Moen Flo Smart Water Shutoff: Automatic Leak Protection for NH Homes
The Moen Flo Smart Water Shutoff is a whole-home water leak detection and automatic shut-off system installed at your main water line. It monitors flow and pressure continuously, learns your home's normal water use patterns, alerts you via app when something is wrong, and can shut off the main valve automatically when a serious leak is detected. For southern New Hampshire homeowners, the Flo has become one of the most reliable single-product defenses against catastrophic water damage.
At A.J. LeBlanc Heating, our licensed plumbers install Moen Flo systems across NH.
How the Moen Flo works
The Flo device installs on the main water supply line, typically just inside the home where the water enters or near the water meter. It contains:
- A motorized ball valve that can close the main water supply
- Pressure, flow, and temperature sensors
- Wi-Fi connectivity for the Flo by Moen app
After installation, the device spends roughly two weeks learning your home's normal water use patterns. After the learning period, it can distinguish a normal water event (a shower, a dishwasher cycle, irrigation) from an abnormal one (a continuous flow that does not match any known pattern, a slow drip running 24/7, a sudden pressure drop).
Key features
Proactive leak detection
The Flo monitors continuously, not just when something obvious is wrong. Slow leaks at fixtures, dripping toilets, and undetected appliance issues all show up in the app's analytics. Many homeowners catch a leaky toilet flapper they did not know existed.
Automatic shut-off
If the device detects a serious leak (continuous high-flow event that does not match any normal pattern), it can automatically close the main water valve. Auto Shutoff is configurable; some homeowners run with it always on, others enable it only when the home is empty.
Real-time alerts
The app notifies your phone when anomalies are detected. You decide whether to shut off the water remotely, dismiss the alert, or investigate.
Daily health tests
The Flo runs a brief diagnostic each day that pressurizes a portion of the plumbing and watches for pressure decay. This catches very slow leaks that might otherwise go undetected for months.
Freeze prevention
The temperature sensor alerts you if the water in the pipes is approaching freezing, useful for NH homes during deep cold snaps or when traveling in winter.
Water usage analytics
The app shows daily water use by category, helping homeowners identify high-use fixtures and conserve water.
Smart home integration
Works with Amazon Alexa, Google Home, and IFTTT.
Where the Flo matters most in NH homes
- Homes with finished basements: highest-payoff installation. A water heater failure in a finished basement is a 5-figure disaster.
- Homes with significant water-using appliances: washing machine, dishwasher, ice maker, multiple bathrooms.
- Seasonal or second homes: NH lake houses that sit empty for weeks at a time are prime candidates for whole-home shut-off.
- Older homes: aging plumbing where a sudden pipe failure is more likely.
- Homes where the owners travel frequently: peace of mind that the water can be shut off remotely from anywhere.
Installation
A Moen Flo installation involves:
- Identifying the main water supply line entry point
- Cutting the line and installing the Flo device inline (typically a few hours of plumbing work)
- Connecting to a standard 120V outlet (or hardwiring near the meter)
- Configuring Wi-Fi and pairing the device to the app
- Walking the homeowner through the app and alert settings
Installation must be performed by a licensed plumber in most NH municipalities because it involves cutting and re-piping the main water line.
Insurance discount potential
Many homeowner's insurance carriers now offer premium discounts for homes with smart water shut-off systems installed. The discount reflects the reduced claim risk. Check with your insurance agent before installation; some carriers require specific brands or features to qualify.
Schedule a Moen Flo installation
If you are replacing a water heater, finishing a basement, leaving for an extended trip, or just want serious peace of mind that a slow leak or burst pipe will not destroy your home, contact A.J. LeBlanc Heating. Serving New Hampshire families since 1928.
Frequently Asked Questions
How does Moen Flo detect a leak?
It monitors flow, pressure, and temperature on the main water line. After a learning period, it recognizes your home's typical usage and flags abnormal events. Higher-flow leaks are detected within minutes; slow leaks (a dripping faucet, a running toilet) show up in the analytics over days.
Will the Flo shut off the water during a normal shower?
No. The learning period teaches the device what normal household water use looks like. Showers, washing machines, dishwashers, and irrigation are all recognized.
What happens if the power goes out?
The Flo holds its last valve position when power is lost. If the valve was open, it stays open; if it was closed, it stays closed. The device does not include battery backup for the valve actuator.
Can I install it myself?
Installation involves cutting and re-piping the main water line, which is plumbing work that requires a licensed plumber in most NH municipalities. DIY installation also frequently voids the unit's warranty.
How much does Moen Flo installation cost?
Equipment and installation typically range from $800 to $1,500 depending on the home's existing plumbing configuration. The first averted flood pays for the system many times over.