Water Leak Protection: Step-by-Step Aqara System

Cost of Flooding Below

Tashkent insurance stats:

Neighbor's ceiling/walls: 5-15M UZS

Floor, screed, waterproofing: 8-25M

Electrical: 2-5M

Equipment: 5-30M

Average: 15-25M. Any leak protection pays back on first event.

Risk Sources

LocationProbabilityDamage Washing machineVery highHose, pump DishwasherHighHose, jets SinkMediumSiphon, hose Toilet tankLow but heavyFlex hose RadiatorLow, seasonalFittings Main pipeVery low, catastrophicPipe burst

Aqara Scheme

3 parts: SW-S02D leak sensors + motorized ball valve + Aqara M100 hub.

Sensor 1-2 sec → hub closes valve → notifications.

Sensor Count

RoomCountWhere Kitchen1-2Under sink + dishwasher Bathroom1-2Under sink + washer Toilet1Behind toilet Filter closet1Under main filter

Min 4 covers 95% cases.

Valve Placement

Motorized ball valves on the main, before all consumers — one cold, one hot. Best near riser.

Budget

Min (1.5M): M100 + 4× SW-S02D (alerts only)

Full (4-5M): + 2 motorized valves + install (auto shutoff)

Premium (8M): + more sensors + battery backup

Real Case

80 m² apt, 2 bathrooms:

M100 in hallway

4 sensors at risk points

2 motorized valves

4.2M + 350k install

Triggered once in 18 months. Washer hose burst, valve closed, found 50×50cm puddle instead of flooded neighbors. Saved ~15-20M.

Scenarios

Basic — any sensor → close both + push

Double-check — wait 5 sec (avoid false from dish splashes)

Night — 22:00-7:00 → close + Alice voice call + corridor light

Vacation — auto-close when away >1 day

Pitfalls

Valves need 220V (electrician)

Power outage = no closing → add UPS

Sensor batteries — check every 6 months

False close while traveling = water off until manual reopen

Step on sensor = false trigger; place carefully

Checklist

☐ M100 hub in center

☐ 4+ sensors at risk zones

☐ Motorized valves cold + hot

☐ Electrical for valves

☐ Scenarios (incl night)

☐ Push test

☐ Vacation scenario

☐ Wet rag trigger test

Alternatives

Sonoff Hydro — 1.5× cheaper

Tuya Smart — varied quality

Pro WaterStop — for private homes

For apartments, Aqara wins.

Bottom Line

Min kit (sensors only) 1.5-2M = alerts

Full auto 4-5M = solved

Triggers 1× per 1-3 years, pays for itself first time

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