A float detects water level and activates the alarm.
Water flow alarm system.
Air is compressible so when water pressure goes up due to city water pressure changes water does flow into the system.
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Home water leak detector systems trigger a water sensor alarm if they detect moisture in a location that should be dry.
Alarm has a plastic housing that meets nema 3r for protection from dirt falling liquids and light splashing.
Some leak detectors also monitor for changes in acoustics.
An alarm and a red light alert you when water levels rise too high.
Why are there waterflow alarms when no water is flowing.