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THE BASEMENT WATCHDOG Model BWD-HWA 110 dB Battery Operated Water Alarm

4.7 4.7 out of 5 stars 7,560 ratings
$12.48 with 37 percent savings
List Price: $19.95

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Purchase options and add-ons

Color Multi
Brand THE BASEMENT WATCHDOG
Power Source Battery Powered
Product Dimensions 3.25"L x 1.25"W x 4.25"H
Voltage 9 Volts

About this item

  • Detects as little as 1/32 in. of water to offer an effective early warning system
  • Solid-state circuitry is extremely sensitive and reliable
  • Loud 110 dB alarm can be heard throughout the house
  • Sensor has a 6 ft. wire so it can be extended into a sump pit, or mounted on a wall
  • Accommodates the addition of more than 100 ft. of wire (additional 24-Gauge wire not included)
› See more product details

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Customer ratings by feature

Easy to install
4.8 4.8
Battery life
4.7 4.7
Noise level
4.6 4.6
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THE BASEMENT WATCHDOG Model BWD-HWA 110 dB Battery Operated Water Alarm
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THE BASEMENT WATCHDOG Model BW-WA360 110 dB Battery Operated Water Alarm
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User Manual (PDF)

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Product Description

Features of The Basement Watchdog Water Alarm

Basement Watchdog High Water Alarm, water alarm placement, dry basement, water alarm, Model BWD-HWA

Basement Watchdog High Water Alarm, water alarm sensor, dry basement, water alarm, Model BWD-HWA

Basement Watchdog High Water Alarm, cost-effective protection, no flooding, dry house, Model BWD-HWA

Place It Anywhere

Put The Basement Watchdog High Water Alarm (Model BWD-HWA) next to a water heater, under a laundry tub, a sink, or anywhere water damage is likely. The alarm includes 6' of wire, which you can extend up to 100', allowing the sensor to be used in hard-to-reach places.

Detects Leaks, Big and Small

All it takes is 1/32" of water to set off a piercing, 110 dB alarm. The problem is detected before a flood occurs or mold can grow. The Basement Watchdog High Water Alarm (Model BWD-HWA) is so sensitive that the moisture from your fingers is enough to set off the alarm.

Small Investment, Big Protection

Your small investment gets you big protection. The Basement Watchdog High Water Alarm (Model BWD-HWA) gives you an early warning system that will save thousands in cleanup and repairs by heading off a drip that started under your sink, a broken fridge water line, or a water heater that sprung a major leak.

protecting basements, stop flooding, dry basement, Basement Watchdog, backup pump, sump pump

30+ Years Protecting Basements

The Basement Watchdog has been protecting homes for over 30 years and continues to lead the pack. We build the most dependable, user-friendly pumps and accessories in the industry using intelligent design, premium components, and quality manufacturing practices that include thoroughly testing every single unit.

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Price-37% $12.48
List: $19.95		$18.99$15.99$21.99$12.99$14.95
Delivery
Get it as soon as Tuesday, Apr 30
Get it as soon as Tuesday, Apr 30
Get it as soon as Tuesday, Apr 30
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Get it as soon as Tuesday, Apr 30
Get it as soon as Tuesday, Apr 30
Customer Ratings
4.74.7 out of 5 stars7,560
4.54.5 out of 5 stars95
4.54.5 out of 5 stars703
4.54.5 out of 5 stars703
4.54.5 out of 5 stars1,192
4.34.3 out of 5 stars60
Easy to install
4.8
4.4
5.0
5.0
4.5
4.6
Battery life
4.7
4.4
4.3
4.3
5.0
4.0
Noise level
4.6
4.3
4.2
4.2
—
3.9
Tech Support
—
—
4.5
4.5
3.8
5.0
Value for money
—
—
4.3
4.3
4.3
5.0
Sold By
Glentronics
Glentronics
Future Day
Future Day
GEEVON Electronics
Topvico INC

Important information

Bulb Voltage

9 volts

Customer reviews

4.7 out of 5 stars
4.7 out of 5
7,560 global ratings

Customers say

Customers like the value and sensitivity of the leak detector. For example, they mention it's well worth the money, and can save you thousands of dollars. That said, opinions are mixed on ease of use, noise, water resistance, and battery life.

AI-generated from the text of customer reviews

1,008 customers mention860 positive148 negative

Customers like the quality of the water alarm. They mention it's simple and effective, works reasonably well, and does a good job. Some say the alarms are invaluable and have saved their lives on several occasions.

