RO and Water Purifier Alerts: A Small Automation with a Real Payoff

Most households track RO filter replacement by a rough time estimate or by noticing a change in water taste — neither is a reliable indicator of when a filter genuinely needs replacing, and by the time taste changes noticeably, filtration quality may have already degraded meaningfully.

A connected purifier or add-on sensor can track actual usage and send an alert when filter replacement is genuinely due, based on real consumption rather than a rough calendar guess, and can flag faults (a failed pump, a leak) immediately rather than being discovered days later.

It's a small, low-cost piece of a broader home automation project, but it addresses something that genuinely affects daily health and convenience — clean drinking water — and is easy to bundle into a home automation project already covering other sensors and monitoring, rather than treated as a separate purchase.