A smart shut-off valve actuator (model SM103) that mounts over an existing manual water or gas valve and rotates the handle electrically on command. Combined with our smart leak detector, automatically closes the supply within seconds of a leak being detected – preventing the kind of water damage that causes thousands of pounds in property damage claims every year.
Two variants available:
- WiFi variant – direct connection to your home WiFi via Tuya / SmartLife. No hub needed. Voice control via Alexa and Google Home.
- Zigbee variant – local control via Home Assistant (Zigbee2MQTT / ZHA), SmartThings, Hubitat or any Zigbee 3.0 hub. No cloud dependency.
Why a smart shut-off valve matters
Escape of water is the #1 cause of UK domestic insurance claims by frequency and the most common source of large repair bills. Typical causes:
- Burst washing machine or dishwasher hose
- Frozen pipe rupture (winter freeze-thaw)
- Failed cold water storage tank float valve in the loft
- Bathroom flexi-hose failure on basin or shower
- Boiler condensate drain blockage
- Toilet inlet overflow
A leak detector alone gives you a phone notification, but you still have to be home (or call someone home) to close the mains. The smart valve eliminates that gap: detection and shut-off happen automatically, in seconds.
How the automation works
- Smart leak detector (placed under sink, behind washing machine, near boiler, etc.) detects water and reports to your hub.
- Hub triggers an automation: “leak sensor wet → close shut-off valve”.
- Valve receives the command and mechanically rotates the existing manual valve handle to the closed position.
- Optional: phone notification, smart speaker announcement, smart lights flashing red.
End-to-end response from detection to valve closed is typically 3-8 seconds.
Installation
The valve clamps over an existing manual ball valve handle – does not require cutting into the pipe. Compatible with standard UK 1/2″, 3/4″, and 1″ ball valves (specific variant determines size). Installation steps:
- Identify the manual shut-off valve to fit it on (water mains stopcock, gas inlet valve, or appliance isolation valve).
- Position the actuator unit over the existing valve handle.
- Tighten the mounting clamp around the pipe.
- Power the unit using the supplied USB cable (USB plug not included).
- Pair to your hub (Zigbee variant) or WiFi (WiFi variant) following the pairing procedure.
No plumbing work needed. No certified gas engineer required for fitting (the valve does not interrupt the gas line itself – it only operates the existing handle).
Gas valve note
Suitable for low-pressure domestic gas applications where a remote-operated shut-off is required (e.g. integration with a smart gas leak sensor). Always verify suitability with your gas supplier or a Gas Safe registered engineer before installation. The actuator operates an existing manual valve – it is not itself a gas-rated valve.
So far no problems