15 Best Water Detectors & Flood Alarms for 2022

A water alarm is one of the most effective ways you can protect yourself and your family from water damage. A water alarm gives you the ability to detect leaks, both slow and fast, before they become a serious problem.

Water alarms can sense water leaks of all sizes, from leaking pipes to roof leaks. They’re also designed to pick up plumbing leaks from toilets, sinks and washing machines. If you have a pipe that’s been slowly dripping water for days or weeks on end, you may not even notice a drop in your water bill because of the slow leak. It’s only when the pipe bursts and water begins flowing out rapidly that the problem becomes obvious.

What are the Flood Alarms Used for?

A flood alarm detects water leaks and overflows in places where such a situation could go unnoticed for a period of time, so action can be taken early to prevent further damage to the property.

It can be used anywhere where there is a risk of flooding, or water is predominantly present. Such places include wet rooms with water heaters, bathtubs, washing machines, sump pumps, toilets, dishwashers, and water pipes.

Do Water Leak Detectors Actually Work?

Yes, they do and very well indeed. The fact is that each year, the damage to homes and businesses caused by leaks and burst pipes is more than $10 billion. If you’re fortunate, your insurance company will foot the bill for your personal losses, but if not, faulty plumbing might cost you dearly when disaster hits. Furthermore, leaks result in massive water losses that have a negative impact on both the environment and the cost of water in your house.

Newer technologies can detect problems before they become a costly disaster by detecting small leaks long before they break through a ceiling or flooring. These leak detection devices work by sending out a radio signal that bounces off a water source and bounces back to a receiver. This will indicate if there is a leak in the vicinity of the transmitter. They are easy to install and have low maintenance costs.

How Do Flood Alarms Work?

A water alarm is designed to detect moisture in your home or office. It works by sending an electrical current throughout the wires and probes of the device. When moisture enters these wires, it interrupts this current and starts up another electrical circuit which causes an alarm to sound off so that you know that there is a problem.

Active or Passive Flood Alarms- Which Ones are Better?

Flood alarms come in 2 types, active and passive alarms.

Active alarms are integrated into the water system itself such as water pipes and water pumps. When the sensor is triggered, not only does the signal activate a sound, but it also shuts off the water supply to the water system.

Passive alarms, on the other hand, are placed close to appliances, equipment, or in certain areas of the house that have a higher risk of flooding. They contain flooding sensors which are sensitive to water contact. Once the sensors get wet, a signal is sent to the alarm system which emits the alarm sound.

The downside to this type of alarm is that you will have to manually close the water system, and turn off the alarm yourself. Many passive alarms run on a battery which needs to be checked regularly for them to be functional at all times.

Why Do You Need a Water Alarm

Leaks occur in a variety of ways. Some are simple and easy to fix, while others can be quite difficult. The problem is that many homeowners find small leaks too inconvenient to fix, but the longer the leak goes undetected, the more likely it is that major water damage will occur. If you have furniture or equipment stored in basements or warehouses, you could lose all your possessions in just one flood.

There are several reasons why flooding can occur. The most common occurrences are:

  • A faulty plumbing system that allows water to leak from the pipes or from the faucet. Showers and toilets are common sources of such leakage.
  • Heavy rainfall, flash floods, or typhoons that result in overflowing sewers and drains.
  • Overflowing bathtubs that are not properly covered with stoppers or shower curtains.
  • Leaking roofing material such as shingles, gutters, downspouts, flashing etc., which is often the cause of basement flooding.
  • Overflowing water heaters or broken pipes in a water heater that causes the water supply to stop.
  • Flooding from burst water mains or broken pipes.
  • But flood alarms can also be set off when you are not in a flood zone for a few reasons:
  • Mud, dirt, and debris in storm drains or sewers that clog up the cleaning systems, causing flooding.
  • Hail storm damage can cause flooding.
  • Unintentional activities causes by dementia or other causes, when people forget that they left water running etc.

