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Honeywell RWD41 Water Defense Water Sensing Alarm

4.4 out of 5 stars 184 customer reviews
| 18 answered questions

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  • Water Sensing Cable that detects water along entire length of cable
  • Patented 4-foot cable solution extends the detection zone offered by traditional spot detectors by 3100%
  • Provides 16 times more coverage than spot detectors
  • 6 feet of Leader Cable allows alarm unit to be mounted on walls or another room
  • Low Battery Chirp Alert
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$21.98 & FREE Shipping on orders over $35. Details In Stock. Ships from and sold by Amazon.com. Gift-wrap available.

Frequently Bought Together

  • Honeywell RWD41 Water Defense Water Sensing Alarm
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  • Honeywell RWD80/T Water Defense Water Sensing Alarm Extension Cable
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  • Glentronics, Inc. BWD-HWA Basement Watchdog Water Sensor and Alarm
Total price: $56.42
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Product Description

Amazon.com

Honeywell’s RWD41 water defense water-sensing alarm offers superior protection against leaks and water damage near potential trouble spots close to plumbing around the home or office. Place it in hard-to-see areas around toilet bases; under sinks; behind dishwashers, refrigerators and laundry machines; and by water heaters and sump pumps.

At a Glance
RWD41 Water Defense
Water Sensing Alarm
At a Glance:
  • Effective way to beat the high cost of water damage
  • Water leaks occur most frequently in the kitchen, laundry room, and bathroom
  • Plug-and-play features make for easy installation
  • Low-battery chirp alert
  • Dimensions: 9.5 inches by 7.375 inches by 1.5 inches
At a Glance

Honeywell Water-Sensing Alarm

The water defense water-sensing alarm detects leaks near major appliances around the home or office.
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Features
The water-sensing cable detects dampness along its entire 4-foot length and can be easily tucked away near appliances or hidden under baseboards around carpet. A separate RWD41-compatible 8-foot extension cable (the RWD80) is available for an even more comprehensive range. The base unit (powered by a 9-volt battery, not included) can be mounted on a wall or another flat surface and comes with a 6-foot leader cable. Installation is a cinch thanks to plug-and-play features built into the system: Just add batteries, plug in the leader cable and the water-sensing cable, and mount the base unit with two-sided tape (which the securing clips also employ to hold the water-sensing cable in place). An 80-decible alert sounds when water is detected, permitting for early discovery and intervention of leaks, and can be turned off by wiping the sensor cable with a dry cloth.


Leak Detection and Protection
Water damage is the second-leading cause of home insurance claims nationwide, and 80 percent of all home water claims are caused by plumbing and major appliances. A surprisingly large amount of water can escape from the smallest of cracks--a 1/8-inch crack in a pipe can release up to 250 gallons of water a day. Insurance companies recommend the installation of water-detection systems like the RWD41 as the best protection against the potentially expensive and stressful damage caused by leaks.

About Honeywell
Honeywell is a Fortune 100 company that can trace its roots back to 1885, when inventor Albert Butz patented the furnace regulator and alarm. Today, Honeywell continues to innovate and manufacture technologies that address challenges linked to global macrotrends such as safety, security, and energy.

What's in the Box
Water sensor alarm, mounting tape, 4 feet (1.2 m) of leak-detection cable, 6 feet (1.8 m) of leader cable, and five cable-securing clips.

Honeywell Alarm CordHoneywell Alarm Packaging
The water-sensing cable alerts the base unit to sound an alarm when there’s a leak. (Click each to enlarge)

From the Manufacturer

Patented 4-foot cable solution extends the detection zone offered by traditional spot detectors by 3100%; Water Sensing Cable detects water along entire length of cable; Place the cable in spots where you do not usually observe leaks from water heaters, sump pumps, behind washing machines and dishwashers, under sinks, around toilets; 4 feet of sensing cable is included which can be expanded to 250 feet; Base unit is powered by 9 volt Battery (not included); 6 feet of Leader Cable allows alarm unit to be mounted on walls or another room; Cable is expandable up to 250 feet - the only system that can run around the entire perimeter of a room or basement; Low Battery Chirp Alert

Product Information

Technical Details

Part Number RWD41/T
Item Weight 7 ounces
Product Dimensions 1.5 x 7.5 x 7.4 inches
Item model number RWD41/T
Power Source battery-powered
Item Package Quantity 1
Batteries Included? No
Batteries Required? Yes
Warranty Description 1 Year Limited Warranty

Technical Specification

View User Manual [PDF 570kb]

Additional Information

ASIN B0049U3XE2
Customer Reviews
4.4 out of 5 stars 184 customer reviews

4.4 out of 5 stars
Best Sellers Rank #3,111 in Home Improvements (See top 100)
#2 in Home Improvement > Safety & Security > Household Sensors & Alarms > Water Detectors & Alarms
#22 in Home Improvement > Safety & Security > Home Security & Surveillance > Security Sensors
Shipping Weight 8 ounces (View shipping rates and policies)
Domestic Shipping This item is also available for shipping to select countries outside the U.S.
International Shipping This item can be shipped to select countries outside of the U.S. Learn More
Date First Available November 8, 2010

Warranty & Support

Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.

