Moen Flo Smart Water Shutoff — Installation in Los Angeles

What is Moen Flo?

Moen Flo (also called Flo by Moen) is a smart water monitor and automatic shutoff valve that installs on the main water supply line to your home — the single point where all your water enters. Because it sits there, it can see and control every drop of water in the house.

Think of it as a smoke detector for water, except it does not just warn you — it can turn the water off by itself. A burst washing-machine hose or a pipe that fails while you are away can dump hundreds of gallons an hour into your home. Flo is designed to catch that and stop it before it becomes a catastrophe.

How it works

Flo has three sensors that continuously monitor your water: flow rate, pressure, and temperature. Its FloSense algorithms learn what normal looks like in your specific home — how much water a shower uses, when the irrigation runs, what the dishwasher draws — and then watch for anything that does not fit the pattern.

• It detects leaks as small as a drop per minute. Not just burst pipes — the slow, hidden leaks behind a wall or under a slab that quietly rot a house for months. In LA, slab leaks are one of the most common and most expensive of these.
• Every night it runs a health test, briefly pressurizing your system and watching how it holds, to find leaks anywhere in the plumbing before they grow.
• When it sees a problem, it can shut the water off automatically — a running toilet that will not stop, an abnormal continuous flow, a catastrophic burst — and alert you at the same time.
• You stay in control from your phone. The app shows real-time usage, flow, and pressure, and lets you shut the water off or turn it back on from anywhere.

Key features

Why it makes particular sense in Los Angeles

• Slab foundations. A huge share of LA homes are built on concrete slab, and a slab leak — a supply line failing under the foundation — can run for weeks before you see a warm spot or a spike in the bill. Flo catches the abnormal flow long before the damage surfaces.
• Aging supply lines. Much of LA housing predates 1960, with copper and galvanized lines well past their prime. Pinhole leaks in old copper are common on the Westside and in the older neighborhoods, and Flo surfaces the slow ones early.
• Water is expensive and scarce here. Southern California water is costly and supply is tight. A hidden leak is both a big bill and wasted water in a region that cannot spare it. Flo shows you usage you would never otherwise see.
• Second homes, rentals, and income property. LA has a great deal of rental property, ADUs, and homes owned by people who travel. A leak in an unoccupied unit runs for days. Flo shuts it off in minutes and calls you.
• Earthquakes. A quake can crack a supply line. Flo watches for the abnormal flow that follows and can shut the water down while you are dealing with everything else.

Insurance discounts

This is the part that often pays for the device. Because water damage is one of the most common and expensive home insurance claims, many insurers now offer discounts — and in some cases direct incentives — for a professionally installed smart shutoff like Flo.

• Several major carriers — names that come up include Mercury, Farmers, State Farm, and Liberty Mutual — are known to offer discounts on the water-damage portion of a homeowner’s policy for installing a smart leak-prevention device.
• Some programs go further, contributing toward the cost of the device or the install, or reimbursing a portion of your deductible on a water claim.
• Most insurers require the device to be installed by a licensed plumber to qualify — which, since Flo goes on the main line and involves real plumbing, is exactly how it should be done anyway.

What installation involves

Flo installs on your main water line, typically where the line enters the house — in an LA home that is often the garage, an exterior wall, or near the meter. It is not a plug-in gadget — it is a valve spliced into your main supply, and on many homes it involves cutting pipe and soldering. That is precisely why it should be a licensed plumber, and why a professional install is what keeps the warranty and the insurance discount valid.

1. We find the right spot. On the main line, after the meter and any pressure regulator, with room to work and power or Wi-Fi in reach.
2. We shut down and splice in the valve. The main is turned off, a section is cut out, and the Flo unit is fitted and sealed.
3. We pressure-test and check for leaks. Every joint is confirmed sound before we leave.
4. We connect it to your Wi-Fi and the app, and let it begin learning your home’s normal usage.
5. We walk you through it — alerts, remote shutoff, and what the health tests mean — so you are comfortable using it.

A note on the warranty: Moen’s limited warranty can be voided by improper installation. A licensed install protects both the device and your claim if you ever need it.

Cost and rebates

The device itself is a few hundred dollars at retail, and a professional install typically brings the all-in figure into roughly the $600–$900+ range depending on your plumbing — older homes and tight main-line access sit at the higher end. Two things offset that:

• Insurance incentives can cover part of the cost outright, and the ongoing policy discount adds up year over year.
• Water utility and manufacturer rebates come and go — worth checking with LADWP or your local water provider and with Moen at the time you buy.

We will give you a firm install price for your specific home before any work starts. If you want, buy the unit yourself and we will fit it, or we can advise on which bundle suits you.

Frequently asked questions