The best way to avoid or minimize damage from a leak, is to prevent it from happening in the first place. By using a water alarm you can detect any leaks as soon as they occur and prevent damage from occurring before it’s too late. Luckily, there are many options available for those seeking this level of protection.

What to Look for in a Water Alarm

Buying water alarms is an important decision. It is essential that you consider the different features of each product so that you can get the most value for your money. Here are some vital features you should consider when deciding on purchasing a water alarm system:

Size of Area That Is to Be Protected

It is important that you get a water alarm system with the appropriate sensor probes and wiring that will cover the entire area that you want to protect from a possible flood or leak. The size of your property will help determine how many sensors and wires you need. It is a good idea to purchase extra wires and sensors for areas that are remote from the main terminals.

Range of Sensor Probes

While some water alarm systems have an advertised range of up to about 800 feet for the sensor probes, this may not always be the case when you buy them. You may need to test these systems before purchasing them so that they will work properly in your home or office. This will help you make sure that the system always detects moisture in the area where it is needed most.

Quiet Operation

Some water alarm systems may be too noisy for you because of the way they operate. When they detect moisture, they sound off loudly so that you can hear them, but this may be too disruptive for some people. You will want to consider this when purchasing this type of product so that it meets your needs without causing any problems or inconveniences in the future.

Maintenance Requirements

You may need to regularly test your water alarm system or replace the sensor probes before you can use it for the first time. This may be an annoyance to some people, but it will help ensure that you will always have a reliable system in place, that can detect moisture in your property.

Best Water Detectors & Flood Alarms

Water detectors and flood alarms are essential for homeowners who live in an area where flooding is a concern. These devices not only warn homeowners of the impending danger, but can also detect leaks and floods through sensors that have been strategically placed in the building.

To help you navigate this confusing marketplace of flood alarms, we’ve compiled a list of our favorite 15 best water detectors and flood alarms. We reviewed these products based on the features they offer, as well as how affordable they are.

1. MOEN 920-004 FLO Smart Water Detector

The Moen 920-004 FLO, a smart sensor, detects leaks before they become a problem and sends instant alerts to notify you of any issues. With this device, you always know what is going on in your house and you can use the app to control this from your phone. Stay dry with the never-fog lenses that work without power.

They also measure the temperature and humidity inside your home for 24/7 protection against leaks. It is easy to install and can be used to connect multiple detectors. The snap-on wall mounting bracket lets you install it on your wall for a convenient location. The remote sensing disc can extend up to 48 inches, meaning it covers an entire room.

You can set alerts with this Sensor that sends real-time alerts before the problem becomes worse. When there is a leak, the detector will sense excess moisture and send an alert directly to your smartphone. The app will then provide real-time monitoring.

The Moen Smart Detector is designed to be used in conjunction with possible faulty pipes. The system is made of two parts: the detector and the remote sensing disc which hangs in your ceiling. While the remote sensing disc can stretch up to 48 inches, you must be sure that it covers the entire area where a leak may occur. If it doesn’t, you can use more than one disc (one per room) for larger areas.

2. TOPVICO HH-LS618 Water Leak Alarm Sensor Detector

The TOPVICO HH-LS618 uses ultrasonic technology to detect even the tiniest movements. This water leak alarm sensor can be stuck anywhere. But fear not if your schedule means that it isn’t always in reach – the 110dB loud alarm voice ensures that when it detects water seeping through, you will hear it.

For those worried about installation, rest assured – just stick it to a wall or ceiling, and let it do its thing. In fact, you can use multiple units at once. The LED indicator will let you know when your batteries are running low as well, so no need to worry about replacing them. It’s incredibly easy to install – but even easier to use!

The sensor is ideal for homes with small children or pets, too. After all, what could be better than knowing that your loved ones aren’t in any danger of getting wet? Of course, it isn’t just for home use. Whether you live in an area that often suffers from flooding, or just want to guarantee that your basement stays dry, this water leak alarm sensor will be your savior.

Finally, the TOPVICO HH-LS618 is designed to last for years. It can withstand not only water but dust as well.