"...These alarms do a very good job, but there are newer wireless sensors that communicate with a central receiver; can alert you through phone or email..." Read more

"...It will protect and warn you of any problems that can occur even even if no one knows what it is they’ll hear the beeping and let you know...." Read more

"...It's perfect. The ability to put the sensor anywhere and away from the main unit is super...." Read more

"...several feet so you can drop it in a catch bucket and the alarm doesn’t go under water. So many uses. Almost as important as a smoke detector...." Read more

478 customers mention449 positive29 negative

Customers appreciate the value of the alarm. They say it's good value for piece of mind, and could save you thousands of dollars and stress. Some customers also say it’s a solid five star bargain, and an excellent product.

"...to repair drywall from the water heater leak (16 yrs old), this was inexpensive, easy to install and has a loud high pitched alarm that cannot be..." Read more

"...It's a small price to pay, considering that water damage is often one of the most common home disasters, and often isn't covered by insurance..." Read more

"...make a noise and then I wipe it dry again Definitely definitely worth the investment...." Read more

"...This alarm can save you a lot of money, time, and anxiety down the road. Don’t forget batteries!" Read more

251 customers mention247 positive4 negative

Customers find the setup of the water alarm to be easy. They mention that the concept is simple, the mechanism is simple that it can't fail, and the alarm is easy to hear. They also appreciate the many options for installation, including standalone, a 5-ft+ wired remote sensor, and a battery-powered remote sensor.

"...from the water heater leak (16 yrs old), this was inexpensive, easy to install and has a loud high pitched alarm that cannot be missed...." Read more

"...Just change the battery. Very easy to check if it’s still working I just touch my finger with water on the bottom and I’ll make a noise and then I..." Read more

"Ease of installation. Price.Repeat customer." Read more

"Easy to set up. Put it in my basement and someone unplugged my sump pump and that thing went off right away. Saved the day best money I ever spent...." Read more

64 customers mention47 positive17 negative

Customers generally like the sensitivity of the tool. They say it's extremely sensitive in detecting the slightest bit of water. Some mention that the contacts on the bottom are very sensitive and will detect the slight amount of water, while others say that it'll go off if they simply touch their fingers.

"...I like that this unit is the most sensitive one that I have tested - it will alarm even with the slightest trace of conductance, e.g. dry fingers on..." Read more

"These simple little alarms are incredibly powerful. The alarm is very sensitive to even the slightest bit of water so you will be aware as soon as..." Read more

"I tested it with light water underneath and it's very sensitive. Alarm will go off and will only stop once you wipe the two metal underneath dry...." Read more

"...purchased this brand of water alarm in the past and they are a very sensitive alarm. I use them in several places around the house and basement...." Read more

576 customers mention340 positive236 negative

Customers have mixed opinions about the noise the product makes. Some find the alarm very loud and easy to hear, while others say it's extremely loud and difficult to hear. Some customers also mention that the product is not as loud as a smoke detector and that it starts howling like a fire alarm when it gets damp.

"...(16 yrs old), this was inexpensive, easy to install and has a loud high pitched alarm that cannot be missed...." Read more

"...The alarm is loud, but it is just a steady, very high-pitched tone, which can be hard to hear if you have any hearing loss...." Read more

"...The alarm is louder than most and will certainly get your attention...." Read more

"...continuous and loud squeal. I love it. The instructions said the alarm would sound for three continuous days before the battery was depleted...." Read more

151 customers mention78 positive73 negative

Customers are mixed about the ease of use of the water leak alarm. Some mention that it detects leaks as soon as they occur, is extremely effective, and has saved them a big time with a leak. They say it's a universal water leak detector good for many different situations, and responds quickly to any leaks. However, some customers say that connections had a crack and was leaking.

"...This product has immediate alerted me to leaks that I wouldn’t have found for weeks or months, allowing me to immediately mitigate...." Read more

"...Water was leaking where the hose connects to the fridge, small amounts of water every time someone filled their cup, but it was adding up...." Read more

"...They respond quickly to any leaks. This is an item that I recommend to all friends and family...." Read more

"...The bathroom sink connection began leaking and the alarm alerted me. Without the alarm, I doubt the leak would have been noticed...." Read more

142 customers mention90 positive52 negative

Customers are mixed about the water resistance of the product. Some mention that it has saved them from water damage, and saved their basement from flooding. The alarm is very sensitive to moisture, and it adds water damage. Others say that the utility room floor was wet, but not the rest of the house.

"One month after I put it under sink had leak at 12:45 am. Alarm saved house from flooding… several, too many neighbors had recent with months..." Read more

"...: Update , I started to get false alarms, apparently very sensitive to any moisture ( water splashes ) , I had to reposition the sensor from face..." Read more

"...2 contacts on the bottom of this thing and paper towels wick up water very effectively. It seems my setup worked...." Read more

"...devices and have saved us from having numerous water leaks and added water damage...." Read more

97 customers mention64 positive33 negative

Customers are mixed about the battery life of the tool. Some mention it has great battery life, does not pull energy from the battery unless it's being used, and looks forward to it lasting a long time. Others say that it did not come with a battery, the compartment door slid off with no tool, and the circuit lacks a low-battery warning.

