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Model # RWD41

Internet # 202491357

Store SKU # 1001251708

WaterDefense Water Leak Detection Alarm

This item has been discontinued.
The Home Depot no longer carries this specific product.

$20.21 /each




Model # RWD41

Internet # 202491357

Store SKU # 1001251708

Water escape damage is the 2nd leading cause of home insurance claims nationwide. Be alerted of water leaks in your home with Honeywell's Water Detection Alarm. The Water Detection Alarm's entire cable senses water - it is ideal for use around water heaters, sump pumps, under sinks, behind refrigerators and under dishwashers.

  • 16 times more coverage than a spot detector
  • Effective - it has a loud alarm (80 decibels) and can detect the slightest amount of moisture
  • 4 ft. leak detection cable
  • 6 ft. of leader cable allows alarm unit to be mounted on walls or in another room
  • Cable is expandable up to 240 ft. - the only system that can run around the entire perimeter of a room or basement

Info & Guides

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Product Depth (in.) 
Product Height (in.) 
Product Width (in.) 
2.75 in 
Finish Family 
Product Type 
Water Alarms 
Product Weight (lb.) 
.4 lb 
Warranty / Certifications
Manufacturer Warranty 
1 year limited warranty 


Rated 4.4 out of 5 by 29 reviewers.
Rated 5.0 out of 5.0 by No More Hidden Mold After having a "secret" leak under our water heater upstairs for over 5 years that no plumber could ever find and our ceiling dowstairs even caved in once we finally fixed the leak using a FLIR camera. To prevent future hidden leaks put one of these things by water heater and by washing machines to make sure we aren't caught off guard by hard to see slow leaks that cause mold to grow. Like a smoke detector but for water. So far so good! March 5, 2013
Rated 4.0 out of 5.0 by Works as advertised I bought this product to monitor moisture under the air handler of my AC system. It has already saved me from a leak that I was able to stop immediately. July 21, 2015
Rated 5.0 out of 5.0 by A simple way to protect your ceilings This is a simple alarm system that lets you know if your air conditioner(s) or water heater have failed to drain properly. When water is detected where it shouldn't be, you are warned immediately, so you can take the proper precautions (shutting the air conditioner off or turning the water off to the water heater before serious damage is done.) July 21, 2015
Rated 5.0 out of 5.0 by It worked! I installed this thing about 6 months ago because we had an 11 year old hot water heater in the attic. The alarm went off a couple days ago - for some reason I thought it may be the battery. Sure enough, we had a leak in our hot water heater and the pan had some water. My $25 investment may have saved a great deal of money and ceiling drywall replacement (ie: headache). It works! September 30, 2014
Rated 2.0 out of 5.0 by Not loud enough Having a cable sensor that can monitor a large area for leaks is great but the low volume makes this device almost useless. If you install it and then close the utility room door or a cabinet door and go around one corner or up one flight of stairs you can't hear it. Other water alarms are 90 or 100db This one is 80db. I want to be able to hear it while I'm in the living room, kitchen or master bedroom so I know about a leak as soon as possible to limit the damage. I suspect Honeywell chose the 80db alarm so it would use less power and sound for a longer period of time. I suggest they use a louder alarm and have 2 batteries. I'm going to snake wires through my walls and install the alarm box on the main floor of the house with the sensor cable in the downstairs utility room. Fortunately they use telephone cable and RJ11 connectors that will make an extension possible. If you do this note that they are using the two outside positions on the RJ11 connectors January 19, 2015
Rated 4.0 out of 5.0 by Almost perfect After 3 floods, shocked to come across this. It's a must as my water heater is in the storage room that's part of my house & backs up to my living room & laundry/kitchen. Last flood, 2 years ago raised insurance $500. Never again I pray. So easy to put up, only 4 stars because it's not loud enough. It's at one end of the house when I stay in the middle w/the tv going. I'll most likely get 2 more to add to it. It would get 10 stars if it could be programed into a cell phone. If no one is home to hear it, it's of no use. Unless you get home before the flood is too bad. They need to make it larger, to hold several batteries, whatever will make it a real ALARM but I'm grateful to have it. I'm always home & water heaters aren't made like they used to be. If I only had a garage for the water heater. I recommend it, you may be home when it bursts. If you house is like mine, get 3 & don't forget to change the batteries April 9, 2013
Rated 5.0 out of 5.0 by Easy Protection I installed this under a new refrigerator. Hopefully (!) it will warn of impending doom for the all too expensive hardwood floor. I like the cord implementation for the moisture sensor, it allows for a much greater area and increases the chance of proper surface contact to alarm for water. The connection cord is 6' so the alarm can set out of sight on top of the refrigerator. I tested the device before installation and was impressed with the cord's ability to detect water and the voice of the alarm. Recommended! August 14, 2012
Rated 5.0 out of 5.0 by No more leaking water heater damage. Very easy to install. No need to buy the extension cable from HONEYWELL. A regular phone cable also works. I tried out the product by running the water sensitive cable under a faucet. Nice loud alarm. I do not want another nasty surprise with a slow leaking water heater unnoticed until mold was growing! May 19, 2015
  • 2015-11-29 T09:32:00.980-06:00
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