phone is setup to use 5Gz, as this is a 2.4Ghz, the device will momentarily show disconnected during the setup phase, disconnect from your wifi and reconnect and you'll be fine, I had it up and running in 10 minutes. I dont know why people were complaining finding batteries for this, any of the big box stores have them. And if yours came with a dead battery return it for a new one.
4 people found this helpful
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RedVortex
5.0 out of 5 stars Works very well, easy to setup
Reviewed in Canada on December 16, 2021
Color: WhiteSize: 3 SensorsVerified Purchase
Took me only a few minutes to get everything setup and working. I'm monitoring for water leak and temperature in the garage during winter in case of freezing. I'm also monitoring temperature/humidity and water leak in the basement near the water heather and the main entrance. I spilled water in the garage near the sensor the other day and I immediately received the SMS alert and app notification of a water leak. Great stuff, I highly recommend it, I'm less stressed about water leak and winter freezing the pipes because of a heating system failure now that I have this that can monitor both and alert me through multiple means (sms, email, phone call, app notification). Their system can also alert you if the devices did not report to their system recently so you know something failed or is not working or you have a power loss, good job Moen !
One person found this helpful
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Paul Wilson
1.0 out of 5 stars Associated Android app only available in US and Canada
Reviewed in the United Kingdom on January 13, 2024
Color: WhiteSize: 3 SensorsVerified Purchase
After reading good reviews of this product ordered a box of three. The instructions, received upon arrival said "download associated app before unpacking" .

Went to Google playstore. App "not available in your region". Huh? Tried using another device. Same. Went to company website. Very unhelpful, and trying to find email contact almost impossible. After 30 mins tracked one down. Fired off email. 24 hours later no reply. Resorted to social media. At last a response: "Android App only available in US and Canada". Well what a waste of time that was. Product therefore almost useless and returned. Luckily the seller was superb and understanding and refund easily obtained.

So don't buy if you want the product to work with the android app!!
One person found this helpful
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Ignacio Arellano
5.0 out of 5 stars EXCELENTE DETECTOR DE AGUA
Reviewed in Mexico on April 6, 2021
Color: WhiteSize: 3 SensorsVerified Purchase
SE INSTALA FACILMENTE Y LA APP FUNCIONA DE LO MEJOR