---
product_id: 3582736
title: "Resideo RWD21 Reusable Water Leak Alarm,White"
brand: "honeywell"
price: "VT447"
currency: VUV
in_stock: false
url: https://www.desertcart.vu/products/3582736-resideo-rwd21-reusable-water-leak-alarm-white
store_origin: VU
region: Vanuatu
---

# Detects water as shallow as 1/16" 85dB loud audible alarm Unlimited reusable spot detector Resideo RWD21 Reusable Water Leak Alarm,White

**Brand:** honeywell
**Price:** VT447
**Availability:** ❌ Out of Stock

## Summary

> 💧 Stay dry, stay ahead — never let a leak catch you off guard!

## Quick Answers

- **What is this?** Resideo RWD21 Reusable Water Leak Alarm,White by honeywell
- **How much does it cost?** VT447 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/3582736-resideo-rwd21-reusable-water-leak-alarm-white)

## Best For

- honeywell enthusiasts

## Why This Product

- Trusted honeywell brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Loud & Clear Alarm:** 85-decibel siren ensures you never miss a leak warning, even in busy homes or offices.
- • **Versatile Placement:** Perfect for hidden risk zones like under sinks, behind appliances, sump pumps, and more.
- • **Eco-Friendly Reusability:** Reset and reuse endlessly—no need to replace after every alert, saving money and waste.
- • **Peace of Mind Protection:** Economical, easy-to-install defense that guards your home from costly water damage disasters.
- • **Precision Leak Detection:** Sensitive to water just 1/16" deep for early alerts before damage strikes.

## Overview

The Resideo RWD21 is a compact, reusable water leak alarm that detects water as shallow as 1/16 inch and triggers a loud 85dB audible alert. Designed for versatile placement in hidden or vulnerable areas, it offers an economical and eco-friendly solution to prevent costly water damage. Powered by a 9V alkaline battery (sold separately), this easy-to-use device provides continuous peace of mind with a resettable sensor and alarm all-in-one.

## Description

Product Description               Easy to use - set in lowest spot where water leak may occur. Detects water 1/16" deep. Ideal for use in areas not usually observed: Water Heaters - Behind Washing Machines or Dishwashers - Under Refrigerator for Ice Makers - Under Sinks - Sump Pumps of inside pits - Toilets - Behind or near media systems. Provides early warning of potentially costly water damage.                  .com                 Re-Useable Water Leak Alarm — RWD21 • Sensor and alarm all-in-one • Loud audible alarm • Economical way to defend against water leaksNever be surprised by a leak or flood again! The Honeywell RWD21 Single Use Water Leak Alarm automatically goes off when water comes into contact with it allowing you to respond to leaks and floods quickly and prevent disastrous damage caused by unknown water exposure. Great for placing around water prone areas such as sump pumps, water tanks, burst prone pipes, or even under the sink. Honeywell's water defense system and water-sensing alarm offers superior protection against leaks and water damage in your home and office. Add peace of mind with a water leak alarm.Features:Unlimited use spot detector; easily re-sets for re-useEasy to use near water heaters, sump pumps, under sinks, dishwashwersWater sensor and alarm all in oneEconomical way to defend against water leaks in multiple locations throughout the homeLoud audible alarmAlarm sounds for up to 24 hours (dependent upon battery life)Low battery chirpRequires 9V battery (sold separately)               
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                    From the Manufacturer               Easy to use - set in lowest spot where water leak may occur. Detects water 1/16" deep. Ideal for use in areas not usually observed: Water Heaters - Behind Washing Machines or Dishwashers - Under Refrigerator for Ice Makers - Under Sinks - Sump Pumps of inside pits - Toilets - Behind or near media systems. Provides early warning of potentially costly water damage.             See more

## Features

- Unlimited use spot detector
- Economical way to defend against water leaks in multiple locations throughout the home
- Water sensor and alarm in one
- Audible alert when water is detected
- Detects water only 1/16" deep

