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Sensor Type
Water Leak / Flood
Audible Indicator
Battery Backup
Ease of Installation
Beginner (Installs < 10 minutes)
First Alert
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Helps Protect your Home from Water Damage Caused by Leaks or Floods
First Alert WA100-3 Water Sensor Alarm (3-Pack)
First Alert WA100-3 Water Sensor Alarm (3-Pack)
First Alert WA100-3 Water Sensor Alarm (3-Pack)
Item# 79867
Price: Normally $59.99 
Hot Deal $32.50
Free shipping on orders over $175 - See Details


  • Splash and water resistant
  • Equip with an alarm that will sound for 72 hours

Essential Info

Protect your home appliances from water damage that can be caused by slow leaks, floods or sitting water.This water sensor alarm is ideal for your basement, garage, laundry room or kitchen. Simply place this sensor near your large appliances, like the refridgerator or washing machine, and let the sensor do its job. If it senses water, its built in alarm will sound and let you know that you may need to stop a leak or take care of the water before it is too late. These sensors require a 9 volt battery and are water resistant. The First Alert Water Sensor Alarms operate on 9-Volt batteries, included.

What's Included

  • 3x - Water Sensor Alarm
  • 3x - 9 Volt Battery
  • Specifications

    Operates in 32 to 120 degrees F, 80% RH


    5 Ratings
    5 star: 20%  (1)
    4 star: 0%  (0)
    3 star: 20%  (1)
    2 star: 20%  (1)
    1 star: 40%  (2)
    Average Customer Rating
    (5 customer ratings)
    Share your thoughts with other customers
    WILLIAM -- chepachet, RI   10/1/2012
    Works well - very sensitive, but could use a "kill switch" (on/off). I mounted these about 1/2" above the floor and stuffed a dry sponge between the contacts and the floor. That way, if the alarm goes off, the sponge can be yanked out to stop the sound. I installed an on/off switch on the ones that I used with the sensor wire extended, such as under the washing machine. I still suggest the use of a dry sponge attached the the contact to ensure water detection. The detached contacts are too light to stay in place otherwise.
    IAN -- st nicolas, QC   8/28/2011
    Exactly what I was looking for. Thank you.


    Alkaline 9-Volt Batteries       
    Alkaline 9-Volt Batteries       

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