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Smart Water Leak Detectors & Automatic Shutoff Valves

Smart leak sensors and automatic shutoff valves can prevent catastrophic water damage. Compare Flo by Moen, Phyn, and Honeywell options.

Smart leak detectors alert your phone when moisture is detected — buying you minutes to hours before catastrophic damage. Whole-home shutoff systems (Flo by Moen, Phyn Plus) monitor water flow and automatically shut off the main supply when abnormal usage is detected.

Install sensors near water heaters, washing machines, under sinks, and behind toilets. Whole-home systems cost $500–$900 installed but can prevent $10,000+ damage events. Many insurers offer discounts for leak detection devices.

See our best water leak detector review for top picks tested by restoration professionals.

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Frequently Asked Questions

Do smart leak detectors prevent water damage?
They alert you early — whole-home shutoff systems actively stop water flow. Neither replaces maintenance, but shutoff systems have documented cases of preventing major losses.
Do insurers discount smart leak detectors?
Many carriers offer 3–8% discounts for whole-home leak detection with automatic shutoff. Check with your agent.