Read about our customers' top-rated security and surveillance products on our review page: Security and Surveillance

Customer Reviews

Top Customer Reviews

Verified Purchase
I had read reviews critical of the alarm volume. How correct they were. The alarm volume is much too low, and does not even come close to that of a typical smoke alarm. The concept of water-sensitive wire/rope circling the appliance (water heater, sump pump, furnace humidifier, etc.) triggering the alarm when wet, is very good--and it is quite sensitive. But hearing the alarm is another thing. I pondered keeping the system because it could be barely heard from the basement unfinished area to the finished area, especially if noise was present, but since I pass in front of it several times a day, I figured I would eventually hear it. Consequently, I may not hear the alarm when I should. Honeywell needs to greatly improve the alarm volume. I would not recommend this alarm if distances or room closures are more than one room apart.
Comment 65 of 66 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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This alarm is ridiculously easy to install. It took maybe 15 minutes (tops) to put it under a bathroom sink, including attaching the cable to the drainpipe. It may take longer to snake the cable behind a washing machine, but it's still really easy.

The cable is very sensitive, and the alarm sounds within a couple of seconds of the cable getting wet. When you dry the cable, it takes less than a second for the alarm to go silent. The alarm is LOUD - loud enough to wake you up.

Like a smoke detector, this alarm just sits there silently, doing its thing, and you never know it's working until ... well, until it works. You should probably test it once a year by wrapping a wet cloth around the cable or dunking it in a cup of water.
2 Comments 32 of 33 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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This works just as it is described! You dunk the cable in the water, the alarm pulses. You remove the cable from water, it stops!

And, if you open the plastic enclosure, it appears that their circuit design was meant to serve 2 purposes, one for the "low-end" model (the RWD41) and one for a "higher-end" model. You can see some components are not populated, 2 of which are a switch and a relay. By probing some of those points with a meter, it appears that, when water is detected the output (which is meant to drive a relay) goes high until the switch is closed. So, if you populated the parts, it would work great with an alarm panel. You would just connect the relay contacts to a N.C. loop (assuming the relay is an N.C. relay). When water is detected the alarm would beep and the contacts would open until someone comes and pushes the button to "clear" it.

Perhaps I can get some information out of honeywell on what the part numbers for these missing parts are, or just wire up a simple external circuit of my own with a relay. If anyone has done any hacking with this, please e-mail me! sfenwick at gmail dot com.
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Verified Purchase
Okay, every other review said this was too quiet. I thought, "hey, it's in my basement, but I'll hear it.It's a small house- I'll stick it on the a/c ducts so that it echos through the house..."

It went off the other day, we only heard it because someone went downstairs to get something out of the room where it lives. This is really, really, too quiet for practical use.
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Verified Purchase
The alarm physically works OK, but it is so quiet you would have to be a dog, or right next to it to hear it if it sounded.

Installation was very easy and I was going to purchase a few of these units for my house so I purchased this one to see how I liked it. I really would have expected a better alarm from Honeywell. Honeywell should build a replacement box for this unit with an alarm that is as least as loud as a smoke alarm.
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Verified Purchase
I bought this for my business. It seemed to work well, but the alarm sound was awfully soft. I don't think that it would work well at all if you wanted to put it in your basement, for example, with the idea that you would be alerted to water when you are in the living spaces on the first or second floor.
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Vine Customer Review of Free Product ( What's this? )
Currently we use spot water detectors in various areas of our home...under our kitchen sink, near our water heater and a few areas in our basement. Compared to the spot water detectors, I absolutely love the coverage area of this water detector. This unit has 4' of water detection cable which isn't a lot, but additional cable can be purchased to cover 240'...enough cable to potentially cover the perimeter of an average sized basement.

Off & on we've encountered water problems in our basement....at least 3 times when our water heater broke & a few other when there was exceptional flooding in our area. This cable would've alerted us to the problems...however, it's not loud enough to be heard upstairs. Our basement steps are located in the garage...so there's no basement door that can be left open to hear any 'basement sounds.' I've been known to put my ear to a register when I hear noises downstairs. Thankfully, we haven't had any water issues since I received this water sensor. So I put water on the cable myself, & dried the cable to stop the alarm. However to stop the alarm in a real-life situation, it might work better to disconnect the sensor/water detector cable from the unit, and if that doesn't work, you'll have to remove the battery.

Purchasing extension cable will make this unit more useful. Honeywell RWD80/T Water Defense Water Sensing Alarm Extension Cable

This sensor is easy to set-up and install. Double stick tape is included to mount the alarm unit on a dry wall & there's 6' of leader connection cable (we can mount the alarm close to the basement ceiling & possibly better hear the alarm in our living area.
Read more ›
4 Comments 11 of 12 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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Honeywell RWD41 Water Defense Water Sensing Alarm
This item: Honeywell RWD41 Water Defense Water Sensing Alarm
Price: $21.98
Ships from and sold by Amazon.com

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