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  • YoLink Water Leak Sensor 4
  • Water Leak Sensor 4
  • Water Leak Sensor 4
  • Water Leak Sensor 4
  • Water Leak Sensor 4
  • Water Leak Sensor 4
  • Water Leak Sensor 4
  • Water Leak Sensor 4
  • Water Leak Sensor 4
Last updated July 2026

YoLink Water Leak Sensor 4

4.8
1,520 ratings
Launch Year: 2023

Model: YS7906

29% OFF
$23.99
$17.09
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Our review

YoLink Water Leak Sensor 4 Review: Long-Range LoRa Detection That Owners Trust for Whole-Property Coverage

A hub-based leak sensor with a loud independent siren and multi-mile LoRa range, at the cost of needing a dedicated hub instead of plain Wi-Fi.

The verdict

The YoLink Water Leak Sensor 4 pairs a LoRa radio with a YoLink hub to deliver leak detection across large homes, garages, and outbuildings where Wi-Fi and Zigbee sensors struggle to reach. Owners consistently praise its long range, on-device siren that works even if the hub is offline, and multi-year battery life, with several reporting it caught a burst water heater or washing machine hose before serious damage occurred. The trade-off is that it needs the separate YoLink hub rather than connecting straight to home Wi-Fi, and a few buyers find the companion app's options confusing at first.

Best for
  • Large properties needing long-range leak coverage
  • Homeowners protecting water heaters, sump pumps, and washing machines
  • Buyers who want Alexa or IFTTT-triggered leak alerts
  • Multi-sensor households scaling up to a dozen or more units

Pros

  • Long-range LoRa connection reaches far corners of large properties
  • Loud 105dB on-device siren fires even if the hub loses connection
  • Around 5 years of battery life on 2x AAA batteries
  • Alexa voice alerts and IFTTT automation support
  • Also reports low-temperature and freeze-risk conditions

Cons

  • Requires a separate YoLink hub; no direct Wi-Fi, Zigbee, Z-Wave, Thread, or Matter
  • No Apple HomeKit, Google Home, or Samsung SmartThings integration
  • Some buyers find the companion app confusing to configure
  • No tamper alert
  • No included sensor cable for remote-point detection

Who is the YoLink Water Leak Sensor 4 for?

This sensor is built for homeowners who want to blanket a property, not just a single room, with leak detection. Because it uses YoLink's proprietary LoRa radio rather than Wi-Fi, Zigbee, or Bluetooth, it can reach sensors placed far from the router, such as in a detached garage, basement corner, or outbuilding, provided a YoLink hub is present to relay the signal. Reviewers commonly deploy several units at once, with some owners reporting 8, 20, or more sensors spread across water heaters, sump pumps, washing machine pans, and bathrooms in a single property.

What buyers love

The most repeated praise is peace of mind backed by real saves: multiple reviewers describe the sensor catching a failing water heater or a washing machine hose burst before it turned into major damage, with some crediting it for preventing thousands of dollars in repairs. The on-device 105dB alarm is a standout feature because it fires locally even if the hub or Wi-Fi is down, which owners specifically call out as reassuring. Long wireless range, easy initial setup, and the roughly 5-year battery life on 2x AAA batteries also come up repeatedly, along with support for Alexa voice alerts and IFTTT automations for owners who want leak events to trigger other smart home actions. The sensor also reports low temperatures, letting the same device flag pipe-freeze risk alongside water leaks.

What to know before you buy

The sensor requires a separate YoLink hub since it has no 2.4GHz Wi-Fi, 5GHz Wi-Fi, Bluetooth, Zigbee, Z-Wave, Thread, or Matter radio of its own, so factor in the hub as part of the real setup if you do not already own one. It also has no Apple HomeKit, Google Home, or Samsung SmartThings integration, so it fits an Alexa or Home Assistant setup better than an Apple-centric one. A handful of reviewers found the companion app confusing to configure at first, even though most describe the physical installation itself as quick. There is no tamper alert and no included sensor cable, so it detects moisture only at its own physical location rather than via a remote probe.

Is the YoLink Water Leak Sensor 4 worth it?

For the price, this is one of the most trusted leak sensors among buyers who have actually experienced a save, and the consistently high praise across many independently purchased units suggests strong real-world reliability rather than a fluke. The long LoRa range and independent on-device siren set it apart from plain Wi-Fi sensors that go silent when the network drops. Anyone building out whole-property leak coverage, especially across multiple rooms or an outbuilding, gets clear value here; buyers who specifically need Apple HomeKit or Matter support should look at a different sensor instead.

Frequently asked questions

Does the YoLink Water Leak Sensor 4 need a hub?

Yes. It connects over YoLink's proprietary LoRa radio rather than Wi-Fi, so it requires a YoLink hub to relay alerts to the app and to other integrations.

Does it work with Alexa or Apple HomeKit?

It supports Alexa and IFTTT, plus Home Assistant, but it does not integrate with Apple HomeKit, Google Home, Samsung SmartThings, or Matter.

Will it still alert me if the Wi-Fi or hub goes down?

Yes. It has an on-device 105dB alarm and alert light that trigger locally at the sensor itself, independent of hub or internet connectivity.

How long does the battery last?

It runs on 2x AAA batteries rated for about 5 years, backed by a 2 year manufacturer warranty.

Can it detect freezing pipes as well as leaks?

Yes. Alongside water leak detection, it reports low temperatures and can send freeze-temperature alerts to warn of pipe-freeze risk.

At a glance

Summary

Everything this water leak sensor supports, grouped by category.

Size & Materials
Weather Resistance (IP66)2.4 × 2.4 × 1 in (62 × 62 × 24.5 mm)2.9 oz (81 g)
Integrations
AlexaHome AssistantIFTTT
Sensors
Water LeakTemperature (Low Temperatures)
Alerts
Water Leak AlertsTemperature Alerts (Low Temperatures)Freeze Temperature AlertsLow Battery Alerts
Features
On Device Alert SoundOn Device Alert Light

Price History

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Company
YoLink logo

YoLink

4.6/ 5 avg ratingUSA flagHeadquartered in USA

YoLink uses its own long-range LoRa wireless technology to connect smart home sensors and devices across large properties where Wi-Fi and Zigbee struggle. Its catalog includes leak sensors, door sensors, sirens, valve controllers and smart plugs, managed through the YoLink app and hub. YoLink is popular for whole-property monitoring thanks to its long wireless range.

Full specifications

Every spec, organized

Browse the full breakdown by category. Tap the on any row for what it means, or the for sources and documentation.

Size & Materials

Weather Resistance

IP66

Dimensions

2.4 × 2.4 × 1 in (62 × 62 × 24.5 mm)

Weight

2.9 oz (81 g)

Included accessories

Sensor Cable

NO

Power

Wired

NO

Battery Type

2x AAA

Battery Life

5 years

Connectivity

2.4 GHz WiFi

NO

5 GHz WiFi

NO

Bluetooth

NO

Z-Wave

NO

Zigbee

NO

Thread Protocol

NO

Other

LoRa (YoLink hub required)

Integrations

Google Home

NO

Alexa

YES

Apple HomeKit

NO

Samsung SmartThings

NO

Home Assistant

YES

IFTTT

YES

Matter

NO

Sensors

Water Leak

YES

Temperature

Low Temperatures

Tilt

NO

Alerts

Water Leak Alerts

YES

Temperature Alerts

Low Temperatures

Freeze Temperature Alerts

YES

Low Battery Alerts

YES

Tamper Alerts

NO

Features

On Device Alert Sound

YES

105dB

On Device Alert Light

YES

Automations

YES

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