3. FLUME 2 Smart Home Water Monitor & Water Leak Detector

FLUME 2 is a smart water detector that uses state-of-the-art sensor technology to detect water leaks with accuracy and notifies users via an app. The FLUME 2 wireless water detector is designed to seamlessly integrate with other smart home devices, providing user notifications in real time. Some of the features include:

  • It does not require any pipe cutting or plumbing installation, simply plug it into an existing electrical outlet.
  • The app follows your consumption habits and provides suggestions on how to save money while also saving the environment, by conserving water.
  • This water detector also keeps track of outdoor and indoor water usage.
  • It allows users to manually set custom alerts and notifications, ensuring that you are immediately notified if any leakage is detected.
  • The sensor is able to detect leaks either above or below the flooring surface, providing users with protection against leaks of their most valuable asset – water.

The FLUEM WATER App – A smart home app that raises awareness of your household’s daily consumption habits, monitors water use with intelligent automation capabilities, notifies users of detected leaks via push notifications, and offers leak assistance for emergencies.

4. TOPVICO Water Leak Sensor Detector

TOPVICO’s Water Leak Sensor is a highly sensitive detection board perfect for detecting water leaks. It comes with a 120dB loud alarm, is a small size, easy to install, 37.8” cable length, battery-operated and has 6-12 months battery life.

The sensor detects water leaks and helps you to discover them quickly and avoid potential hazards like structural damage. Moreover, it provides an excellent way of saving you money.

The Water Leak Sensor requires no special skills or professional help. You can easily put it up on walls or ceilings.

Each Water Leak Sensor is equipped with an individual device address so that multiple Water Leak Sensors can be installed at the same time. These devices come with a 6-12 month battery life span which you can rely on from day one.

5. GOVEE WiFi Water Sensor

GOVEE is a connected water sensor that provides real-time alerts in your home. It also has a companion app that sends notifications to your phone, as well as an integrated web portal for remote access to your home. This product is compatible with multiple sensors and each are completely sealed.

The sensor has a noise alarm at 100dB, which can be turned down or silenced by pressing the mute button on the top of the sensor. In addition, it’s equipped with a back-probe and front-probe function for leak detection. This product connects to WiFi via 2.4G WiFi depending on what type of device you’re using and can connect multiple sensors simultaneously without any issues.

In addition, the app is easy to use and works reliably. Each of the sensors can be grouped together so they all share the same settings including alarm, filters, and water rules. In addition, each device has a view mode that allows you to see exactly how much water it has detected or what level your reservoir is at.

You can also add filters for specific types of quantities such as a low-level setting for when your reservoir gets too low. In addition, if a sensor ever goes offline, you’re notified immediately via push notification from the app. Set-up is painless and only takes a few minutes to get up and running. The app takes you through the entire setup process.

6. SHACKCOM Basement Water Leak Detector Alarm

SHACKCOM is a water leak detector alarm and flood sensor. It can be used on the floor without any wiring. Features include:

  • It has high sensitivity to detect leakage or flooding at a 120-degree angle with two sensors at the bottom of the device, which makes it more sensitive than other water leak detectors on the market.
  • When a leakage or flooding occurs, a loud 110dB alarm will be emitted and a flashing light will turn on.
  • The sensor is fully automatic and no wiring or maintenance is required.
  •  All you need to do is install your device on the floor or anywhere you think there may be leakages in your home such as the basement, near a washing machine, water heater, etc.
  • It turns on automatically when any leakage is detected.
  • The sensor has a dismountable design which makes it easy to install.
  • It is made of high-quality material.
  • SHACKCOM is lightweight, has good applicability and high sensitivity.
  • It is very convenient and practical for everyone to use.

7. GEENI WiFi Water Leak Sensor and Alarm

GEENI is a revolutionary system that wirelessly notifies you of water leaks and sends alerts to your phone. This system saves time and money by alerting you to a potentially costly problem before it gets worse, and lets you know if there’s an unsafe situation developing. It comes with everything you need to set up for leak detection.