"...It doesn't draw any current until it detects water, so if you put in a good quality battery, it will silently guard your house for several years...." Read more

"...9 volt battery not included and I just set it up so I did not review the battery life...." Read more

"...or almost completely passive which means that it uses little or no electricity until the 2 contacts on the bottom come in contact with water which..." Read more

"...One of the units is over a year old and the battery is still good. You should test them periodically. Recommend these!" Read more

It is loud.
5 Stars
It is loud.
I needed one for the sump. You can see in the picture that I hot glued a small metal bracket to it and clamped it to the pump pipe at just above the high water level when the pump would turn on. If the pump fails this alarm sounds, it doesn’t chirp but it is onecontinuous and loud squeal. I love it. The instructions said the alarm would sound for three continuous days before the battery was depleted. : Update , I started to get false alarms, apparently very sensitive to any moisture ( water splashes ) , I had to reposition the sensor from face down to standing up ( not face up) , water runs off now, end of problem.
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Top reviews from the United States

Amazon Customer
5.0 out of 5 stars Great and inexpensive water alarm
Reviewed in the United States on March 23, 2024
Verified Purchase
After having to repair drywall from the water heater leak (16 yrs old), this was inexpensive, easy to install and has a loud high pitched alarm that cannot be missed. I bought 3--one for each of two water heaters with their new drain pans, and one for the laundry room. I wish I bought them last year!
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Brian D.
5.0 out of 5 stars Terrific early warning for water leaks!
Reviewed in the United States on August 10, 2023
Verified Purchase
I've had Basement Watchdog water alarms by my furnace and water heater for years, but after a sink leak, and a toilet leak, and a AC drain line leak, I bought a bunch of these alarms and put them EVERY place I have plumbing or drain lines. I also put one by my sump pump, since sump pump failures are surprisingly common.

It doesn't draw any current until it detects water, so if you put in a good quality battery, it will silently guard your house for several years. It will work better if you set it on a paper towel, so that any water in the area will be quickly absorbed and will trigger the alarm.

The alarm is loud, but it is just a steady, very high-pitched tone, which can be hard to hear if you have any hearing loss. A warble or beeping tone would be better, but they have a newer model that has a siren that sounds like a smoke detector alarm.

I like that it comes with a built-in six foot cord hidden inside the body, so I can extend the sensor to a hard-to-reach place.

