Three white round water leak alarms printed with Leakage alarm on a white background
Home Protection

Water Leak Alarm (3-Pack)

Set it on the floor. When water reaches it, you’ll hear it.

$39.99One-time · free tracked shipping
Black Friday: 25% off. It comes off at checkout, no code. Ends Monday 11:59pm Eastern.
Free tracked shipping Free 30-day returns 1-year warranty
  • Nothing to set upNo buttons and no programming. Put it on the floor where a leak would start, and it’s doing its job.
  • A 90 dB alarmWhen water reaches it, it sounds off. That helps with spots you can’t see, like the back of a sink cabinet.
  • Three spots coveredYou get 3 alarms, so you can cover the kitchen sink, the water heater and the washing machine in one go.
  • Batteries in the packEach alarm runs on a 9V battery, and the batteries are included. There’s no Wi-Fi and no app to deal with.
Water Leak Alarm (3-Pack) $39.99

Why listen for water

The floor can tell you before the ceiling does.

Water tends to start somewhere out of sight. A joint under the sink, the hose behind the washer, the base of a water heater in a closet. You only see these places when you go looking, and nobody goes looking on a normal Tuesday. It’s a reasonable thing to worry about, and it’s also a simple one to do something about.

A leak alarm sits right where the water would land. It doesn’t need your attention, and it doesn’t need a connection. It just waits on the floor. The day water reaches it, you get a sound where before you’d have had silence.

Picture the difference. You’re on the couch when the alarm goes off in the kitchen. You open the cabinet, find a wet floor, and turn off the valve under the sink. Then you grab a towel and call a plumber in your own time. It’s still a bad afternoon. But it’s a short one, and you caught it yourself.

Leave a small alarm where you’d never think to look.
3alarms
in every pack
90dB
alarm when water reaches it
9V
batteries included
0buttons
no programming, no app
White water leak alarm on the floor under a kitchen sink beside the pipes
Pick your three spots

Choose the spots you’d hear, and the leaks you wouldn’t see.

Because this alarm sounds in the room it’s in, placement is half the job. A closed cabinet, a closed basement door and a running dryer all make it harder to hear. Before you settle on a spot, test it there with the doors shut as they normally are, and have someone listen from the bedroom. If they can’t hear it, leave a door ajar or move on to the next spot on your list.

Then check the fit. Each alarm is about 1.4 in (3.5 cm) tall and needs to sit on the floor itself, so measure before you try to slide one under an appliance. Keep it clear of boxes and cleaning bottles in a sink cabinet. On a sloped floor, go to the low side of the pipe, since that’s the way the water runs.

90 dB alarm9V batteries includedNo appIndoor use
Setup

The only real job is picking the spots

1

Check the battery

Each alarm runs on a 9V battery, and the batteries are in the pack. Make sure one is fitted in each alarm.

2

Hear it once

Put a thin layer of water on a plate and set the alarm on it, so you know the sound. Lift it out and dry it off.

3

Set it on the floor

Put it flat on the floor where a leak would start, close to the pipe or hose and on the low side.

4

Listen from the bedroom

Repeat the test in that spot with the doors shut, and have someone listen from the bedroom. If the sound doesn’t carry, leave a door ajar or pick another spot.

Dry each alarm fully before you put it back. Test them when you check your smoke alarms, so it becomes part of a habit you already have.
Where they go

Anywhere a pipe or hose meets the floor out of sight

Think of the kitchen sink, the bathroom sink, the water heater, the washing machine, the toilet or the basement. These suit a house or a rental, and there’s nothing to install or wire in. You get 3 alarms, with the 9V batteries included. If they don’t suit your home, send them back inside 30 days. Shipping to the US, Canada, the UK, Australia and New Zealand is free and tracked, and most orders arrive 1 to 3 weeks after ordering.

Layer your defense

Cover the pipes. Then cover the doors and windows.

A simple alarm is easy to live with: no app, nothing to program, one loud sound when it counts. The same idea works at your doors and windows. The TremShield Alarm sticks onto the door or the glass and fires a 125 dB siren the moment it’s forced, with no Wi-Fi and no subscription. One alarm is $29.99; six are $99, which is $16.50 per alarm (Save $80.94).

See the alarm
White TremShield vibration sensor alarm
Good to know

Questions, answered calmly

Put it on the floor where a leak would start: under a sink, by the water heater, by the washing machine, next to a toilet or in the basement. Keep it close to the pipe or hose, on the low side if the floor slopes, and in a spot you’d hear it from.

No. This water leak alarm has no Wi-Fi, no app and no phone alerts. It sounds a 90 dB alarm in your home when water reaches it, so you have to be home to hear it.

It sounds a 90 dB alarm when water reaches it. Closed doors and cabinets will make it quieter in other rooms, so test it in its final spot and listen from where you sleep.

No programming is needed, and there are no buttons. Each alarm runs on a 9V battery, and the batteries are included. The pack has 3 alarms. Put one flat on the floor where a leak would start.

No. This alarm makes a sound and does nothing to the water supply. It reacts once water reaches it, and someone at home then needs to deal with the leak, for example by turning off the valve near it.

No. This alarm is for indoor use only. It belongs on floors inside your home, like under sinks, near a water heater or washing machine, by a toilet or in a basement.

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