Hello ODE, The adapter, KA-F, will work with the old Firex units.
Hello Geoff, Unfortunately they will not. The wiring for the G-6 is different than the FADC series. The adapter will not work.
Hello batman, Yes. The adapter KA=F2 will work with the 120-1182 wiring harness
Hello. We at Kidde don't know. The KA-B2 adaptor that comes with this alarm is made for the wiring harness that came with the First Alert/BRK models 4120, SA4121B, 4919, 5919, and 86RAC. It depends if the wiring harness for the 9120B6cp is the same as these other models I have listed. We want your business but we don't want you to purchase the wrong product and have issues and have to rewire without realizing it. .
Hello Scott, Yes the adapter will work to allow you to use the existing harness.
Hello Ken, The adapter will only work for a few old wiring harnesses from FIREX. The G-6 wiring will NOT work with the adapter for Kidde models. There is no other option but to remove the old FIREX wiring harness and replace with the new Kidde wiring harness. In addition, all of the old FIREX units will need to be removed before any new unit is put onto the circuit as they are not compatible. If you leave any old units on the circuit, once the new is attached the whole circuit will sound.
Hello Ken, There is no adapter for the G-6. The only thing that can be done is to remove the old wiring harness and install the new. Sorry.
Hello Ken, Unfortunately, the adapter will not work with all FIREX models. This one will not work with the adapter. Sorry.
I would say "no". This just allows you to replace aging smoke detectors with newer model detectors without re-wiring. I believe these only work with Kidde and FireX brand. For example I needed them to replace 2001 smoke detectors with 2019 smoke detectors.