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Store SKU #1003288152

Leak Prevention System with 1 Leak Detector

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Product Overview

Save yourself thousands of dollars in water damage by using the Guardian Leak Prevention System. Whether you're worried about a broken washing machine, an overflowing sump pump or a leaking water heater, Guardian has your back. Install the Guardian Valve Controller over your existing metal quarter turn ball valve (from -1) in minutes without any tools or pipe cutting and place the Guardian Leak Detector near any fixture that might leak. The moment the Leak Detector senses water, extreme cold or an earthquake, it will automatically shut off your water main to prevent further damage and you will receive a notification on your phone via the Guardian app. The Valve Controller has an optional battery backup and works without the internet, so it will protect your home even without electricity or internet. The wireless Leak Detector can be placed up to a 1000 ft. away from the Valve Controller, to cover even the largest homes and their batteries last for up to 15-years. Over a 100 additional Leak Detectors can be added to protect properties of any size. The Valve Controller will test your valve every week to make sure it is working properly during an emergency and will alert you if anything goes wrong. The system includes a Valve Controller, a Leak Detector and 2 Remote Sensors that plug into Leak Detectors to extend it to hard to reach areas. Use the free iOS and Android app to configure your system and monitor or control it from anywhere, with no monthly fees or other equipment.
  • Install in minutes and never worry about water damage again, Guardian will automatically close your water main when the leak detector senses leaks, freezing temperatures, or earthquakes
  • Valve controller easily installs over existing quarter-turn metal ball valve from - 1 without any tools, for indoor use only
  • Leak detector can be placed up to a thousand feet away (line of sight) from the valve controller, and they include a 15-year battery
  • Leak detector senses water using 5 different points of detection to provide installation flexibility, use to monitor toilets, basement doors, sump pumps, water heaters, appliances, sinks, drains, and more for leaks and floods
  • Use the iOS and Android app, with no monthly service fees, to monitor and control your system from anywhere in the world
  • Contact your insurance provider for rebates and premium discount incentives for protecting your home with Guardian
  • Click here for more information on Electronic Recycling Programs

Info & Guides

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Inlet Diameter (In.)
Inlet Size
Outlet Diameter (In.)
Product Depth (in.)
3.5 in
Product Height (in.)
6 in
Product Length (in.)
8.75 in
Product Width (in.)
3.5 in
Valve Inlet Diameter (in.)


Rough-In valve
Color/Finish Family
Compatible Pipe Material
Compatible Product
Lead Free,Mounting Bracket Included,Quarter Turn,Removable
Inlet Fitting End Type
Push to Connect
Cast Metal
Maximum Pressure (psi)
Maximum Working Temperature (F)
Outlet Fitting End Type
Push to Connect
Pack Size
Power Options
Product Weight (lb.)
3.5 lb
Remote Access
Remote Access
Requires Hub?
No Hub Required
Smart Home
Smart Home Enabled
Smart Home Protocol
Stop Valve Type
Valve Configuration
Valve Connection
Valve Type
Supply Stop
Voice Control Hub Required
No Voice Control
Works With
Proprietary App

Warranty / Certifications

Manufacturer Warranty
One Year Limited Warranty

Questions & Answers

Typical questions asked about products:

