Honeywell WaterDefense Water Leak Detection Alarm-RWD41 - The Home Depot


Model # RWD41

Internet # 202491357

WaterDefense Water Leak Detection Alarm

Honeywell WaterDefense Water Leak Detection Alarm

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

$21.98 / each


Model # RWD41

Internet # 202491357

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


Assembled Depth (in.)  2.5 in  Assembled Height (in.)  3.5 in 
Assembled Width (in.)  2.75 in  Product Depth (in.)  1.25 
Product Height (in.)  3.5  Product Width (in.)  2.75 in 
Finish Family  White  Material  Plastic 
Product Type  Water Alarms  Product Weight (lb.)  .4 lb 
Returnable  90-Day 
Warranty / Certifications
Manufacturer Warranty  1 year limited warranty 


Rated 4.4 out of 5 by 26 reviewers.
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 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 5.0 out of 5.0 by Water Detector Easy to instali. I hope I never hear the alarm but there is comfort in knowing if my hot water springs a leak, I will know about it. April 24, 2015
Rated 5.0 out of 5.0 by It Works! Very simple to install where monitoring for water leaks is needed (hot water tanks, under dish washers). The only improvement I would suggest is a louder alarm. When the unit is behind a closed door, the alarm may not be loud enough. April 14, 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 4.0 out of 5.0 by Extension cable is great! Three main pieces: the unit; a telephone line cord extension; and the sensor cable. The unit itself seems durable. It was easy to put the battery in. It came with some self-stick double sided tape, but depending on where you put it, may make it difficult to change batteries. I opted to buy some self-stick velcro & thus can pull unit on and off the inside cabinet wall easily. The extra length phone line makes this possible. I'm using mine under our dishwasher where we had a leak. With dishwasher removed, I was able to snake the sensor cable in an S-shape beneath the dishwasher, fasten the phone line extender cable to it, thread the phone line through a hole in the cabinet, and mount the unit under the sink. Worked perfectly. I tested the unit by putting a few drops of water on the floor. When the sensor cable touched them, the unit went off. The degree of loudness is fine. It may not wake some people up in the middle of the night, particularly if they're in another room. But if you're in or near the room & awake, you should hear it fine. It's NOT as loud as our smoke alarms. The only complaint is that there are little 'stick on' clamps that are supposed to hold the sensor cable to lie flat on the floor. A) there are not enough of them (5), and B) they didn't stick so well; two came up when sliding the dishwasher back into place. I had to use tape to help hold it down. I'll buy another because this is the only model I've seen that has a cable sensitive over its entire length. Most I see simply have a sensor on the end and doesn't lay flat but would require some depth to the water, such as a sump. March 10, 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 Excellent Product Honeywell has a reputation for producing excellent, high-quality products. This water leak detector is no exception. It exceeded my expectations. It is extremely sensitive. When I tested it, one drop of water on my finger set it off. November 17, 2014
  • 2015-04-27T10:13:23.955-05:00
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