Smoke Alarm Replacement Service - ALL smoke alarms need replacing after 10 Years Smoke alarm replacement after 10 years all alarms should be changed. If your smoke alarm is beeping its getting old. Smoke detectors now have an expiry date regardless of it being a battery operated or hardwired all smoke alarms need to be replaced after 10 yrs in Public bookmarkswith smoke_alarm_replacement Note: Smoke alarm replacement after 10 years all alarms should be changed. If your smoke alarm is beeping its getting old. Smoke detectors now have an expiry date regardless of it being a battery operated or hardwired all smoke alarms need to be replaced after 10 yrs