ThirdReality Zigbee Water Leak Sensor

Quick verdict

Simple, cheap, and reliable — exactly what you want from a water leak sensor. Scatter these under every sink, behind the dishwasher, and near the water heater. They pair easily with zigbee2mqtt or ZHA and run fully local. No fancy features, just solid leak detection at a price that lets you cover your whole home.

Standout: Ultra-affordable Zigbee water leak detection — cheap enough to put one everywhere water could be a problem.

Last checked: 2026-03-25

Compatibility snapshot

Why it stands out

• very affordable — buy multiples to cover every leak-prone spot
• reliable Zigbee compatibility with zigbee2mqtt and ZHA
• long battery life with standard batteries

Reasons to hesitate

• detection only — no automatic water shutoff capability
• requires a Zigbee coordinator
• basic feature set with no temperature or humidity sensing

Best for

• scattering cheap leak detectors under sinks, water heaters, and washing machines
• Zigbee Home Assistant setups needing affordable water leak monitoring

Avoid if

• you want integrated water shutoff valve control
• you have no Zigbee coordinator

Privacy and local-control notes

Pure Zigbee sensor with no cloud dependency. Fully local through zigbee2mqtt or ZHA.

Home Assistant support: supported · integration path: zigbee2mqtt / ZHA.

Buying reality check

Price notes: Very budget-friendly, especially in multi-packs. One of the cheapest Zigbee leak sensors.

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