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Customer Reviews

  • 3.9
    out of 54 reviews
  • 72% recommend this product
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Showing 1-10 of 54 reviews
Possible Solution if you can't get it to work. This product works great once you get it to work,...
Possible Solution if you can't get it to work. This product works great once you get it to work, but I initially had the same frustrating issues that many of the other reviewers commented on but was able to get it to work after a few tries. Some of the issues I encountered when trying to setup were, 1) not recognizing my WIFI, 2) After calibration it wouldn't go to the next step to allow me to add the leak detectors to the app, 3) Just overall frustrating initial setup with mobile app and poor instruction guide. Both could use a lot of improvement. So both of the main issues I had were resolved by powering down the device (including removing battery backup if you have it installed) and then powering it back up and restarting the process. After I got it to recognize my wifi the biggest frustration I had was the mobile app wouldn't go to the next step of allowing me to add the leak detectors, but after giving up the first night, the next morning I powered down the device and restarted it and then restarted the app and it then went to the next step allowing me to add the leak detectors/sensors. I use an android device. Once I got to the point where it would allow me to add the leak detectors/sensors it was smooth sailing and I got it all setup and it now works great. Will likely buy more sensors for my upstairs bathroom. Also, as you can see from my photo, I installed mine upside down since I didn't have enough room above the copper water line and it works great.
by bjen503
1 person found this helpful
I received the Water Valve Shut off with Leak Detectors for review. This product was shipped to m...
I received the Water Valve Shut off with Leak Detectors for review. This product was shipped to my home in a well packaged box and arrived in an undamaged condition. I really like the peace of mind that this product provides me when i am on vacation or away from my home. This product was so easy to install on the water line with no cutting of pipes.The instructions provided were easy to follow. You just clamp in place over your ball water valve and plug everything in and your ready to go.I also like the optional battery backup in case of power loss. Well thought out product.
6 people found this helpful
Guardian Valve Controller My gadget of the week. What a clever and simple to install system that brings great peace of mind. The system consists of a manual valve shut off actuator that is sensor activated and then sends a message to your phone or tablet. But that’s the short description this system checks off all the boxes in leak detection products. I can’t say enough about their tier two customer service personnel. My system would not reach the actuator correctly which rendered the system inoperable but after a few minutes on the phone with this cheerful and informative operator he suggested I put a small washer behind my valve handle which allowed proper contact with the actuator. Problem solved. Setting up the sensors was a breeze and everything thing works the way it’s designed to. Had a problem with their cloud control sending alerts to my phone but my customer service tech took care of that on his end. Great product coupled with great service.
by Granny
2 people found this helpful
No Plumber Needed for this Leak Prevention Kit. This kit comes in a neatly packed box with a s...
No Plumber Needed for this Leak Prevention Kit. This kit comes in a neatly packed box with a suitcase handle. The kit contains the following: • Guardian Valve Controller • A/C Power transformer and cords • Water Detectors (3) • Remote Sensor Probes (2) • Set-Up Guide I had been looking for an automatic shutoff valve for some time and this one is the best that I have been able to find at such a price. The listed $399.00 USD for this kit may seem a bit steep, but if you factor in at least $200 USD for a plumber to install, then it is very reasonable. It is definitely a DYI kit. The Controller is ready to install right out of the box. Fit it to your required ball type valve, tighten the clamps, plug in the power supply, then download the Guardian App (free) and it will guide you through the installation and calibration. Both were very easy. You will need an iOS or Android Smartphone with Bluetooth and internet access. You also need WiFi with internet access (for remote notifications and control only). The system works as advertised without WiFi. The set up guide in the box is very simple but lacks narrative for understanding the events of the installation app and the various steps. You need to go the GetGuardian.com website for more extensive help. I did call the support number and got a live person quickly and they helped me through the installation process quickly. I had a bit of difficulty connecting to my network as it has 2-channels 2.4 GHz and 5.0 GHz. The app works only with the 2.4 Ghz. Once connected the intuitive app made the calibration quick and easy and then adding your sensors is easy. For my testing, I placed one sensor in my bathroom then added a few drops of water to the cupped device and the main water valve shut off quite quickly.
by capnbobby
9 people found this helpful
No motor calibration mechanism, wireless leak detector doesn't work, wi-fi setup only on 2.4 GHz
There is no motor calibration mechanism, so that if the motor or handle doesn't line up there's no option to fix it? The wireless leak detector doesn't work at all. The "new app", version 1.1.12 recognizes it but temperature and wet/dry condtion don't work. The wi-fi setup will only work on a 2.4 GHz wireless network, not 5 GHz and there's no info. on packaging or instructions to tell you that. I spent way too much time trying to set up the wifi and had to discover this by trial and error and pure luck in "guessing" this may be the case. The wired sensor works great, but I want more than just one location to detect the leak. Their app is going through a brand-new complete "overhaul" of their app and backend services. So you have to guess which app to download for iOS, it's 1.1.12 of the app not version 2.x (older version). I will likely be returning this since the wireless leak detector feature was a key decision in buying it. Also, it is advertised as working for "earthquakes" / seismic events. I couldn't figure out a way to test this feature. I tried shaking it when off the shutoff valve and nothing happened?
by atom88
After many emails to company I received a new controller. I could not get the initial controller ...
After many emails to company I received a new controller. I could not get the initial controller to work and after many attempts they sent me a new one. The second one worked on the first try. The device only turns the water off. You have to manually (button on the controller) turn on the water. Saved me hundreds of dollars on homeowners insurance.
by bravo
Terrible product
I am a very mechanical and technical person, and cannot get this thing to operate. The app is horrendous. It fails to calibrate and will overturn your valve handle, leaving your with a twisted-up, if not totally broken valve. If you insist on trying this, DO NOT install it on your main water shut-off valve. It could damage the valve. leaving you without a way to shut the water off. Install a second valve just beyond your main; however, is will be easier just to take my advise and do not buy this piece of junk!
by andyp
2 people found this helpful
After a three level flood in my house, I feel...
After a three level flood in my house, I feel a lot better having a system to prevent that from happening again. The system was relatively simple to set up. Definitely would/have recommended The Guardian!
by SeanD
Works well. App could use some work. ...
Works well. App could use some work.
by HomeDepotCustomer
works as expected, but....
One month in this product works as expected. However, it was extremely difficult to get it operational. The Guardian customer service staff is knowledgable and helpful but they don't respond sometimes until the next day or even longer. They do not allow any phone conversations so diagnostics is very slow and cumbersome. The first one I purchased had to be returned directly to the manufacturer for a firmware update?? The one they shipped me still had issues with bluetooth connectivity and also with wifi. Over multiple phons calls we got it all fixed. Fingers crossed!
by David
1 person found this helpful
Showing 1-10 of 54 reviews