These alarms do a very good job, but there are newer wireless sensors that communicate with a central receiver; can alert you through phone or email even if you are not home; and can even automatically close your main shut-off valve if a leak is detected. It's a small price to pay, considering that water damage is often one of the most common home disasters, and often isn't covered by insurance (as I just found out).
9 people found this helpful
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Alexander
5.0 out of 5 stars Best protection equipment you can buy !
Reviewed in the United States on February 4, 2024
Verified Purchase
I have these in several locations throughout my property and I’ve been using these for over 10 years and I’ve never had one go bad. Just change the battery. Very easy to check if it’s still working I just touch my finger with water on the bottom and I’ll make a noise and then I wipe it dry again Definitely definitely worth the investment. It will protect and warn you of any problems that can occur even even if no one knows what it is they’ll hear the beeping and let you know. Don’t even tell my tenants that they exist or what they do. They’ll call me when they hear it going off and they can’t stop it , because they don’t know where to look .
4 people found this helpful
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Amazon Customer
4.0 out of 5 stars Great little boxes for piece of mind.
Reviewed in the United States on March 24, 2024
Verified Purchase
Ease of installation. Price.
Repeat customer.
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Hankster
5.0 out of 5 stars The best
Reviewed in the United States on April 7, 2024
Verified Purchase
After other units crapped out for one reason or another, I tried this. It's perfect. The ability to put the sensor anywhere and away from the main unit is super. The alarm is louder than most and will certainly get your attention. One thing to look for once installed - make sure the sensor sits flat on the floor. The rather stiff wire might cause it to lift up so I put a little piece of wood on it to keep it flat.
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Marianne Reiner
5.0 out of 5 stars This simple product has saved me $$$$
Reviewed in the United States on April 5, 2024
Verified Purchase
Water leaks and resulting mold damage that comes from leaks that are undetected can cost thousands of dollars in repairs and restoration, not to mention the resulting adverse health conditions. This product has immediate alerted me to leaks that I wouldn’t have found for weeks or months, allowing me to immediately mitigate. It’s fairly simple technology. I keep buying more to cover the entire house under sinks, behind the washing machine, next to the water heater, etc. The sensor also detaches several feet so you can drop it in a catch bucket and the alarm doesn’t go under water. So many uses. Almost as important as a smoke detector. Highly recommend!
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Mandi
5.0 out of 5 stars This alarm can save you a lot of money, time, and anxiety down the road.
Reviewed in the United States on November 19, 2023
Verified Purchase
These water alarms are invaluable. I bought some years back after the water line behind our fridge broke and destroyed 80 year old hardwoods. I bought a dozen of these alarms and placed one at every water source in the house — behind toilets, under sinks, behind the fridge and washer, etc. Fast forward 5 years, we’re in a new house and again have these everywhere. Today the alarm behind the fridge started going off. Pull the fridge out of its nook and wouldn’t you know it—the water alarm is sitting in small puddle under the water line. Water was leaking where the hose connects to the fridge, small amounts of water every time someone filled their cup, but it was adding up. We wouldn’t have known because we don’t ever look behind the fridge. So if you buy one water alarm today, buy one for behind your fridge. I read fridge water lines are blamed for the majority of leaks in homes. This alarm can save you a lot of money, time, and anxiety down the road. Don’t forget batteries!
13 people found this helpful
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Larry
5.0 out of 5 stars It is loud.
Reviewed in the United States on March 19, 2024
Verified Purchase
I needed one for the sump. You can see in the picture that I hot glued a small metal bracket to it and clamped it to the pump pipe at just above the high water level when the pump would turn on. If the pump fails this alarm sounds, it doesn’t chirp but it is one
continuous and loud squeal. I love it. The instructions said the alarm would sound for three continuous days before the battery was depleted. : Update , I started to get false alarms, apparently very sensitive to any moisture ( water splashes ) , I had to reposition the sensor from face down to standing up ( not face up) , water runs off now, end of problem.
Customer image
Larry
5.0 out of 5 stars It is loud.
Reviewed in the United States on March 19, 2024
I needed one for the sump. You can see in the picture that I hot glued a small metal bracket to it and clamped it to the pump pipe at just above the high water level when the pump would turn on. If the pump fails this alarm sounds, it doesn’t chirp but it is one
continuous and loud squeal. I love it. The instructions said the alarm would sound for three continuous days before the battery was depleted. : Update , I started to get false alarms, apparently very sensitive to any moisture ( water splashes ) , I had to reposition the sensor from face down to standing up ( not face up) , water runs off now, end of problem.
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One person found this helpful
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Top reviews from other countries

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IOANIS SPIROPOULOS
5.0 out of 5 stars Very satisfactory
Reviewed in Canada on December 27, 2023
Verified Purchase
Not extremely sensitive, activates only in contact with water, not with air humidity.
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Priscila Cabrera
5.0 out of 5 stars Cumple su función
Reviewed in Mexico on December 18, 2018
Verified Purchase
No es estético pero cumple su función.
Ojalá que hagan versiones más estéticas.
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Glen Nadeau
5.0 out of 5 stars Simple but effective
Reviewed in Canada on July 5, 2023
Verified Purchase
Easy to install,very loud alarm. Simple,simple simple. Only has to function one time to save major home damage.
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Richard
4.0 out of 5 stars Eau au sous-sol
Reviewed in Canada on May 3, 2023
Verified Purchase
J'ai une pompe de puisard au sous-sol qui rejette l'eau à l'extérieur quand la nappe d'eau monte trop. J'ai installé le détecteur à 6 cm (2.5 pouces) sous le niveau du plancher en le vissant sur une petite planche (Voir la photo). À l'arrière de la boîte principale, il y a une encoche qui permet de l'accrochée au mur, maximum 1.5 m (5 pieds) plus haut.
Il arrive, surtout au printemps, que l'eau monte plus que normal et s'il manque d'électricité ou que la pompe tombe en panne, j'espère être avisé par le son "strident" de l'alarme. J'ai testé le détecteur et il fonctionne normalement.
Customer image
Richard
4.0 out of 5 stars Eau au sous-sol
Reviewed in Canada on May 3, 2023
J'ai une pompe de puisard au sous-sol qui rejette l'eau à l'extérieur quand la nappe d'eau monte trop. J'ai installé le détecteur à 6 cm (2.5 pouces) sous le niveau du plancher en le vissant sur une petite planche (Voir la photo). À l'arrière de la boîte principale, il y a une encoche qui permet de l'accrochée au mur, maximum 1.5 m (5 pieds) plus haut.
Il arrive, surtout au printemps, que l'eau monte plus que normal et s'il manque d'électricité ou que la pompe tombe en panne, j'espère être avisé par le son "strident" de l'alarme. J'ai testé le détecteur et il fonctionne normalement.
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One person found this helpful
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Bertron
5.0 out of 5 stars Ça l'air très efficace
Reviewed in Canada on November 7, 2023
Verified Purchase
Pour mettre dans les bacs en dessous des réservoirs d'eau chaude
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