Why I Chose This Product
The Flo by Moen Smart Water Leak Detector is one of the simplest, most effective ways to prevent water damage. It catches leaks, moisture issues, and freezing temperatures early — long before they turn into expensive repairs. Setup is quick, the app is intuitive, and the included remote sensing disc lets you monitor tight spaces like behind washers or under cabinets. When paired with other Moen smart water products, it can even trigger automatic water shut‑off for full‑home protection.
Here’s the part nobody tells you: Frozen pipes don’t start with ice — they start with temperature drops. This detector catches that early.
Best For
- Basements and laundry rooms
- Kitchens and bathrooms
- Under‑sink cabinets and utility closets
- Homes with older plumbing
- Anyone wanting early warning of water problems
Key Features
- Smart leak detection: Sends instant alerts via the Moen Smart Water Network app when water is detected.
- Humidity & temperature monitoring: Helps identify mold risk and freezing‑pipe conditions.
- Remote sensing disc included: Reaches tight areas behind appliances or inside cabinets.
- Wi‑Fi connectivity: Uses 2.4 GHz Wi‑Fi for real‑time alerts and app monitoring.
- Standalone or integrated: Works alone or with Moen’s smart water ecosystem.
- Long‑lasting battery: Powered by a CR123A lithium battery (often up to ~2 years).
Specs
| Feature | Details |
|---|---|
| Brand | Moen |
| Model | Smart Water Leak Detector (920‑004) |
| Connectivity | Wi‑Fi (2.4 GHz) |
| App | Moen Smart Water Network |
| Alerts | Smartphone push notifications |
| Monitors | Moisture, humidity, temperature |
| Battery | CR123A lithium |
| Remote Sensing | Disc included, ~48″ reach |
| Ideal For | Leak‑prone areas throughout the home |
How the Flo Leak Detector Works
Place the detector in a vulnerable area — under a sink, near a water heater, behind a washer, or in a basement. It continuously monitors for moisture, humidity spikes, and temperature drops. When something’s wrong, it instantly alerts your phone so you can act quickly. If you use it with a Moen Smart Water Shutoff (sold separately), it can even trigger automatic water shut‑off.
Smart Leak Detector vs Basic Detectors
Compared to basic standalone sensors: Basic detectors only sound a local alarm. Flo sends alerts to your phone — even if you’re away.
Compared to moisture‑only sensors: Flo also tracks humidity and temperature, catching mold risk and freezing‑pipe conditions.
Compared to full shutoff systems: Flo is affordable and easy to install, but can integrate with Moen’s shutoff valve for full automation.
Who This Is For
- Anyone concerned about water damage
- Homes with older plumbing
- Renters or homeowners wanting remote monitoring
- People who want multiple detectors for full‑home coverage
Pair it with:
- A smart thermostat (freeze protection)
- Smart plugs (appliance monitoring)
- A smart water shutoff valve (automatic shutoff)
Who This Is Not For
- Homes without Wi‑Fi
- Users who prefer non‑smart, manual leak detectors
When to Use Your Smart Leak Detector
- Near water heaters and sump pumps
- Under sinks and around dishwashers
- In basements and laundry areas
- Behind refrigerators and washing machines
- Around any appliance that uses water
What’s Included
- Flo by Moen Smart Leak Detector
- Remote sensing disc
- CR123A battery
- Quick‑start guide
How to Install It
Place the sensor in a leak‑prone area, connect it to Wi‑Fi using the Moen app, and you’re done. No tools required.
Compatibility
- Works with: Moen Smart Water Network
- Wi‑Fi: 2.4 GHz only
- No hub required
- Optional: Moen Smart Water Shutoff (sold separately)
Pros
- Instant alerts
- Monitors leaks + humidity + temperature
- Easy setup
- Works anywhere
- Long battery life
Cons
- Requires Wi‑Fi
- Automatic shutoff requires additional hardware
Real‑World Use Cases
- Detecting slow leaks under kitchen sinks
- Monitoring freezing temperatures in basements
- Catching humidity spikes that lead to mold
- Protecting laundry rooms from washer overflow
- Monitoring vacation homes or rentals remotely
Compared to Other Leak Detectors
- Flo by Moen: Leak + humidity + temp + app alerts
- Basic detectors: Local alarm only
- Moisture‑only sensors: No temp/humidity monitoring
- Full shutoff systems: More expensive, require installation
Customers Often Ask
“Will it alert me if I’m not home?” Yes — alerts are sent instantly to your smartphone.
Why You Can Trust Us
We review dozens of smart home devices each year and only recommend products we’d use in our own homes.
Frequently Asked Questions
Will it notify me if water is detected? Yes — you’ll receive instant smartphone alerts via the Moen app.
Can I add more sensors? Yes — you can install multiple detectors throughout your home.
Does it need Wi‑Fi? Yes — it uses 2.4 GHz Wi‑Fi for real‑time alerts.
Can it trigger automatic shut‑off? Yes — when paired with a compatible Moen Smart Water Shutoff valve.
Protect your home from leaks, mold, and frozen pipes — before they become expensive problems.
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