First Alert WA100 Water Alarm

17 reviews ratings
Walmart #: 001136785
First Alert WA100 Water Alarm
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  • Water sensor attaches to unit or can extend 6'
  • Loud 85dB alarm
  • Splash and water resistant
  • Gifting note: This item ships in the manufacturer's original packaging. If intended as a gift, the packaging may reveal the contents.

    About this item

      First Alert WA100 Water Alarm is designed to protect your home from water damage. Ideal for areas with frequent natural hazards, this flood alarm is, of course, water resistant, so that you can be warned when water is where it shouldn't be. With an extendable sensor, this sump pump alarm is great for detecting threats from leaks, floods, and seepage. This water alarm is perfect for basements, garages, laundry rooms, bathrooms, or hot tubs, so that you will know if there are leaks. Able to fit snugly near sump pumps, washing machines, water heaters and more, this alarm will help you keep your house safe. The 85dB alarm ensures that you are immediately aware when there is a threat, so you can respond quickly and efficiently to keep your house and your family safe.

      Sensor attaches to bottom of unit or can extend 6 feet away
    • Loud 85dB alarm sounds when unit senses water
    • Alarm continues for up to 72 hrs
    • Splash and water resistant
    • 2 Year Warranty


    Battery Type: Carbon Zinc
    Multi Pack Indicator: No
    Model No.: WA100
    Shipping Weight (in pounds): 0.35
    Product in Inches (L x W x H): 2.5 x 1.31 x 3.75
    Assembled in Country of Origin: Imported
    Origin of Components: Imported
    Walmart No.: 1136785

    Customer reviews

    Customer Reviews | 17 reviews | 4.9 out of 5

    5.0 stars

    17 reviews | 4.9 out of 5

    5 stars
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    1 stars
    Would recommend to a friend



    great product and good value

    Customer review by three4

    5.0 stars by three4

    Seems to work well. We pruchased this item because of a recent hot water tank leak. Hope to never have a use for it. But we tested it out and it really worked well. Was very loud. Good name and we trust First Alert for our smoke alarms so I will put my trust in this for a water leak.

    Was this review helpful? (14) (0)
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    Letart, WV
    Would recommend to a friend? Yes
    Age:35 - 44
    Ownership:2 - 7 weeks

    Customer review by ValueIsMe

    5.0 stars by ValueIsMe

    First Alert water detector devise is cheap insurance. Senstive to even a slight amount of water. EZ to set up.

    Was this review helpful? (7) (1)
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    Ft Myers Florida
    Would recommend to a friend? Yes
    Age:65 or older
    Ownership:2 - 7 weeks
    Usage:Every day

    Customer review by petechesapeake

    5.0 stars by petechesapeake

    Hook up additional wires in parallel and cover multiple areas (close by) with one unit. I am covering two a/c air handlers in pans along with a humidifier.

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    Would recommend to a friend? Yes
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    1-3 of 14 total reviews See all

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    Does it run on either/or battery or electric or do you need both? Also, do you place it on the water heater or the floor around the water heater?
    by an anonymous customer 2/23/2011
    • both battery at site then other part plugsin to wall
      by farm150011/9/2014
      Was this answer helpful? (0) (0)
    • It is battery operated only. Under my hot water heater is a tray that is required by code. I used the "remote" feature and put the sensor in the bottom of the tray and mounted the alarm about eye level. It makes it easier to change batteries once a year. If you do not have the tray, you can mount the sensor on the floor under the hot water heater. I have 3 of these and they work great.
      by Poindexter214812/23/2014
      Was this answer helpful? (2) (0)
    • It is battery, 9 Volt, operated. You place the sensor contact down on the floor where it will get wet. I placed mine in a the pan that the water heater is in. The pan is metal so I had to put down some tape to keep the aluminum pan from shorting the sensor contacts.
      by AlnF12/23/2014
      Was this answer helpful? (2) (0)
    • 9V battery included. It goes on the floor where the leak would be. The sensors also pull put on about 6' of wire so you can put the alarm part in easy reach or where it can be heard easily
      by petechesapeake12/23/2014
      Was this answer helpful? (1) (0)
    • This runs on battery, and you, place it on the floor near the water heater. Hope this helps.
      by Junie612/23/2014
      Was this answer helpful? (1) (0)
    • Runs on 9 volt battery. Placed on floor.
      by bigbuyr12/23/2014
      Was this answer helpful? (2) (0)
    1-3 of 6 questions See all

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    Product warranty: 2 years See details

    Supplier Warranty: 2 year limited warranty
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