Best Automatic Water Shut-Off Valves 2021

Looking for the best automatic water shut-Off valves? If yes, you are on the right place. Today in this guide we are going to discuss some best water shut off valves in deatils.

A friend of mine was out of town for a week for work. When he got back, he saw that his water tanks weren’t even close to full, and he’d had no idea because he wasn’t home. He also lived in an area where there was hardly ever a shortage of water. It took my friend a couple of days to find the culprit – an underground leak. He had to shell out a fortune to get it fixed. He didn’t want this to happen ever again, so I got to work.

Researching the web, I came to realize that an automatic water shut-off valve would’ve come in handy for my buddy. There was a lot to consider before thinking of making a purchase. The factors I considered before making my selections were Ease of Installation, Response Time, Leak Sensors, and Tech Support.

Top 6 Best Automatic Water Shut-off Valves in 2021:

  1. Moen 900-002 Flo Smart Water Shut-Off ValveMost Extensive Smart Home Ecosystem Compatibility
  2. LeakSmart Automatic Water Shut-Off ValveBest Price to Performance Ratio
  3. Dome Water Shut-Off ValveBest Budget Automatic Water Shut-Off Valve
  4. WaterCop Z-Wave Smart Water Shut-Off ValveMost Robust Water Shut-Off Valve
  5. Phyn Plus Smart Water Shut-Off ValveBest Automatic Water Shut-Off Valve
  6. Grohe Smart Water Shut-Off ValveMost Utilitarian Water Shut-Off Valve

Reviews Of Best Automatic Water Shut-Off Valve.

Best Automatic Water Shut-Off Valves

1. Phyn Plus Smart Water Shut-Off Valve – Best Automatic Water Shut-Off Valve.

Phyn Plus Smart Water Shut-Off Valve - Best Automatic Water Shut-Off Valve


The Phyn Plus Smart Water Shut-Off Valve keeps your main water supply line safe and prevents leaks from wasting water. The company claims that changes in water pressure is measured 240 times in one second.

You can control it through the Phyn app, which is very user-friendly and has a very attractive layout.

The most commonly reported issue with Automatic Shut-Off Valves is false alarms. Nobody gives a second thought when in need of a quick shower. And at these critical moments, false alarms cause interruption. Phyn’s great AI algorithm refines itself and learns your usage behavior.

This the primary reason why it’s at the top of this list.

The Phyn Plus smart water shut-off valve does indeed provide a great advantage as its setup is just a one-time thing. It is an Integrated valve controller, and hence you won’t have to set up sensors at various spots in your building to support the actuators.

The interfacing application is also top-notch, with a rating of above four stars on popular shopping websites. Phyn Tech Support are a cheerful bunch, which will help you with just about anything.

One small disadvantage to point out is the length. The device is more than 10 cm long, which is twice the size of the other ones mentioned in this article. So the user should think about the placement of this device at a position where its dimensions won’t be an issue.

2. LeakSmart Automatic Water Shut-Off Valve – Best Price to Performance Ratio.

LeakSmart Automatic Water Shut-Off Valve

The LeakSmart Automatic Water Shut-Off Valve has three variants based on the pipe dimensions – the 1 inch, 1.25 inches, and 0.75 inches models. This is extremely useful as you could find a suitable one for almost all the supply lines in your residential or commercial block.

The valve brings premium features at a non-premium price point. LeakSmart works with different home automation platforms. Some of the most popular ones that enhance control are the Nest, WINK, and SmartThings.

LeakSmart claims to be able to shut down the faulty line within five seconds after detections.

The device has a black land grey texture with a green-and-red LED display, which suits the body well.

Before you can start using the valve, you’ll have to integrate a LeakSmart Hub and a LeakSmart Sensor with the device. You can also operate the entire network with the Leaksmart application, which also is well rated.

3. Moen 900-002 Flo Smart Water Shut-Off Valve – Most Extensive Smart Home Ecosystem Compatibility.

Moen 900-002 Flo Smart Water Shut-Off Valve

The Moen 900-002 Flo Smart Water Shut-Off Valve builds upon its predecessor, the 900-001. It is available in 1, 1.25, and 0.75-inch models. Moen Flo smart is priced a bit on the higher side compared to the other options on the list. They would also ask you to pay 5 dollars a month for availing most features under the FloProtect subscription.

The Moen 900-002 is operated using their Flo app. The application is easy-to-use, which is essential when considering a smart device. The MicroLeak Technology feature claims to be able to detect even a drop of water being wasted because of faults or unevenness. The product is compatible with Alexa and Google Assistant without needing a smart hub.The company provides smart water detectors at around 125 USD that you need to integrate with the device before it can be used.

4. Grohe Smart Water Shut-Off Valve – Most Utilitarian Water Shut-Off Valve.

Grohe Smart Water Shut-Off Valve

The Grohe Smart Water Shut-Off Valve is a very light-weight controller that is available in just one variant. Yes, unlike the other two mentioned earlier, Grohe is for 1-inch pipes. The Grohe comes at a price of around 570 USD. The device operates at 110 V US standards. The device is automated using the ONDUS application, which is compatible with iOS and Android operating systems.

The device is a bit longer than its competitors, so carefully consider the valve placement and pipe-clearance before purchase. The company also provides a 2-year warranty.

