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Leak sensor prevented me from some pain!
(feddit.org)
Had a leak under the sink in our kitchen. I don’t want to imagine what this would have meant on a larger scale, compared the 20€ I spent on the sensor and the 10mins it costed me to install it.
A few years ago the hose on our washing machine split and we didn’t realise until water started coming out from under the units. Thankfully damage was minimal but it was a big pain to dry out.
I’ve had some of those Aqara leak sensors in place since as a precaution.
Just remember to change the batteries regularly! Easy to forget them when they are out of sight.
Re batteries: You could also set up an automation that periodically checks the status and/or availability of your battery-powered sensors. Here's a useful community blueprint for this: https://community.home-assistant.io/t/low-battery-notifications-actions/653754
I have mine checked once a week.