Smart Water Shutoff & Leak Detection
A Burst Pipe Doesn't Have To Flood Your House.
Serving the San Gabriel Valley, Greater LA & surrounding areas. Automatic leak detection that shuts your water off before the damage starts. Licensed, insured, owner-operated.
✓ CA C-36 Licensed & Insured
✓ Same-Day Service Available
✓ Free Estimates
✓ Owner-Operated
✓ Se Habla Español
Why Smart Shutoffs Are Worth It in Older SoCal Homes
A supply line under a sink fails at 2am and nobody finds it until morning. A slab leak runs for weeks before anyone notices the bill. A washing machine hose lets go while you're on vacation. Water damage is the single most common homeowner insurance claim, and the average one runs into five figures — most of it from water that ran unnoticed. A smart shutoff sits on your main line and watches how water actually moves through your house. When it sees a flow pattern that shouldn't be happening — a steady trickle at 3am, or a sudden rush that doesn't stop — it closes the valve automatically and sends an alert to your phone. A lot of San Gabriel Valley homes were built in the 1920s through the 1950s with galvanized or early copper supply lines, and that's exactly the plumbing that fails without warning.
What We Install
Flo by Moen Smart Water Shutoff
Flo by Moen is the system most homeowners are installing, and for good reason. It mounts on your main water line and runs a daily automatic pressure test to catch leaks as small as a drop per minute — the kind you'd never find on your own until it turned into a repair. If it detects a real problem it shuts the water off by itself, and you get the alert on your phone whether you're home or in another state. We install the unit, handle the plumbing tie-in, and get it connected to your wi-fi and app before we leave.
Whole-Home Leak Detection Sensors
Sensors placed at your water heater, under sinks, behind the washer, and near the dishwasher catch water where it actually shows up first. They talk to the main shutoff, so a puddle under a bathroom vanity can trigger the whole house to close. We place them based on where your plumbing actually runs, not just a generic list.
Main Shutoff Valve Replacement
A smart shutoff is only as good as the plumbing it's mounted on. A lot of homes we open up have a corroded gate valve at the main that hasn't turned in twenty years. If yours is in that shape we'll tell you before we install anything, and replace it with a proper full-port ball valve so the system has something solid to work with.
Trusted Brands We Install
We install Flo by Moen, Phyn, Moen, and Watts smart water systems, plus standard NIBCO and Apollo full-port ball valves on the main. Flo by Moen is what we recommend for most homes — it has the widest insurance recognition and the app is the easiest one for homeowners to actually use. We handle the complete installation: the plumbing tie-in, a proper section of pipe cut and prepped, wi-fi pairing, app setup, and a walkthrough so you know what the alerts mean before you get your first one. We also install customer-supplied units if you've already bought one.
What To Expect
Every smart shutoff installation starts with a free in-home assessment. We look at where your main line enters the house, check the condition of your existing shutoff valve, confirm you have wi-fi that reaches the install location, and give you a flat-rate price before we start. Most installations take two to three hours. We cut in a section of pipe, mount the unit, restore water, pair it to your wi-fi, and run a full test cycle with you standing there. Before we leave, we walk you through the app — what a normal reading looks like, what an alert means, and how to turn your water back on from your phone if you ever need to.
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Call or Text
Free in-home estimate scheduled within 24-48 hours
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Upfront Quote
We check your main line and shutoff valve condition
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Same-Week Install
Professional Install — Most systems installed in a single visit
Smart Water Shutoff Installation Across the San Gabriel Valley
Premier Flow Plumbing serves homeowners across Pasadena, San Marino, Arcadia, La Cañada Flintridge, South Pasadena, Altadena, Sierra Madre, Monrovia, San Gabriel, Alhambra, Temple City, Rosemead, Glendale, La Crescenta, and surrounding San Gabriel Valley communities. If you're worried about water damage while you're away, or you've already had one leak you didn't catch in time, give us a call — we'd love to come out and look at your setup.
Frequently Asked Questions
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Many carriers offer a discount for an automatic water shutoff, and some will waive part of a deductible on a water claim if one is installed. It varies by carrier, so call yours and ask about a "water leak mitigation device" discount before you install. We're happy to provide the model and serial number for your paperwork.
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On your main water line, after the meter and typically where the line enters the house — often in a garage, a crawlspace, or an exterior wall. It needs to be indoors or well protected, and it needs power and wi-fi reach. We confirm all of that during the assessment.
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The valve holds its last position, so your water stays on. Flo by Moen units have a battery backup for short outages, and the system reconnects on its own when service returns. You can also open and close the valve manually on the unit itself.
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It learns your household's normal usage over the first couple of weeks, and you can adjust sensitivity in the app. In practice, false shutoffs are rare — and if it does close, you reopen it from your phone in a couple of seconds.
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Yes. We install customer-supplied smart shutoffs. We'll confirm the unit matches your pipe size and main line configuration first.
Protect Your Home Before The Next Leak.
Get a free in-home assessment from a licensed, owner-operated plumbing company. We'll look at your main line, check your existing shutoff, and give you a straight answer on whether a smart system makes sense for your house — and which one. Call or fill out the form below.