Resideo RWD21 Reusable Water Leak Alarm

This has already saved me from a huge basement flood. 12" of rain in only an hour! Yeah, it was a nutty day. My main sump pump could not keep up. This gave the alarm and I sprung into action setting up additional transfer pumps to get it outside. I still got water, but it never covered the entire floor. IT could have been a complete disaster.It will detect even the slightest water and is loud. Make sure to put it on a flat portion of the basement floor and consider the path where the water will flow so that you can catch it as early as possible. Mine is sitting right next to my sump hole. Also beware that if you have cats, they might play with it and move it. Check the batteries often. So far batteries are lasting about 6 months for me.The downside is that in many cases, if this alarm works, and the water is flowing in quickly enough, it's going to make a mess either way, because you won't be able to address it quickly enough. However, it could help prevent a MAJOR flood. Have a plan! Back up power and additional pump on standby. I have a generator and even a coiled up extension and AC inverter hanging on the wall in case I need to use my truck for power!

We had a mysterious leak in the bathroom in our basement. It ruined the carpet in the basement. To discover the issue, we called a plumber out, but the issue was not anything "normal" that could be found. And rather than spending the large amount of money to send a camera through the pipes and snaking - and perhaps still not finding anything, the plumber suggested we consider getting one of these leak detectors. So we opted for that. And man, am I glad we did. Twice since the mystery leak, I heard the detector alert. Once it was just something small, but the other time, it was a full-on leak in the bathroom again. I heard the alarm and made there just in time to throw a towel in front of the rising tide of water to stop it from getting into the hallway and ruining the carpet again. This little guy paid for himself 1000 times over!Pros:ReliableEasy to useInexpensiveReusableEasy to testCon:The ONLY negative I would say on these is that, although the alert sound is loud, it is not loud enough for someone to hear on the floor above while taking a shower (which is when this occurs at our house). But this is not the fault of the detector, just be aware if that is what you might need, consider something tied to alarm system or maybe wifi alerting or something. I cannot ding a star off for this though, considering the $$$$ this device has saved me.

Water pipe from outdoor faucet broke inside the house near the internal pipe valve sometime during the winter. When the hose was attached and water turned on this spring, it came through the split pipe and rained inside the house, down basement wall and onto on the basement floor, drywall, carpet and trim. The alarm detected the leak immediately and was loud enough to hear on the second floor, allowing us to quickly turn off the water - saving us from a more extensive repair bill. Will buy additional units and consider others with smart home connectivity to alert our phones in the future.

We had a leak in our upstairs bathroom and did not know about it for days. This alarm could have notified us of the problem, had we had it. Now, every water source (sink, washer, sump pump, bathroon, etc.) in our house has an alarm located near or under it. They work beautifully. I strongly recommen having an alarm, it could save you thousands should you have a leak.

The product is great, just what you would expect from Honeywell. Small, simple, and with a low battery warning like a smoke detector. Eventually we should probably all upgrade to detectors that alert us on our smartphones, but I plan to wait on that till the bugs are all worked out, and these are cheaper also. I bought 5 and all test out ok, so I hope they work properly if there is a leak. The alarm isn't super loud but is fine for me. Having it in the cabinet under the kitchen sink, with the cabinet doors closed, I can hear it all the way up in the bedroom on the second floor, with the bedroom door also closed. If you are playing a stereo or watching TV it would of course be harder to hear.The packaging is 1 star in my view because of the overly thick plastic you have to cut through to get at the product, and then the 5 minutes or so of time you will spend if you want to get all the double stick tape goo off the bottom of the unit. Have your Goo Gone ready! This is not a big deal of course, and doesn't affect my rating.Some people wrote it wobbles on the base. That only happens if you don't screw the base in all the way. It is easy to screw in all the way if you use a quarter in the slot to turn the base cover. I wonder if this was the issue for some other reviewers that stated it didn't go off at all or the alarm was delayed, since not screwing the base in all the way moves the electrodes up off the floor. This could be a significant distance off the floor if the unit also rocks on the base such that the electrodes are even higher. But there is no issue here if you screw the base in properly.One final note is I agree the wires for the battery attachment are a bit short, but if you are careful there shouldn't be an issue.