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Battery-Powered Sensors Detect Water Leaks and Sound an Immediate Alarm
Water Warning Leak Detection Alarm (5-Pack)
Water Warning Leak Detection Alarm (5-Pack)
Water Warning Leak Detection Alarm, 5 Pack
Item# 71635
Free shipping on orders over $175 - See Details


  • Battery-powered sensor can be placed anywhere
  • Stainless-steel sensors won't rust or stain
  • Loud 110dB alarm runs for 3 days

Essential Info

Protect your home against costly water damage and dangerous toxic mold by catching water leaks early. The Water Warning Leak Detection Alarm is a battery-powered sensor that can be placed almost anywhere. It emits a loud alarm the moment its stainless-steel sensors touch water, alerting you instantly that your home is in danger.

Since it can be placed upright or flat, the Water Warning Leak Detection Alarm can fit easily and discreetly at the base of water heaters, sinks, or toilets, as well as near plumbing connections or hoses, any water-using appliance or device that has the potential to leak and cause damage. Its stainless-steel sensors won't rust or stain your floors.

When the Water Warning Leak Detection Alarm senses water, it sounds its loud, 110-decibel alarm intermittently for up to 3 days, so even if you're not at home when it first senses water, you'll know as soon as you arrive. The Water Warning Leak Detection Alarm is powered by the included 9-volt battery.

Protect every water-producing area in your home: The Water Warning Leak Detection Alarm is also available individually.

Not sure about this product? The Smarthome MT400 Water Leak Detection Alarm is now available in a different form factor that is reminiscent of an air freshener. Perfect for your backroom! Quantity discounts available. View it here.

What's Included

  • Water sensor
  • 9-volt battery
  • Instructions
  • Specifications


    Water Warning Product No.:00001
    Dimensions:3 1/8" x 2 5/8" x 7/8"
    Power:9-volt battery
    Maximum Alarm Time:3 days
    Sensors:Stainless steel
    Warranty:3 years, limited


    43 Ratings
    5 star: 56%  (24)
    4 star: 33%  (14)
    3 star: 5%  (2)
    2 star: 2%  (1)
    1 star: 5%  (2)
    Average Customer Rating
    (43 customer ratings)
    Share your thoughts with other customers
    ABBEY -- tamarac, FL   11/8/2011
    I purchased these for myself last year and I truly the alarms when one went off under my kitchen sink. It saved me a LOT of aggravation by early warning. I gave this order to a dear friend for a house warming gift telling her that I hope she never hears the alarm go off, however, hoping it would give her piece of mind. I wish an alarm would sound when the batteries get low.
    KENNETH -- naples, FL   11/6/2011
    Very clever design but the battery contacts are flimsy. Two units broke when the battery was attached.
    HANS -- honolulu, HI   9/2/2011
    Relatively easy to install, except for battery. When tested with water, one unit did not respond, required repeated testing before it became functional. A test button similar to a smoke detector would be helpful.
    KEN -- redding, CA   8/23/2011
    Item already sent an alarm. Great purchase!
    Shelli -- Simi Valley   8/10/2011
    Oh my gosh! We placed them all over the house. We went on vacation and the first night back the one under the kitchen sink detected a leak. It saved our new hardwood floors in the kitchen. A year later we detected a leak under the bathroom sink before it could do any damage. This is the most useful product I have ever bought. I think it is a must for people who have wood floors. I recommend them to everyone.
    ANATOLIY -- los angeles, CA   7/9/2011
    Great stuff! Outstanding merchant! Thanks!
    LIONEL -- west hollywood, CA   6/24/2011
    Very good buy!
    PAUL -- fullerton, CA   6/12/2011
    Value for the price is unbeatable. No "installation" is involved other than placing where you don't want any water. Time will tell if the alarm works as advertised. Testing indicates that it will but it has only been a month since I placed the sensors.
    LIZ -- vancouver, BC   5/9/2011
    One for the washer, dryer, and one each for the bathrooms.....for my peace of mind...thank you.
    JOE -- orillia, ON   5/6/2011
    Good value. I have had same items for more than 4 years with no problems. Only critisism, the battery leads on most units are short making installing battery difficult. Once in place everything else is as advertised. JA
    TOM -- poughquag, NY   5/3/2011
    Just as described, all units work properly and were approx. 1/3 the price of local hardware store. Thank you.
    LORETTA H. -- san antonio, TX   4/27/2011
    We received the items and were easy to put in place. We are pleased with the delivery and all is going well.
    ALEX -- cumberland, RI   4/25/2011
    They work fine, only wish they had some type of an output to assist in remote monitoring..
    LEO -- davis, IL   1/28/2011
    nice to do business with you,LK
    NEAL -- fort worth, TX   1/27/2011
    I've had one of these between my washer and dryer for over a month now with no issues. I gave several to friends who had major leaks recently.
    RICHARD -- kailua kona, HI   1/23/2011
    Indispensable. We have a two-story house and have had major water damage from leaks. These alarms have stopped at least two additional catastrophes.
    burned_by_water_more_than_once -- washington, D.C.   1/12/2011
    I first bought 5 of these water detectors after the hose to our dishwasher streamed a steady and undetected leak under our kitchen cabinets and hardwood floorboards. Those 5 units came as advertised and were easy to enable and deploy. They stand on guard still. Then, we decided that to extend the protection to water sources throughout the house bathrooms, laundry, hot water heaters, furnace humidifers, etc.. So, we bouth 30 of these units in total and planned to put them by every water source we could find. The low cost and simple technology of the product makes that possible - and given the cost we suffered early, not being protected, this is a worthwhile investment for us. BUT - with this order of 30 units, the batteries that come with the units were defective. And, every one we attached did not arm the units. There are 2 problems: the 2 pin connectors on the 9 volt batteries provided have a defect and did not connect to the units. Second, many of the wire leads from the units that connect to these 9 volt batteries are too short and make it extremely difficult to connect a battery at all. NOW, we went out and bought 30 new 9 volt batteries and conencted 28 of them. Tested them and have now deployed them as new water guards. The other 2 are going back as returns to Smarthome. The bag of 30 batteries from the vendor are sitting on my desk; hopefully to be returned and refunded by the manufacturer. Good product idea and value for money; but don't count on the battery included. Add $1.50 to your product cost calculator for the new battery you may have to install on Day 1.
    PETER -- levittown, NY   1/10/2011
    I ordered a total of 8 of these alarms. I had one that was defective out of the packaging but got a replacement from Smarthome quickly. One of the units has already worked for me. There was a small amount of liquid under a bathroom faucet in a cabinet. I still don't know what was leaking but I suspect a package of baby wipes that was on it's side was the culprit. It was a small amount of liquid but the alarm did sound.
    THOMAS -- newberry, FL   12/5/2010
    Easy to hide anywhere you want and gives peace of mind. Recommend a 5 pack, which should cover everything
    MARCUS -- silver spring, MD   11/16/2010
    Pros - Worked within the first week I used them. One alarm went off because of toilet sweat and top of the tank wasn't on properly. Water was splashing out and over. Cons - The batteries they come with only last 30 days according to the package. The battery compartment may be too snug to put the battery in. The 9 volt connection leads are also too short to attach the battery without some serious fiddling. While you to connect the batter, the alarm goes off. It's maddening.

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