Model # 16ZULW-B

Internet #206681009

Store SKU #1001642871

Rachio 16 Zone Smart Sprinkler Controller, 2nd Generation


16 Zone Smart Sprinkler Controller, 2nd Generation

  • Easy to control anywhere anytime from your phone tablet or laptop
  • Automatically adapts for weather, optimizing watering schedules.
  • Save water and money. Save up to 50% of your outdoor water use.
$24839 /each
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Frequently Bought Together

Product Overview

Take control of your watering with a Rachio Smart Sprinkler Controller. With the modern irrigation technology of Rachio, you can water with precision using customized, automated schedules that adapt to weather. Manage on mobile, and access more control options with top-tier integrations. Inspire yard envy while saving water and money.

  • Highest-rated, best-selling, the smart watering category leader, overwhelmingly recommended by users
  • Easy to control anywhere, anytime, get complete access to monitor and adjust your sprinkler system from your phone, tablet or laptop
  • Automatically adapts for weather, Rachio continuously adapts to local weather forecasts and changing seasons, automatically optimizing watering schedules
  • Save water and money, save up to 50% of your outdoor water use while keeping your plants healthy, EPA WaterSense certified, eligible for rebate options up to 100% of retail value
  • Water with precision, Rachio uses specific yard details, advanced watering algorithms and proven irrigation science to create accurate schedules customized to the particular needs of your yard
  • Connect with top smart home platforms. Extend your smart home out into the yard. Rachio directly integrates with the best-connected home platforms (Amazon Alexa, Google Assistant, IFTTT, Nest, and more), so you have more options and more control.

  • Click here for more information on Electronic Recycling Programs

Info & Guides

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Product Depth (in.)
Product Height (in.)
Product Width (in.)


Electronic,Irrigated,Odd/Even Day Program,Programmable,Smart Timer,Wi-Fi
Hub Required
No hub connection available
Irrigation System Component
Mount Location
Number of Programs
Number of Zones
Power Options
Remote Access
Remote Access
Requires Hub?
No Hub Required
Smart Home
Smart Home Enabled
Smart Home Protocol
Voice Control Hub Required
No Hub Required for Voice Control
Works With
Alexa, Control4, Google, Nest, Nexia, Samsung SmartThings, Samsung SmartThings

Warranty / Certifications

Manufacturer Warranty
2 Year Limited

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Customer Questions & Answers

Will this controller allow me to run half of the zones one day and the other half of the zones on another day?

Asked by: sparky
Sure Will
Answered by: Sundeep
Date published: 2017-08-11

Can the device be controlled with an iPhone and/or an apple computer

Asked by: Taxman
Yes, and it works well with iPhone 6 or 7.
Answered by: Waterman
Date published: 2016-11-11

Is this a z wave device or just wifi? Z wave would be better for me since the wifi router is far away.

Asked by: Del
There's a lot of wrong/bad information here and I think people should not answer questions unless they KNOW the answer. It's misleading, at best, and may propagate far and wide. The Rachio panel does NOT support Z-wave. The Nexia compatibility is due to the fact that Nexia REQUIRES a WiFi bridge. It's the first thing that must be purchased and installed to use Nexia. So, you can use Nexia to control WiFi devices. It's not even accurate to claim that "Nexia is Z-wave only." Also, it is true the Rachio does not support 5GHz WiFi, but it is NOT true that it will not work with a dual-band router. This is absurdity. You don't even had to turn off the 5GHz radio... just ensure your SSID is same on your app and the Rachio. If your router is not properly bridging the 2.4 and 5GHz then that is the problem and it's not uncommon with older or buggy firmware. The AC68U is a perfect example of this and enabling "legacy mode" is a work-around until the firmware is updated. Please stop "helping" by providing information you "think" is correct.
Answered by: Engineer
Date published: 2017-06-23

What is the minimum time you can turn a zone on for?

What is the minimum time you can turn a zone on for?
Asked by: Gardener
One Minute.
Answered by: Persistant
Date published: 2017-07-23
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Customer Reviews

