How often should smoke alarms be replaced?

Start with the age of the alarm

The ten-year period is measured from manufacture, not from the day you moved into the property. If the date is unreadable or the installation history is unknown, arrange an assessment rather than assuming the alarm is current.

Testing is not the same as replacement

A test button checks the alarm’s basic operation at that moment. It does not reset the alarm’s age or prove that its smoke-sensing performance remains suitable indefinitely. Follow the manufacturer’s test and cleaning instructions and replace the unit at the end of its service life.

WA sale, rental and hire requirements

Western Australian requirements for homes being sold, rented or hired include working alarms, specified power arrangements and an age limit. The exact requirements can depend on the building, installation date and circumstances, so the property should be checked against current guidance.

When to arrange licensed help

Arrange help when a mains-powered unit needs replacement, the alarm fails a test, the unit has been disconnected, the location appears unsuitable, interconnection needs assessment, or the property’s compliance status is unclear. Do not paint over, cover or remove an alarm to stop nuisance activations; identify the cause and use the correct alarm solution for the location.