YoLink Water Leak Starter Kit: Hub + 4 Leak Sensor 1 (Silent), LoRa Long-Range, App/SMS/Email Alerts, D2D Offline Triggers, 2 AAA Up to 5-Year Battery, Compatible with Alexa/IFTTT/Home Assistant
Condition: New
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Extended holiday returns
Returnable until Jan 31, 2026 Learn more
Returnable until Jan 31, 2026 Learn more
This item's return window has been extended for the holiday season: Returnable until Jan 31, 2026
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
Availability:
Only 1 left in stock, order soon!
Arrives
Saturday, Dec 20
Style: 0 dB 4 Sensors
Features
- Complete plug-and-play kit: hub plus Leak Sensor 1 units for whole-home coverage at toilets, sinks, water heaters, laundry, dishwashers, and sump areas.
- Long-range LoRa: reliable coverage where Wi-Fi struggles (up to 1/4-mile open air); get app, email, and SMS/text alerts and name sensors by location.
- Works even without internet: with YoLink Control-D2D, sensors can directly trigger YoLink sirens or shutoff valves for local protection during outages.
- Silent design: Leak Sensor 1 has no built-in siren; add SpeakerHub or a YoLink siren for audible or spoken alerts if desired.
- Scalable IoT platform: one hub supports 300+ YoLink devices; part of a whole smart home/building ecosystem; hub options include standard Hub, SpeakerHub, and Cellular Hub.
Color: White
Brand: YoLink
Power Source: Battery Powered
Compatible Devices: Smartphone
Product Dimensions: 4.33"L x 4.33"W x 1.06"H
Battery Description: AAA
Number of Batteries: 8 AAA batteries required. (included)
Voltage: 3 Volts
Control Method: App
Mounting Type: Wall Mount,Floor Mount
Maximum Range: 1320 Feet
Sensor Technology: Contact Sensor
UPC: 850024791565
Manufacturer: YoSmart
Part Number: YS1603+4YS7903
Item Weight: 1.34 pounds
Product Dimensions: 8 x 2 x 4 inches
Item model number: YS1603+4YS7903
Batteries: 8 AAA batteries required. (included)
Included Components: Batteries
Batteries Included?: Yes
Batteries Required?: Yes
Battery Cell Type: Alkaline
Description Pile: AAA
Date First Available: February 29, 2020
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Saturday, Dec 20
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Learn more about financing & leasing here.
Similar Products
Top Amazon Reviews
Style: 0 dB 4 Sensors
I bought this leak starter kit after dealing with a small leak under the sink that turned into a big cleanup job with a new cabinet...lol. I wanted something simple and reliable this time, and so far this system has been exactly that. Setup was super easy. I plugged the hub into my router, opened the app, and it basically did the rest. Each sensor paired with one button press. I had everything installed in maybe 10–15 minutes for entire house. What I like most is that these don’t depend on Wi-Fi. I’ve got one sensor tucked behind a toilet, another under the kitchen sink, and even one in a spot where my Wi-Fi normally dies... and every sensor still connects with no issues. I tested all four sensors with a damp paper towel, and they alerted instantly. I get notifications on my phone and email, which is great for when I’m not home. A big plus for me is the battery life. These use simple AAA batteries, but they’re supposed to last years, not months. And the app actually shows the battery level for each sensor, so you’re not guessing. It’s nice to know you won’t get blindsided by a dead sensor right when you need it. The sensors feel solid and the app is straightforward. Honestly, this setup has already given me more peace of mind than anything else I’ve tried.
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Reviewed in the United States on November 19, 2025 by TK
Style: 105 dB 4 Sensors
This leak detection kit has saved me thousands of dollars in additional damage. Already catching a laundry room leak and a kitchen leak. I purchased this after a bathroom leak caused major damage and I had to have a way to monitor while away. Great product. Easy setup and very reliable.
Reviewed in the United States on December 1, 2025 by Aaron P.
Style: 0 dB 4 Sensors
I bought these sensors, for some peace of mind. I wanted to buy ones that had long range, and as I have heard from other reviews and articles, this LoRa technology promises, exactly that. The hub was easy to add to the app, and then leak sensors themselves were even easier to add; all I had to do was push a button at the bottom, and they were immediately discovered by the hub. From there, it was relatively simple to add them into Home Assistant. Although this took a couple of tries. So far, in a couple of weeks that I have owned them, connectivity has remained rock solid. If this continues to be the case, I think I am going to splurge and buy their local hub. Although it costs $200, it allows for 100% local control and management of the sensors, without the need for the cloud, which I really appreciate, as I try to make sure that all my smart devices are locally controlled. All in all, I find this sensors to be a good purchase, and their reliability so far gives me peace of mind that they will work if and when I ever need them to.
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Reviewed in the United States on November 26, 2025 by Javier Ruiz
Style: 0 dB 4 Sensors
So far so good. I've sprayed a bit of water on the sensors and received an instant notice about water detection on my phone. So, hopefully I'll never have an emergency, but the system is easy to set up and seems to work very well.
Reviewed in the United States on November 14, 2025 by Greg
Style: 0 dB 4 Sensors
This hub and its devices were very easy to setup (even with a 3 band router). The connections have been solid and constant since the setup over the last year. The original batteries are still going strong. The application is easy to use, shows both the Wi-Fi signal strength & battery levels and has good alerts. There are several other devices that can be linked to the hub.
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Reviewed in the United States on November 19, 2025 by Dave
Style: 0 dB 4 Sensors
Great product. Simple to setup, the prongs are sensitive enough even for damp water. And they don’t stand out at all when you place them. We go on extended camping trips and these give us peace of mind our house is in good hands. I’ve recommended to many others already.
Reviewed in the United States on November 22, 2025 by Matthew P Mehus
Style: 0 dB 4 Sensors
I have been using the YoLink Smart Leak Sensor for over six months now, and I can confidently say this product is absolutely amazing. It’s an essential device for any homeowner looking for real peace of mind. The setup process was incredibly easy and straightforward—it took just minutes to get the sensor placed and connected to the hub. The feature that truly sets this sensor apart is the notification system. The alerts are not just fast, they are truly instant and timely. Knowing that I will be alerted the second a leak occurs is invaluable. Furthermore, the sensitivity is very accurate; it detects even the smallest amount of water without giving false alarms. And the alarm is loud and clear.
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Reviewed in the United States on November 29, 2025 by H K
Style: 105 dB 4 Sensors
Quality product. One of those things that you don't really notice until you need it, which we did once and it helped immensely to get an immediate alert. There isn't a whole lot to say - the app is simple and pretty intuitive. Devices are compact and seem to have good battery life (had mine for about 7 months and it's still at 90% or so), they stay connected and online and require zero maintenance. Will consider other products from YoLink.
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Reviewed in the United States on November 11, 2025 by V. Paramygin