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

This alarm works perfectly at detecting water. A few caveats: As people mentioned, the pairing and Wi-Fi setup steps are missing from provided setup instructions, however, within minutes I located a short YouTube video that quickly filled in the blanks, and once you do this, it takes a few minutes to connect. Second caveat is that the provided alarm is very quiet. Your smartphone has louder ring options. So, you really need to rely upon the iPhone notification alerts to have a clue that it is going off, unless you are sleeping right next to your sump pump or wherever. I rigged mine to hang into a basement drain with the sensor on cord. Works. My sump failed, and I would never have known since I don’t go into basement daily and check, and dehumidifier regularly drains to this pump. I got a notification on iPhone from the Flo app while away from home, and checked sump upon return to determine sump had failed, but water was still in drain, so no overflow. I caught it early enough to minimize cleanup. It’s just a little, relatively cheap device, but it works.

Wow, these things are complete junk. About nine months ago, I bought eight of them to use on various faucets and other locations. Two were bad out of the box, and I never could get them to connect. I should have returned them but never bothered (for reasons that were entirely my own fault.) The app is required to connect them when first setting them up, but the UI for that is klunky. I set things up so that I would get both an alert on my phone and an email if there was a problem, and then I tested them by putting them in a bit of water. The alerts worked. So far, so good. The alarm noise was not very loud, but I was going to rely on the alerts on my phone and the emails. Then the "Device Offline" alerts started. Just one device every week or so. "On September 9 at 10:31 am, your Smart Leak Detector went offline. This could be due to a battery or internet outage." It would be offline for minutes or hours and then it would come back online. One alert for off, one alert for on. Gradually, over time, the alerts escalated. The day before yesterday, I got more than twenty alerts from all six remaining devices. Yesterday, I replaced all the batteries (not cheap), thinking fresh batteries would solve the problem. It didn't. And now, I will start researching other brands that will only send me an alert when there's actually a problem.

Bought this after my basement flooded. Eventually I plan on getting the Moen flo smart water flow monitor which will pair wonderfully with this. I like how it shows temperature and humidity on the location where you set it up. Battery life is wonderful. App setup is a breeze and the app itself is nice. The ability for it to email, text, call and all the things is amazing. Its quite sensitive which is a good/bad thing. I have my water softener draining into my sump and it can splash at times and so i had to adjust my sensors location until it would quit getting splashed and going off.

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'.

The first one I purchased wouldn’t turn on at all. It is possible that the battery was dead as the little tab was not between the battery and the connectors inside the unit. I wasn’t going to go buy a battery to find out. So, I returned it and requested a replacement. The replacement came today. Again, the tab keeping the battery away from the connections was not in. It did turn on, and I was able to connect it to my app. Unfortunately, once I plugged in the sensors, all kinds of alarms went off, and it turned off the water in my house because it was synced with my flo turn off device. Even though the sensor was completely dry and on the counter, it said there was a critical leak. So, I deleted the device from my app and started it over. Went through the whole process and ended up with the same critical alarm. I was smart enough the second time around not to sync it to my water shut off so all I got was the alarm. BTW, the battery shows only 59%, so it’s been either on or is used. Anyway, I like my Flo Mo water shut off device but basically think this micro leak detector is worthless.

I have water sensors at 3 properties, a mix of brands. Once you get the Moen ones set up and working, they are generally good, but the setup process is horrific, and if I need to add another one somewhere, I literally dread doing it. They rarely pair correctly, need to be reset multiple times during the process, and the new Moen app (which they are pushing you to transfer to from Flo) is somehow even worse than the original Flo app. They get 2 stars because they have humidity and temperature integrated, but it is just not worth the trouble anymore. I have started using the Tapo ones with hub instead because the setup could not be any easier, and the Tapo sensors have a water sensor on the top (the Moen do not). The Tapo ones don't have temperature / humidity, but you can also get those sensors from Tapo too, and the Tapo water + temp sensor combo is still cheaper than one Moen device. And saves tons of headaches.

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.

Every home should have these. You put them wherever you could have a water leak. We have ours by our sump pump. I had a friend whose water hose that went to their washer leaked and flooded their home. One of these would have alerted them via the software application downloaded to your phone. They are good near toilets, sinks, basement doors, whatever you think you could have water. They give you peace of mind. These are excellent for leak detection. Moen is a leader in the industry and they standby all their products. You get what you pay for and these are worth every penny. The setup with the app was not the best trying to link the product, but I figured it out through sheer determination. This needs some attention from Moen.

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.

I purchased 4 of these devices: The first 2 paired without issue and appear to be working fine. The battery on the first one died within a few days, and the 2nd one lasted about 2 weeks before dying. These use CRA123 batteries which do not come cheap. I was never able to pair the 3rd one, no matter what I tried; it always failed once I connected to the wifi network. I tried adding the network manually, I tried resetting the router, I tried changing the AP name, I tried manually connecting to the network, every single attempt failed, and customer service is of absolutely no use. The 4th one paired, and despite having a brand new battery (not the one provided) it reported the battery at 43%. I took out the battery, and the app never informed me that the device was offline, I even waited 20 minutes to see, and still nothing, it was reporting the same 43% battery level and offline. Bottom line: I would not trust these things to alert me in case of a water leak. Given the cost of each device, I would have expected it work flawlessly, but I'll be returning them and going with either Honeywell or pretty much any other brand. If your devices all appear to be working, I highly recommend doing a test to see if they are reporting correctly, dip the sensor in water, try taking out the battery, and see if the app reports it.

Doesn’t work, I tried to returned but need to send to USA and costs a lot. Not compatible with app

No instructions re setting up in box. Finally got it working after search youtube. Stopped working when wifi ( as a result of nbn outage) and haven’t been about to get it going since. Assuming battery supplied was depleted and can’t make any further suggestions until I purchase a battery - not a common one you have around the house so buy a few for future replacement

Good product. One item to pay attention is that during shipping the sealing tab of the battery moved and when I tried to start up the unit, battery was empty. I had to purchase two batteries for 24 CAD, which is a sizeable chunk of the investment in the sensor. It was not worth for me (so one battery that is needed is 12CAD) to return the unit, just wanted people to be aware.