The Moen White Flo Smart Water Leak Detector, 3-Pack, is a standout choice for homeowners prioritizing home protection and peace of mind. Its efficient detection capabilities, easy setup, reliable alerts, and integration with smart home systems make it a worthwhile investment. Whether you're at home or away, these sensors provide the assurance that your property is safeguarded against water leaks, ensuring a safer and more secure living environment.

I bought these to replace a set of Roost detectors with which I had no issues for a number of years, but retired when it was clear they were no longer part of Roost's primary business model. After installing the Flo detectors my network (Orbi, with which I had never had any issues) started to drop connections, show incredible amounts of packet loss, etc. I spent months troubleshooting with my ISP, replaced my Orbi system with a eero system and fully disconnected and reinstalled my Sonos system. ISP was sure it was not their issue because on reboot signal and speed were great. I finally gave up and pulled the batteries from all of my Flo devices. Network has been fine since then. That suggests that these detectors were a waste of money and the cause of a giant headache. On the plus side: I like the Flo app; we have friends who swear by the water shutoff option; the detectors themselves are easy to set up.

As other reviews state, the single unit I ordered arrived with the battery ajar and insulating strip off to the side so the battery had been draining since it was installed by the manufacturer. After setup, the Flo app indicated about 60% battery life remained. Will be good if Moen sends a new battery...time will tell. App installed on iPhone 13mini running iOS 16+. Many questions to answer to register but par for course these days. First try to connect to our home WiFi seemed to work (I had no prompt I entered my password incorrectly) but after finding the system not connected, I figured out the problem on second try. The app seems well designed. I set the acceptable operating range of humidity, and temperature I wanted and checked the boxes for email, text, and push alerts. After testing the hardware, I have yet to figure out how to delete the activity log, but the log can be filtered, collapsed and hidden. The alarm events can be deleted (just not the log). The primary sensor responded quickly to water. The main unit responds with beeping alarm for about 10 seconds and then stops and would not respond again if it remains sitting in water. If it dries, and is wetted again, a new alarm event occurs without manually resetting anything. The alarm beeping sound measured roughly 62dB at a distance of 5ft (1.5m). A nearby gas, forced-air furnace totally masked the sound of the alarming detector. Given the alarm shuts off after apprx 10 sec., one would need to be nearby, in the room to have a chance of seeing the LED or hear the alarm. (I believe most smoke alarms register around 95+dB for comparison). Don't count on hearing this alarm over other household noise. Disappointingly, the primary alarm sensor toggles to the remote sensor when the remote sensor is plugged in. I was hoping to place the primary sensor on a floor drain covering and the remote sensor under the washing machine so if the drain from other sources backs up or the washing machine leaks, I would get an alert. You have a choice of one sensor or the other, but not both. The remote sensor responded quickly to water. To bluntly test for low temperature, I set the low end of the desired operating range to 40F (4.5C) and placed the unit outside where the winter temperature was 28F (-2C). The unit sensed the 40F (4.5C) lower limit in roughly 15 minutes and triggered the text and emails as expected. This 15 min delay was comparable to another remote sensor for a smart thermostat I also placed outside (indoor room temp. was approx 70F (21C). I did not examine how loud or if the alarm sound changes between the different sources of alarm (cold or moisture) but I did not hear the alarm inside when and if it was audible outside. I have no experience with other similar sensors on the market today so a comparison isn't possible. I hopt these details can provide someone else useful information from which to make their own comparisons. I think for the price, and having experienced two human caused basement floods and one nature based flood during a deluge of rain, I'm satisfied with this purchase so far. Suggestions would be to allow for a volume adjustment of some sort (like toggle 62dB or 110dB) so the user doesn't have to rely only on text and email alerts, don't shut off one sensor when the other is active (better value for the $), add feature such as multiple emails to the app so that some users could receive alerts but not have access to the settings (i.e. for renters vs administrator, etc.) Hopefully my mostly positive impressions last as time goes on....speaking of which....how long does the battery last when it has 60% of life remaining....time will tell when the unit sends the 20% remaining battery warning I also triggered to 'on'.