Easy installation steps can be found on the back of the pack. Peel the adhesive strips and stick them onto cabinets, pipes, or just about any place you may have a leak. It can be used to detect water leaks in bathrooms, kitchens, washrooms, basements and a variety of other places.

GEENI is water-resistant and waterproof so it can be installed in areas with hard-to-reach places such as behind sinks or toilets. It’s also perfect for detecting water leaks in washing machines, hot water tanks and anywhere else with a drip or leak. The system will notify you when a leak is detected. Once the sensor detects water, it sends you an alert via email, text message or push notification.

8. GRSICO Water Sensor Alarm

The GRSICO water sensor alarm detector pack is the perfect solution for families, accounting firms, small businesses or large offices looking for an affordable system that will provide an instant notification in the event of a water leak or potential water damage to their home, office or yard.

One detector with the free app Monitor is capable of detecting moisture leaks in any room! This system can also alert you if your WiFi signal strength falls too low. The sensors are easy to install – -no screws, tape or wires. Just peel off the backing and stick it onto any clean, flat surface.

The sensors are pre-programmed with a 120dB alarm signal when a leak is detected. The app is used to set up, and to monitor your home or office. The alarm can be used to alert you if any of your appliances are leaking.

GRSICO alarms can be added to the 5G WiFi network, which enables them to work with the Smart Hub. The Smart Hub comes with this detector – this is a powerful WiFi hub that can connect to 20 smart devices on a single hub. Your watering system, your HVAC system, and your Smart lights can all be controlled from wherever you are!

9. ZIRCON Water Leak Detector & Flood Sensor

This ZIRCON water leak detector and flood sensor is the perfect device to alert you of leaks in your home. It will sound a 90dB alarm when detecting any leaks. This system will give you plenty of time to act before it is too late.

The product is very easy to set up. Just place it where there may be potential leaks. Once installed there is nothing more to do but sit back and let it work for you. No guessing about where the problem might be! The water leak detector and flood sensor will let you know so that you can take action quickly.

The water leak detector and flood sensor will even let you know when the battery is running low. That way, you’ll be able to replace the battery in good time. Whether you’re going on a few days away or a couple of weeks, knowing the leak detector is functioning while you’re away, will give you peace of mind. If the battery is low, the sensor will begin making an audible alarm once every 5 minutes until you replace it with a new battery.

This water leak detector & flood sensor is completely automatic and is powered by a 9V battery with a battery life of up to six months.

10. THIRDREALITY Zigbee Water Leak Sensor

The THIRDREALITY water leak sensor is a smart, user-friendly device that will help you to monitor places where water leaks are most likely to happen. The sensor sends out an alarm when a leak occurs and alerts you with a loud 120dB alarm sound. You’ll receive instant notifications on your mobile phone, allowing you to take immediate action.

The system is easy to set up and place it near any areas that are likely to have leaks, such as washing machines, dishwashers, faucets, sinks or other sources.

This water leak sensor is powerful, but still has all the great features of the big-brand water leak sensors – like its real-time status, history view, and two AAA 1.5V Alkaline batteries that can last up to three years or through the 3R Protect Manager App. The instant notifications on your mobile phone will allow you to take immediate action.

The THIRDREALITY water leak sensor is there so that you can sleep peacefully at night knowing that if anything happens,  it can be detected immediately, and addressed.

11. INSTAPARK Water Alarm

INSTAPARK is a water alarm that keeps a watchful eye on your property and alerts you to leaks or floods. This inexpensive, easy-to-use device can be plugged into any standard electrical outlet, with the cord extending up to 4 feet.

It has a loud alarm and bright red and yellow LED flashing lights, developed for nighttime visibility, This system warns of water leakage even in the event of an emergency or power outage. It also has a low battery alert function – a short buzzer sound followed by flashing yellow LED lights.

The device is equipped with a 4-foot cord and comes with 3 AAA batteries. Instapark is ideal for placement in hard-to-reach areas, such as fire hydrants, storm drains, irrigation systems and water meters. It is an inexpensive way to safeguard your home without the need for special equipment.