16 Zone Smart Sprinkler Controller, 2nd Generation is rated 4.8 out of 5 by 245.
Rated 5 out of 5 by from I'm really impressed with this as compared to my old Rainbird. Setting it up was easy. You take a... I'm really impressed with this as compared to my old Rainbird. Setting it up was easy. You take a picture of the wires on the rainbird so you can refer later to see which wire is going to which number/label. Undo those wires on the old unit and then put them in the same named slot on the Rachio. It was a little hard to poke the wires into the Rachio but not too big of a deal. You then use your phone to log into the Rachio's wifi to go through the set up (which is self explanatory along the way). I set it up in less than 10 minutes. Once the controller is set up on the wall, you can walk around with your phone to test the zones - no need to be near the controller at all since it does everything through wifi (only downside is you could get your phone take care with that). That is convenient when you think you have a sprinkler head that is misaligned or if you are out of town and you want to turn on your sprinklers via computer/phone for whatever reason. You DO have to have a wifi signal for this device to make any sense. It gets the weather from a local weather station and can adjust the watering based on what is forecasted for the next few days. It also works with IFTTT so you can download that app and have it do all sorts of fun stuff like have it work with Amazon Alexa or Google Home or just track usage in a spreadsheet automatically. You can take a picture of your lawn and label all the zones with real names so they make sense to you while you are using the app. You can let it schedule everything for you by telling the app what kind of plants/soil/sprinkler heads you have or you can do it on a timed schedule you set or you can run it manually. Mostly though, I just really like it that it incorporates not just a rain sensor (like my old system) but also the forecast. Even if my yard is slightly dry, it makes no sense to run a full schedule if the forecast is for rain tomorrow - better to just delay and see how the weather plays out. It does that automatically. The other thing I like a lot is that it adjusts for poor quality soil. I've got nearly all clay so if I run my sprinklers for 30 minutes straight, my plants only get 10 minutes of water and the other 20 minutes mostly goes down the storm drain. In the old system, I could set that up manually but it took forever to get the system set up and frankly, I was completely guessing how long to run and how long to wait before starting the zone again (I'm a mom, not a soil/irrigation expert!) This does that on its own after you tell it what type of plants/soil/slope you have in each zone. Very nice.
Date published: 2017-02-28
Rated 5 out of 5 by from I've had the 8-Zone Rachio unit for about 5 weeks now and love it. I found it to be easy to setup... I've had the 8-Zone Rachio unit for about 5 weeks now and love it. I found it to be easy to setup and operate. The customer support and online knowledge info is excellent. For those who want total control over every aspect of your irrigation system, this unit is for you. I love how I can stand in my yard and control my irrigation timer remotely with the app on my phone or from 400 miles away while sitting in a coffee shop. From the moment you register this product the company's support team reaches out to you, not just once but multiple times to ensure your satisfaction with their product. I highly recommend this product.
Date published: 2017-05-08
Rated 2 out of 5 by from Indoor rated This unit is rated for indoor installation only. I think they will sell you an outdoor rated housing, but at 250 dollars, it should be outdoor rated to begin with. The power supply is huge and takes up two plugs. Now I don't have a socket to plug in my landscaping lighting. There are a lot of bugs when setting up the app, but at least it seems to be working fine for now. I'm not sure if I'm going to keep it. I don't want to pay extra for an outdoor housing. The water savings are ok, but I rather have my landscape lighting and a different sprinkler controller.
Date published: 2017-04-18
Rated 5 out of 5 by from I’m a 61 year old guy and I replaced and installed the unit myself. It was so incredibly easy to ... I’m a 61 year old guy and I replaced and installed the unit myself. It was so incredibly easy to do! I also do my own maintenance on our 9 station system and it’s been a HUGE time saver when adjusting or replacing heads and nozzles. Amazing overall control. To get in touch with my nerdy side, I’ve also linked it to my Amazon Dot. Again, really easy to do. Straight up, I haven’t found a truly practical use for the link, but my friends are amazed when they come over and I make the “DOT, start station 3” do what it does. LOL...Their reaction is somewhat similar to when National Geographic shows a remote native tribe a Polaroid photo of themselves. That alone wi worth the price of admission. Bottom line... I love the product!
Date published: 2017-06-26
Rated 4 out of 5 by from The best--but still not always easy to optimize I've had the opportunity to use several smart sprinkler controllers, and I can confidently say the Rachio controllers have the best software I've used. (I've had no hardware issues with any of them.) Still, there are a lot of technical details that go into setting these systems up correctly, and it's taken me a long time to make good progress on getting it to behave correctly for my landscaping. If you simply want a smartphone or web interface to control your watering system the way you do with you existing non-smart controller, you should find this easy to use. But if your goal is truly to optimize your watering so you don't use excess water or money, be prepared for a bit of a learning curve. Let me talk a little more about why I think Rachio is the best out there: 1) They have extensive online help and FAQs to help guide you through many issues (competitors I have used have much more limited help resources); 2) I have been able to call and talk to a human (in America) when I have needed more extensive help; 3) Rachio gives you access to a lot of "knobs" to help you tweak your watering settings (while competitors I have tried have a 'black box" design that gives you no insight or control into adjusting things beyond the main settings). Now for more details: I changed from a 1st-generation Rachio controller to this one because I outgrew the 8 zones of my first controller, and thus upgraded to this 2nd generation 16-zone controller. Everything was smooth with the initial installation and setup. They've made a few improvements since their 1st generation controller, but the software is basically the same between both, so I see no compelling reason to upgrade if you have enough zones. Two important things worth mentioning about the setup: 1) You need a 2.4 GHz wireless network (most modern Wi-Fi supports both 2.4 GHz and 5 GHz); 2) The Rachio controllers are NOT weatherproof, so