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Battery Description | Alkaline |
| Number of Batteries | 1 9V batteries required. |
| Voltage | 9 Volts |
| Control Method | Remote |
| Noise Level | 85 Decibels |
| Mounting Type | Wall Mount |
| Sensor Technology | Contact Sensor |
| UPC | 712411960599 085267769792 716080041368 |
| Global Trade Identification Number | 00085267769792 |
| Manufacturer | Honeywell Home |
| Part Number | RWD21/A |
| Item Weight | 3.2 ounces |
| Product Dimensions | 5.5 x 1.38 x 7.25 inches |
| Item model number | RWD21 |
| Batteries | 1 9V batteries required. |
| Is Discontinued By Manufacturer | No |
| Material | Plastic |
| Shape | Circular |
| Installation Method | Free Standing |
| Item Package Quantity | 1 |
| Usage | Inside |
| Included Components | Water Leak Alarm |
| Batteries Included? | No |
| Batteries Required? | Yes |
| Battery Cell Type | Alkaline |
| Description Pile | Alkaline |
| Average Battery Life | 2 	years |
| Warranty Description | 1 Year |

## Product Details

- **Color:** White
- **Brand:** Honeywell
- **Power Source:** Battery Powered
- **Compatible Devices:** Devices with 9V battery compatibility
- **Product Dimensions:** 3.25"L x 3.25"W x 1.13"H

## Images

![Resideo RWD21 Reusable Water Leak Alarm,White - Image 1](https://m.media-amazon.com/images/I/511zSMtp6hL.jpg)
![Resideo RWD21 Reusable Water Leak Alarm,White - Image 2](https://m.media-amazon.com/images/I/61DjHIqfXoL.jpg)
![Resideo RWD21 Reusable Water Leak Alarm,White - Image 3](https://m.media-amazon.com/images/I/614ZrO8sc4L.jpg)
![Resideo RWD21 Reusable Water Leak Alarm,White - Image 4](https://m.media-amazon.com/images/I/41HVczJvhoL.jpg)
![Resideo RWD21 Reusable Water Leak Alarm,White - Image 5](https://m.media-amazon.com/images/I/81RAJdWtieL.jpg)

## Questions & Answers

**Q: Does it float?**
A: They all float Georgie. And when you're down here, you'll float too

**Q: Is the battery replaceable ? If yes, what size battery does it require ?**
A: Hi - Yes, the battery is replaceable.  It's a 9-volt battery.  But in my opinion, the Zircon Leak Alert alarm is better than the Honeywell.  The Zircon has sensors that lie flat on the floor, as opposed to the Honeywell, which has sensors that are raised slightly above the floor.  In fact, I tested the 2 alarms side-by-side and found that the Zircon's response time is faster than Honeywell's.  (The Zircon also uses a 9-volt battery).

**Q: Is it water proof?  Meaning if it is submerged in several inches of water can it be reused?**
A: I'm not sure if that would ruin it or not. I didn't submerge mine, just set it in shallow water to make sure it would beep.

**Q: How long battery last?**
A: The Honeywell Home RWD21 Water Leak Alarm requires a 9-volt battery and has a standby current of 5 to 10 uA. The alarm sounds for up to 24 hours (dependent upon battery life) when water is detected. Hope this helps!

## Frequently Bought Together

- Resideo RWD21 Reusable Water Leak Alarm
- Amazon Basics 8-Pack 9V Alkaline Batteries, 5-Year Shelf Life - for Smoke/CO Detector, Electronics & Audio
- Amazon Basics 2-Pack 9 Volt High-Performance Lithium Batteries, 10-Year Shelf Life, Long Lasting Power

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**Shop now:** [https://www.desertcart.vu/products/3582736-resideo-rwd21-reusable-water-leak-alarm-white](https://www.desertcart.vu/products/3582736-resideo-rwd21-reusable-water-leak-alarm-white)

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*Product available on Desertcart Vanuatu*
*Store origin: VU*
*Last updated: 2026-05-17*