Flo Smart Water Monitor and Automatic Shutoff Sensor - Whole-Home Leak

In this review the Moen Flo Smart Water Monitor and Shutoff is evaluated as a whole-home plumbing safety device for homeowners who want continuous leak detection and automated protection. The bottom line: this device is for anyone prepared to install a sensor on the main 1-in pipe to get live flow, pressure and temperature data and an automatic shutoff if the system detects issues. The review focuses on what it monitors, how it alerts, and why the automatic shutoff paired with the Moen Smart Water App is the single biggest reason to consider it.

Key Features

• Continuous monitoring: Provides 24/7 detection of water use and vulnerabilities so small leaks can be noticed before they cause damage.
• Automatic shutoff: Shuts the main water supply when high risk conditions are detected, reducing the chance of major water loss.
• Live data in the app: Shows real-time water flow rates, pressure and temperature so you can assess system health remotely.
• No extra sensors required: Detects leaks as small as one drop per minute from a single installed unit on the main supply line.
• Designed by pros: Engineered by plumbing and technology professionals to fit standard residential installations and provide reliable protection.

Who It's For

The Flo monitor is best for homeowners, landlords or property managers who want proactive water security installed at the main 1-in pipe and who are comfortable using a mobile app for alerts and diagnostics. It suits houses with finished basements, vacation homes, or any property where an unattended leak could cause substantial damage.

It may not be ideal for someone who cannot access the main supply line, needs a battery-powered tile sensor for a specific room, or who prefers a simple plug-and-play detector without app-based monitoring and automatic shutoff capabilities.

Pros & Cons

Pros

• Monitors flow, pressure and temperature constantly to give a detailed picture of water use.
• Automatic shutoff can prevent catastrophic water damage by stopping supply when issues are detected.
• Detects extremely small leaks, down to about one drop per minute, without additional sensors.
• The app provides timely alerts so issues can be assessed and managed remotely.

Cons

• Requires installation on the main 1-in pipe, which can mean a professional install for some homeowners.
• Relies on the companion app for full functionality, so users who avoid smart apps get diminished value.

Specifications

Product	Flo Smart Water Monitor and Automatic Shutoff Sensor
Pipe size	1-in diameter main supply line
Monitoring	Water flow, pressure and temperature
Leak sensitivity	Detects leaks as small as one drop per minute
Controls	Automatic shutoff and mobile app alerts
Installation location	Main water supply line of the home

Our Verdict

The Flo Smart Water Monitor and Automatic Shutoff is a practical investment for homeowners who want active, app-driven water protection at the main line. It delivers continuous monitoring, granular live data and an effective automatic shutoff to reduce the risk of water damage, making it good value for properties where water loss would be costly.

Frequently Asked Questions

Where is the Flo monitor installed?
The unit is installed on the home's main water supply line, sized for a 1-in diameter pipe.

How small a leak can it detect?
It is designed to detect very small leaks, as small as one drop of water per minute, without additional sensors.

What information does the app provide?
The Moen Smart Water App shows live water flow rates, pressure and temperature and sends alerts if the system detects high pressure, freezing water, or leaks.