if you are going to install this outside, you need a weatherproof box to put it in (which Rachio makes and is available on the website). When I got my first smart controller, I had visions that they would automatically do what I did manually: delay the sprinklers for a while when it rains, and adjust the amount of watering using a percentage "Season Adjust" as the weather changes. While the smart controllers have the rain part down pretty well, they don't just vary a percentage they way I was expecting for season adjust. Now let me get into some programming details. Note that Rachio is continually updating their software, so what I am describing now may change in the future. (It's certainly changed since I reviewed their 1st-generation controller.) When you set up each zone, you have to tell the controller about what you are watering in that zone, and this is where things can get challenging: What type of vegetation (shrubs, annuals, cool season grass, warm season grass, etc.), what type of soil, how much exposure (how much sun vs. shade), what type of nozzle waters this area, and what the slope is. There are also some advanced settings (like root depth). All of this controls how each zone will be watered. From what I can tell, this works very well IF you get all of this right, but getting it right can be a challenge. Do you know if your lawn is cool season grass or warm season grass? Do you know if your soil is Clay Loam, Sandy Loam, or just plain Loam (or yet some other type)? Do you know how many inches per hour your watering nozzles put down? If you don't get these right, very likely your watering won't be right, so you'll either have to do some research or some trial-and-error over time to get things right. In terms of "smart" watering schedules, Rachio currently has two many categories. The first is "Flexible Monthly." I find this the easiest to set up and work with because it is the closest to how a non-smart system works: You still program run times for each zone, and then Rachio alters the schedule every month based on historical weather for your area (how often it waters along with how long it waters). This is easy and it changes with the seasons (and it can skip for rain), but it works on historical weather averages rather than current weather. The problem I have is that often my weather isn't "average." It's not uncommon for weather here to be 10 degrees above average for one week, and then drop to 10 degrees below average the next. So if I set watering times for 10 degrees above average, I'll overwater a lot. But if I set it for "average", then I'll underwater during hot weather. The other "smart" setting is "Flexible Daily," and this works closer to what I want. It monitors current weather on a daily basis to figure out how much water my soil and plants loose every day ("evapotranspiration" is the technical term if you want to research it), and then it waters to replace that. This does a very good job of adjusting for above vs. below average temperatures. The challenge here, however, is this is very dependent on all those settings you input about your plants, soil, and watering system. Something that wasn't intuitive to me about this (although it does have science to back it up) is that this doesn't very run times on a daily basis, but instead varies how often it waters. Initially I had my soil type set to Clay Loam (apparently incorrectly), and as a result it put down a ton of water on my lawn, but only every 5 days in the peak of summer. The result was that my lawn was pretty brown in a few weeks. When I changed this to Loam, it watered less every 3 days, and when I changed it to Sandy Loam, it watered for still less every 2 days. In all of these cases the total water being applied was about the same, it just varied how it distributed it among days. Apparently my soil is actually more like Sandy Loam, as my lawn is looking much healthier now that it is getting watered more often. I've also been tweaking the flow rates on my nozzles and other items. But I haven't yet reached a point where my water bill shows I'm actually using less water than I was when I manually adjusted my controller. So the bottom line is be prepared to spend a lot of time tweaking your landscaping settings to get things optimized to match you actual conditions. One final note about smart devices in general: Most of these devices are totally dependent on the "smart" of the computing power of the company behind it, and are just paper weights if that company ceases to support your product. (I have some "smart" light bulbs that can no longer be controlled because the company who sold them got out of the "smart" business and turned off their controlling software.) So if you want to use your smart devices for years to come, choose a company that you think will still support their product years from now. Rachio is one of the first companies I know of in the smart sprinkler controller business, so I'm personally betting they will be around for a while. But do your own research.
Date published: 2016-10-10
Rated 5 out of 5 by from Recently had the Rachio system installed. I ran into some roadblocks in trying to make some chan... Recently had the Rachio system installed. I ran into some roadblocks in trying to make some changes to the watering schedule. I sent an email to Rachio support and asked some questions. Within a couple of hours I received an email reply (and that was on a Sunday!). Great customer support. this is so much better than what I had!
Date published: 2017-04-29
Rated 5 out of 5 by from I installed three controllers on my property. One was installed in the garage; the other two wer... I installed three controllers on my property. One was installed in the garage; the other two were installed in the Rachio waterproof box, in the yard. Hardware setup couldn't be easier. Simple instructions; all the hardware needed was included in the box. Software setup was also super easy, including connecting to my WiFi network. I was a bit concerned whether the two in the yard would reach the WiFi router in the house. No problem, and one of them is a few hundred feet from the house. The scheduling app was super easy and intuitive. I was able to take a picture of, and label, each station location. So, it's really easy to go back and change something. And, now I can stand in the yard and turn on any station I want, with my iPhone, which really helps when I'm trying to fix broken sprinklers. I also get messages on my phone when a watering series starts and stops. And, I get notified if watering was skipped because of weather (e.g., rain in the area). Overall experience was better than expected.
Date published: 2017-04-26
Rated 4 out of 5 by from Great product Installation and set up were a breeze. This is probably a 5-star product but I am still figuring out the settings and advanced features. It met my immediate desire which was to automate sprinkler control and be able to share control with my service provider.
Date published: 2017-05-30
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