Before the Drip Becomes a Disaster: Shelly Flood Gen4 Delivers Smart Water Leak Detection and Protection for All Properties
Built for proactive protection, this new sensor features an extendable cable design for expanded coverage, multi-protocol connectivity, and advanced automation options.
Boca Raton, FL — November 17, 2025 — Shelly Group, a global leader in home automation and smart building solutions, today announced the availability of the Shelly Flood Gen4, the most versatile smart water leak detector on the market designed to detect water leaks and floods before they turn into costly disasters. Engineered for unmatched reliability, the new sensor features an extendable sensor cable for monitoring hard-to-reach or expansive areas and supports Matter, Wi-Fi, Zigbee, and local control connectivity for seamless integration into all major smart home ecosystems including Google Home, Amazon Alexa, Apple Home, Samsung SmartThings, Home Assistant, and other popular platforms.
Compact yet powerful, the Shelly Flood Gen4 features a 2-meter (~6.5 feet) extendable sensor cable that offers unparalleled placement flexibility and broad detection coverage, making it easy to monitor hard-to-reach or high-risk areas. Users can link additional cables to extend coverage up to 150 meters (~500 feet), ideal for monitoring large rooms, perimeters, and multiple leak-prone zones with a single device.
Designed for use across all property types, the Shelly Flood Gen4 alerts users the moment water is detected, sending critical notifications directly to their mobile device via the Shelly app, or by sounding an audible alarm. Ideal for any space with plumbing or potential water intrusion, the Shelly Flood Gen4 provides essential protection for kitchens, bathrooms, laundry rooms, basements, garages, utility closets, secondary/vacation homes, or anywhere water could cause major damage.
Beyond detection and notification, the Shelly Flood Gen4 can be paired with other Shelly devices or seamlessly integrated into expansive connected systems to unlock powerful, cost saving, automations. When paired with compatible Shelly relays or other connected solutions, this sensor can trigger automations to cut power to appliances such as dishwashers or washing machines the moment a leak is detected, preventing further damage. For even greater protection, the Shelly Flood Gen4 can be connected to smart water shut-off valves through supported platforms, automatically stopping water flow at the source the moment a leak is detected.
Equipped with industry leading multi-protocol connectivity, the Shelly Flood Gen4 is Matter-certified and supports Wi-Fi and Zigbee connectivity, in addition to full local control, ensuring easy integration with any connected ecosystem. This flexibility allows homeowners, property managers, and professionals to select the connectivity standard that best pairs with the installation environment, without any compromise to responsiveness or reliability.
Powered by four replaceable AA batteries (included), the Shelly Flood Gen4 ensures uninterrupted operation and effortless installation – no wiring required – making it ideal for any location where leaks could occur unexpectedly. This detector features an estimated battery life of up to two years, depending on battery quality, device usage, and network connectivity.
For added customization, the device supports two distinct detection modes – flood and rain – giving users the versatility to monitor indoors for leaks or outdoor conditions to trigger other relevant automations.
“Shelly Flood Gen4 isn’t just a sensor, it’s a safeguard against unexpected water disasters that are all too common,” said Svetlin Todorov, CEO of Shelly USA and co-founder of Shelly Group. “From a slow leak beneath the sink to flooding due to a burst pipe or heavy rain, this device provides users with real-time alerts and peace of mind in knowing that their home or business is protected around the clock.”
As a Gen4 device, the Shelly Flood Gen4 shares the same robust features and expanded connectivity as the rest of the portfolio, ensuring consistency, scalability, and cross-device compatibility. Additional Shelly Gen4 devices are slated to become available in the coming months.
The Shelly Flood Gen4 is available now for purchase directly from us.shelly.com and through authorized distribution partners worldwide. MSRP for the Shelly Flood Gen4 is $32.99. Add-on accessory sensor cables (2 meters / 6.5 feet) are also available for $7.49.
For more information about Shelly, please visit us.shelly.com.
About Shelly Group
Shelly USA, a subsidiary of Shelly Group SE, delivers innovative, affordable smart home solutions tailored to the U.S. market. With a diverse portfolio of smart relays, energy meters, lighting controls, and sensors, Shelly empowers users to create intelligent, energy-efficient smart homes with ease. Designed for flexibility, Shelly devices integrate seamlessly with major platforms like Google Home, Amazon Alexa, Apple HomeKit, Samsung SmartThings and Home Assistant—no hubs required—and enable users to control, automate, and monitor just about anything. Committed to privacy and security, Shelly offers GDPR-compliant devices with local control options, ensuring data remains secure. By blending affordability, reliability, and advanced functionality, Shelly makes smart home technology accessible and customizable for both first-time users and tech enthusiasts. Shelly USA proudly contributes to Shelly Group’s global mission to bring high-quality IoT products to over 100 markets.