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
Tuesday, Dec 16
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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:
Tuesday, Dec 16
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.
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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
This YoLink system really is impressive. I already had the freezer thermometer system and added these leak detectors to my current hub. So easy to setup and they work great. Surprised how good the connection to the hub no matter how far away it is.
Reviewed in the United States on December 10, 2025 by R. Mackey
Style: 0 dB 4 Sensors
Only had it for a few days but so far it seems excellent. Onboarding the Hub and Sensors was very easy. I was very pleased with the fact that it integrated with Alexa without much trouble. I have tested each of the sensors and they work perfectly.
Reviewed in the United States on November 5, 2025 by Laird
Style: 0 dB 4 Sensors
I installed the YoLink Hub and Water Leak Sensors throughout my home, and the setup was impressively straightforward. The instructions were clear, pairing the sensors with the hub took just minutes, and everything worked right out of the box. The long-range LoRa technology is a game-changer — I placed sensors in my basement and garage with no connectivity issues. I also linked the system to Amazon Alexa, so I now get voice alerts if a leak is detected, which adds an extra layer of protection. The sensors are compact, battery-powered, and easy to tuck behind toilets, under sinks, or near the water heater. I appreciate the app notifications and the ability to name each sensor by location. It’s a smart, reliable system that gives me peace of mind. Highly recommended for anyone serious about water damage prevention — especially in larger homes or areas with weak Wi-Fi.
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Reviewed in the United States on November 11, 2025 by Chzhd325
Style: 105 dB 4 Sensors
I purchased multiple components for this YoLink system for my new-to-me home. I have the base unit (actually a couple because I bought so many sets) and temperature sensors for my fridge & both freezers, and seven water leak sensors. (Two bathroom sinks, kitchen sink, under both toilets, under my washer hook ups, and in the drip pan for my water heater.) Well, since I installed them in December 2024, the sensors have alerted me to multiple leaks (multiple kitchen sink leaks for different reasons, master bath toilet supply line, master bath sink). I’ve been alerted several times to different fridge and freezer alerts (door left ajar and freezer was defrosting so I could’ve lost all my meat, fridge temp went too high and food was at risk). More than once I got these alerts. I get alerts sent to my phone as a text, an email, and the base unit has an audible alarm and the text is read out to tell me what the alarm is for. I cannot recommend these systems and components more highly!!! I’ve saved so much money, hassle and time by having these installed. Installation is SIMPLE and the directions are well written. I had all the sensors up and running in literally under an hour, from unboxing to all ten sensors connected and alerts configured. This app is well laid out and easy to manage. I have not yet run into where I would need to pay for the service. I’m using just the “free” allotment of alerts. If need be, I wouldn’t hesitate to pay for the service because this has PAID FOR ITSELF many times over. Please save yourself money, headaches, and give yourself peace of mind. If you have a property where you leave it vacant for periods of time (vacation rental or seasonal property) YOU NEED THESE!! Heck, I live here and it’s saved my bacon time and again (pardon the pun).
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Reviewed in the United States on August 20, 2025 by betzjo
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
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