I found the overall setup process for these to be pretty painless, much like a lot of other "smart" devices these days. It's worth mentioning we have them on a separate wireless network we run for "IOT" devices (one of 5 wireless networks in the house.. Working in enterprise IT makes you bring those kinds of ideas home with you!), which is isolated from everything but internet access, and still had no issues. I always put this kind of information in reviews, because some devices will not work properly on separate networks, or you'd have to join your phone to that network first to complete the setup, etc, but since these advertise their own wireless network during the setup phase, and you join your phone to that to enter the details of the network you want them to run on, it wasn't an issue. One thing I would strongly suggest, though, is that you test each one. We put 3 of them in, 2 with the add-on water sensing cables that detect water along their entire length. I decided to test each one to make sure they worked and that the app alerts worked, and also to see how loud the built-in siren is (not very). One of the units would not detect water. I tried different sensors (the built-in "button" one and another full-length cable, plus the prongs on the back), and also tried a different unit on the same cable this one was using. It was definitely the base unit that was the problem, so we ended up having to return it and get a new one. I can't say how common such a problem might be though, and the 3 we have now all work fine. We've had them for 4 months now, and all still show 100% battery. The temperature and humidity readings seem to be at least relatively accurate, though those aren't important to us. You can rename each sensor to help you keep track of them, and it will use that name in the alerts (like "Leak Detected - Heater"). It will also alert you if a device goes offline and stops communicating. They do support having multiple different locations/houses defined, for those of you who need to manage sensors in multiple homes. And the details of the alert show "Location, DeviceName" to help distinguish them (though if I had multiple locations, I'd probably put the address numbers before each sensor name to make it easier). They're a tad expensive for what they are (particularly the $20 cost for the leak-sensing cable add-on), especially if you wanted to go all-out and have them under every sink, behind every toilet, washing machine, dishwasher, etc. We'd need something like 20 of them to make that happen. Right now we're only using them in our unfinished basement, as we're rarely down there so would not notice a leak for quite some time. We have one that covers the HVAC and hot water heater area, and the other two are located by the main water input and hose bibs. One advantage of adding the leak-sensing cable is that you can then plug in the "button sensor" cable (the one that comes with the units) to the end of that leak-sensing cable and put it in another location if it's close enough to reach it, letting you potentially cover a larger area. I also chose to use strips of tape across the leak-sensing cable every foot or so, to hold it to the ground. Otherwise it tends to bend and kink and large parts of it may not actually be touching the ground. Overall, it does what it is supposed to do, the app is easy to use and we've seen no problems with it beyond the one DOA unit.

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!

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.

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.

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.

I ordered three of the Moen Smart Leak Detectors and only 1 worked right out of the package. The only problem with it was during set up, which was easy. At the end of the set up it wanted me to link to Alexa which I don't have. Even though there was a skip option it wasn't accepted and set up a loop that I couldn't get out of. Finally I exited the app several times to discover all was fine. Later I decided to set up the other two and put them into position. I discovered both of these had their batteries loose inside the water detector. One the posts that the battery fits between 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? If it's a robot inserting these, where is quality control? Shaking the box would alert to a problem since there is no sound when the battery is held in firmly as it should be. I tried to press the posts closer together to hold the battery correctly as it should be but the posts were too stiff to move and I was afraid of ruining it if I tried too hard to do that. On the third one, the battery posts seem to be in the correct position to hold the battery in correctly so that it will work but the battery was not held within these posts. It was sideways between the posts barely making contact. When inserted correctly between the posts it didn't activate. Since I had one that worked as it should, I knew what it should look like when the battery worked. I can only assume the battery has run down due to being partially inserted. Tomorrow when the stores open, I will go buy a new battery and see if that unit works. If not I will be returning two units for replacement due to being defective. I will update this review once I do that. I gave 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.

It was to be fully plugged in for it to work correctly. This works fantastically. I’ve accidentally dropped water on it and it automatically shut my water off. Then I have to go on the app and bypass it for 6 hours which is enough time for it to dry. I removed one from the water heater in the garage because it was having false alarms all the time and I figured it’s the high humidity levels in the garage that trigger it. I know it’s the humidity because it only happens when I leave the garage door open and humidity goes up or when it’s a very humid day.