Moen Flo Review 2026: FloSense AI Leak Detection With an Automatic Shutoff

Updated November 2, 2026 – Tested Intelligence

Quick verdict: The Moen Flo Smart Water Monitor and Shutoff is a single device a plumber cuts into the main water line that learns the home’s water footprint, runs daily leak health tests, and can close its own valve when a leak turns serious. For plumbing shops it is a clean, brand-name install product — with one catch customers must hear up front: Moen’s own help center says alerts and automatic shutoff only switch on after a 7-day learning period.

What it is

Moen Flo (models 900-001 for 3/4-inch, 900-006 for 1-inch and 900-002 for 1-1/4-inch lines) installs in one place on the main cold-water line and monitors the whole home from there — no puck sensors scattered around the house. It continuously tracks flow rate, pressure and temperature, and its FloSense technology learns the unique water footprint of the home: what normal showers, laundry, irrigation and flushing look like, so irregular flow stands out.

MicroLeak technology runs daily health tests that can identify leaks as small as a single drop per minute. When Flo spots a problem, it alerts the homeowner by app, phone call and email, and the valve can be closed remotely from the app — or automatically, once the system knows the home well enough to judge.

Key features

• FloSense learning: builds the home’s water footprint over a 7-day Learning Mode, then keeps learning as habits change
• MicroLeak daily health tests: pressure-based checks that catch leaks as small as one drop per minute
• Automatic and remote shutoff: the integrated valve closes on a serious leak, or from the app anywhere
• Real-time alerts by app, phone call and email, with live flow, pressure, temperature and usage history in the app
• Home, Away and Sleep modes tune sensitivity for occupancy and long, deliberate water use
• Works with Amazon Alexa, Google Assistant, Ring and Control4; keeps protecting on locally stored learnings if Wi-Fi drops

Pricing

Moen lists the Flo Shutoff at $623.99 for the 3/4-inch model, $675.99 for 1-inch and $1,039.99 for 1-1/4-inch, and retailers routinely discount below list — Abt, for example, listed the 3/4-inch at $559 when checked in November 2026 (retailer figure). The app is free and, per Moen’s own FAQ, there is no monthly fee to operate the device or access its features. Professional installation is recommended and is extra.

What the pricing page doesn’t make obvious: the one-year warranty is short for a device plumbed into a main line. The optional FloProtect subscription, at $5 per month, is what extends the warranty to five years and adds deductible reimbursement and proactive monitoring. Budget for it — or tell the customer plainly that year two onward is uncovered. The second gotcha is bigger: Moen’s help center states that certain features, including alerts and automatic shutoff, are enabled only once the 7-day Learning Mode completes. The home is monitored from day one, but the headline automatic protection is a week away, so set that expectation at install, not after the first alert that never came.

Who it’s for

Residential plumbing shops that want a big-brand leak-protection install for existing customers: finished basements, second homes, older housing stock and anyone who has already paid for one water-damage cleanup. Moen’s brand does half the selling.

Who should skip it

Compared head-to-head with Phyn Plus, reviewed here earlier, Flo costs more at list ($623.99 vs Phyn’s $499 launch MSRP) and its extended warranty sits behind the $5/month FloProtect plan, while Phyn charges no subscription at all. Commercial work is also out of scope: Flo tops out at 1-1/4-inch residential lines, and larger buildings need an enterprise system such as Wint.

Pros

• One device watches the whole home and can shut the water off by itself
• Daily MicroLeak health tests catch drip-scale leaks, not just bursts
• No subscription required: full app features are free, per Moen’s FAQ
• Three sizes cover the common residential main-line range
• Moen dealer and parts network behind a device that lives on the main line

Cons

• Alerts and automatic shutoff wait for the 7-day Learning Mode to finish
• One-year base warranty; five years requires the $5/month FloProtect plan
• Detects that a leak exists, not where — diagnosis is still the plumber’s job
• Needs 2.4 GHz Wi-Fi and AC power at the install location
• List prices run above key rivals, and installation is on top

FAQ

How does FloSense detect a leak?

FloSense learns the home’s normal water footprint over a 7-day Learning Mode and keeps adapting afterwards. Flow that does not match the learned pattern triggers an alert, and the daily MicroLeak test checks the closed system for leaks as small as a drop per minute.

Does Moen Flo require a subscription?

No. Moen’s FAQ says there is no monthly fee to operate the Shutoff and all app features are included. The optional FloProtect plan at $5 per month adds proactive monitoring, deductible reimbursement and extends the warranty from one year to five.

Is the home protected the day Flo is installed?

Only partly. Moen’s help center says certain features, including alerts and automatic shutoff, are enabled once Learning Mode completes — about 7 days of normal water use. Plumbers should tell customers this at install so the first week is not mistaken for full automatic protection.

Bottom line

Moen Flo earns its place on the truck because it pairs genuine learning-based detection with the one feature that limits damage: a valve that closes itself. Quote it with eyes open — FloProtect for the warranty, a week of learning before full protection — and it is a product a residential shop can stand behind.