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Question About BRK electronic Smoke Alarm 4120B
Replace 4120B Alarms...

I havea a home with 15 BRK 4120B that i have randomly go off (ie it will start beeping like low battery but then go into full alarm). Replacing batteries does not fix the issue. I want to replace all of the alarms in the house. Do you have newer model that can use the same ceiling mount/hardwire connection?

Asked by John on 02/02/2009 1  Answer

ManualsOnline posted an answer 15 years, 10 months ago

The ManualsOnline team has found the manual for this product! We hope it helps solve your problem. Get the Manual Here

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