5. WaterCop Z-Wave Smart Water Shut-Off Valve – Most Robust Water Shut-Off Valve.

WaterCop Z-Wave Smart Water Shut-Off Valve

You have to buy all sensors and other plumbing materials in addition to the device. In total, you could set up an automated water shut-off system at around 500 USD, which is almost the same pricing when compared to its competitors. The device works on Z- wave, which you can think of as “Wi-Fi, but not really”. It comes as a 1.25-inch variant only.

This is what makes it a heavy-duty control and shut-off valve, as it’s designed for heavy flow-rates. The device works with smart interfaces like Smartthings, Homekit, Vera, etc. Voice control is possible via Z- wave compatible hubs alone and does not normally support Alexa.

6. Dome Water Shut-Off Valve – Best Budget Automatic Water Shut-Off Valve.

Dome Water Shut-Off Valve


The Dome Water Shut-Off valve is most sought for, for its comparatively lower pricing. The entire equipment set is priced below 100 USD. An installation video described the device to be set up on a pipe with a bracket that provides the controlling torque. The device torque is based on the sensor placed at desired positions.

The sensor has three projections on one side that detect the water when it flows over the sensor. Even though it is an appealing device, it has a few drawbacks. One of the most commonly raised issues is its inability to provide the required controlling torque and thus failing to serve the purpose of purchase when in most need.

Buyer’s Guide – Best Automatic Water Shut-Off Valve.

Best Automatic Water Shut-Off Valve

All shut-off valves basically work based on one or two or sometimes three main parameters. The most common working principle is the variation in water pressure along the supply line that carries it throughout the building,

Once the device detects a sudden fluctuation in water pressure, it initiates the emergency shut-off procedure. This is where most automation is made available. A sensor detects the change. It alerts a controlling application and nudges an actuator. The actuator finally provides a controlling torque that shuts down the flow along the faulty or uneven path.

Sensor Accuracy:

The better the sensor accuracy, the fewer the false alarms. You don’t want to be actually using a large amount of water just for the valve to shut it off. For example, if you’re hosing the garden traditionally instead of getting smart sprinklers or taking a long shower. It would also be great to have AI algorithms that learn your usage patterns to better differentiate between heavy legitimate use and a leak in a pipe somewhere. This is definitely worth a bit of extra cash for the peace of mind it gives you.

Actuator Response Time:

Once the sensor has accurately detected a leak in a pipe somewhere, you want the water to be shut off as soon as possible to minimize wastage. This is where actuator response time comes in. It’s just a measure of how quickly the valve closes after the sensor detects a leak. Naturally, the lower this is, the better, and it’s worth spending for if your water system has a large Flow Rate.

User-friendly App:

When dealing with a complicated issue, you want all the information presented to you in the quickest and most easily-understandable manner. You want to be able to navigate to the features you use the most in a streamlined fashion. All this means is you need a companion app that’s easy to use. It’s definitely worth a bit of extra money.

The water temperature is also used as a measurement parameter. The temperature is sensed, and the shut-off procedure is actuated for low temperatures as pipes may break when water freezes during winter. Thus more the number of sensors and sensing parameters, the smarter the device.

Final Words

Taking that extra step to saving water will not only put your mind at ease, but it also makes the world a better place. Not to mention the extra stacks that you’d have to spend on fixing broken pipes, check for small leaks and improper flow at bends, etc.

If nothing but the best will do, consider the Phyn Plus Automatic Water Shut-Off Valve. If you’re looking for a no-frills option that gets the job done, maybe the Grohe Automatic Water Shut-Off Valve is what you’re looking for. Go with the LeakSmart Automatic Water Shut-Off Valve for the best price-to-performance ratio.

If you’re a Smart Home nerd like me and want something with extensive compatibility that’ll integrate with most automation platforms out there, look no further than the Moen 900-002 Flo Smart Water Shut-Off Valve. If you’re looking for something that can take a beating and some rough use, go for the WaterCop Z-Wave Smart Water Shut-Off Valve.

If you’re on a budget, The Dome Automatic Water Shut-Off Valve is what you’re looking for. Thanks for reading this post on To explore more such products do follow us and stay tuned.

Frequently Asked Questions Related To Best Automatic Water Shut-Off Valves.

What is an automatic water shut off valve?

An automatic water shut-off valve provides an automatic actuation torque that shuts valves in a water supply line based on various sensor parameters like water pressure, temperature, turbulence, etc.

Do water shut off valves go bad?

Water shut off valves can go bad based on the frequency of usage and the operational environment. You can take care of this by manually checking the working condition along with the other water flow lines.

Should water valves be fully open?

The amount or portion of the valve that is open depends on the type of valve. Gate valves and ball valves are fully open. But some valves like butterfly valves and pressure-reducing valves work in a half-open mannerism as well. It all depends on the area or location of the valve in the supply line.

How long do water shut-off valves last?

Ideally, water shut-off valves have to last forever. The life of a valve depends on the frequency of usage as well as the valve environment. High spikes in water pressure at certain points at a frequent pace decrease the valve quality. Thus it all depends on your usage and cannot be generalized. But most companies provide fixed and extended warranties that can cover major shortcomings.