Shelly Flood Gen4 — Smart Leak & Rain Detector

Shelly Flood Gen4: battery-powered water leak & rain sensor with extendable cable (up to 150 m), Wi-Fi / Zigbee / Bluetooth / Matter support, real-time alerts & local automations.

Shelly Flood Gen4 – Smart Water Leak & Flood Sensor (Wi-Fi, Matter, Zigbee, Bluetooth)

Shelly Flood Gen4 is an advanced smart water leak detector designed to protect your home from costly water damage. With multi-protocol connectivity including Wi-Fi, Zigbee, Bluetooth, and Matter, this next-generation flood sensor integrates seamlessly with Apple Home, Google Home, Amazon Alexa, SmartThings, and Home Assistant.

Whether installed under sinks, behind appliances, in basements, laundry rooms, or near water heaters, Shelly Flood Gen4 provides real-time leak detection and instant mobile alerts — helping you stop small leaks before they turn into expensive repairs.

Why Choose Shelly Flood Gen4?

Instant Water Leak Detection: Detects the presence of water the moment it appears.
Extendable Sensor Cable: Covers larger areas than traditional point sensors. Expandable for extended perimeter monitoring.
Multi-Protocol Connectivity: Works over Wi-Fi, Zigbee, Bluetooth, and Matter for maximum flexibility.
No Hub Required (Wi-Fi Mode): Connects directly to your network.
Smart Home Automation Ready: Trigger shut-off valves, alerts, sirens, or automations instantly.
Battery Powered: Flexible placement without wiring.
Compact & Discreet Design: Fits easily in tight spaces.

Designed for Smart Home Automation

Shelly Flood Gen4 is built for modern smart homes. Using Matter or native integrations, you can:

Automatically shut off a smart water valve when a leak is detected
Turn on lights or trigger alarms
Receive push notifications, email alerts, or voice assistant announcements
Monitor remotely through the Shelly Smart Control app

It works independently or as part of a larger home automation system, making it ideal for homeowners, property managers, rental property owners, and smart home enthusiasts.

Ideal Installation Locations

Under kitchen and bathroom sinks
Behind refrigerators and dishwashers
Near washing machines
Next to water heaters
Basements and crawl spaces
HVAC drain pans
Vacation homes and rental properties

Technical Highlights

Connectivity: Wi-Fi, Zigbee, Bluetooth, Matter
Power: Battery operated
Detection Type: Water presence via contact sensor cable
Smart App Control: Shelly Smart Control
Voice Assistant Support: Alexa, Google Assistant, Apple Home
Automation Support: Webhooks, local scripts, cloud automations

Frequently Asked Questions

What is Shelly Flood Gen4?

Shelly Flood Gen4 is a smart water leak sensor that detects water presence and immediately sends alerts to your smartphone or smart home system to help prevent water damage.

Does Shelly Flood Gen4 require a hub?

No hub is required when using Wi-Fi. It can connect directly to your home network. Zigbee and Matter can also be used within compatible ecosystems.

How is this different from standard water leak sensors?

Unlike basic puck-style leak detectors, Shelly Flood Gen4 supports multi-protocol connectivity, advanced automation, extended cable detection coverage, and full smart home integration.

Can I automate a water shut-off valve?

Yes. You can configure automations to close a compatible smart valve immediately after leak detection, minimizing potential water damage.

Where should I install the sensor?

Install it in areas most prone to leaks, such as under sinks, near appliances, next to water heaters, or in basements.

Is it compatible with Apple Home and Matter?

Yes. Shelly Flood Gen4 supports Matter, allowing integration with Apple Home and other Matter-compatible ecosystems.

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