12. LINKIND Wireless Zigbee Water Alarm Sensor

The LINKIND is a wireless water alarm sensor that lasts for many years and can be easily used thanks to its easy design. It connects wirelessly to your Linkind App via the hub which can be set up with an iPhone or Android just by pressing a button on the device itself. Features include:

  • Designed for use indoors or outdoors and has a powerful 90 dB loud sound alarm that helps you identify any leak from afar.
  • A smart LED light indicates if there is any leak or excess moisture in the environment.
  • The device has four work modes.
  • This Water Alarm is easy to use and has great sensitivity.
  • It can be run outside the property.
  • It comes pre-installed with 2-AAA batteries that will power it for 3 years before needing replacement.
  • The Linkind App is a simple, smart and easy to use alarm that works with the water alarm sensor.
  • It is easy to detect any leak from a distance. It functions through a hub that connects to your phone via a 2.4G WiFi network.

13. ORBIT 71003 B-HYVE Flood Water Sensor

The ORBIT 71003 B-HYVE is a flood water sensor that has an audible alarm. It also includes a B-hvye app notification and it connects via Bluetooth 5.0. You’ll even get notifications if your battery gets low.

This is one of those gadgets that could save you a lot of money over time. It is a compact, discrete water level sensor that can be used for standalone or mobile applications.

The sensor works seamlessly by connecting via Bluetooth technology and using Orbit’s B-Hvye smartphone application. It has the ability to detect small amounts of water, even a few drops, and it can be programmed to avoid false alarms. It connects instantly with your smartphone and it includes an audible alarm.

This device also sends notifications to your smartphone when the battery needs changing or if someone tries to disconnect from your Wi-Fi hub! You can also receive notifications if the temperature starts rising or falling outside the normal range, keeping track of what’s happening in your home whether you’re there or not.

14. WASSERSTEIN AC Powered Smart Wi-Fi Water Sensor

The WASSERSTEIN smart water sensor will help you to prevent leaks. This unit has three probes that can be used to monitor different levels of water, and its AC connector comes with an extra 6ft/1.8m cable for added convenience. It is easy to use and functions through an intuitive app that connects wirelessly over Wi-Fi. The device is made of high-grade materials which make it durable, reusable, and reliable.

This sensor is an innovative smart home device that will help you monitor the water level in your water tank or wherever else you need monitoring. With three gold-plated probes, you can measure the level in your water tank to prevent overflow. It is very reliable and easy to use. You just have to place it under the sink or under the water tank, download the app from Apple App Store or Google Play Store, and you’re set!

The WASSERSTEIN smart home monitor can instantly alert you when leaks occur via your smartphone. It’s compact, lightweight and portable. It’s inexpensive and comes with everything needed for installation. It works independently of Wi-Fi.

15. BETTERLINK Wireless Flood Leak Detector

BETTERLINK is a powerful new wireless flood leak detector with an 85dB audible alarm, smart water sensor, and App real-time alarms. It’s easy to use and you can place it flat on the floor or put it anywhere else in your home or office. When it detects water, it sends out an instant notification to the user via the app. Some features are:

  • This system is not only perfect for households but also great for small businesses.
  • It comes with an internal CR123A battery that can last for one year and it’ll notify you when the battery power is low.
  • It has an 85dB alarm so it can spread over a large area if needed, giving you ample time to evacuate the premises safely.
  • The device works with the Tuya Smart App which lets you monitor all your devices from anywhere via your smartphone or tablet.
  • You receive instant emergency notifications directly to your device.
  • Unlike other flood detectors, this system doesn’t require installation.
  • It’s easy to use and can be moved around.
  • It’s also able to connect to any Wi-Fi network so it can be used in all locations.
  • BETTERLINK is an affordable flood detector that you can rely on.


Persons with dementia may remove alarm. You may not hear the alarm if you are in the garage or basement.

If the person is home alone and the alarm sounds, he/she could panic if unable to remember how to turn the faucet or alarm off or sustain a fall, as floors are slippery when wet, especially when one is rushing.