First Alert ADF-12 Adapter Plug Pack for Firex to BRK/First Alert – 12 Count

Effortless hardwired alarm retrofit

Upgrade your existing Firex hardwired smoke alarms to BRK or First Alert units without rewiring. The First Alert ADF-12 adapter plugs sit between the ceiling plug and the detector, providing a clean, plug‑in path that can save time and reduce installation disruption in homes, offices, or small facilities. This practical solution helps you refresh your fire safety system while keeping the familiar ceiling aesthetics and mounting setup intact.

Each adapter is designed for a straightforward connection: insert the three‑pin male connector into the existing Fire ceiling plug, connect the female end to your new BRK or First Alert alarm, and secure the detector in place. The result is a reliable interface that supports a smooth transition from older Firex detectors to newer models, with a focus on simplicity and consistency across multiple units.

Why choose the ADF-12 adapter plugs

• No rewiring required for compatible hardwired alarms, reducing project time and complexity
• Works with a broad range of First Alert, BRK, and Firex alarms, making retrofits more versatile
• Pack includes 12 adapters, sufficient for updating multiple detectors in one project
• Compact design that minimizes intrusion on ceiling hardware and wiring layout
• PDF user manual provides model references and installation guidance for quick start

Compatibility at a glance

The adapters support many popular alarm families, including SC9120B, 4120-series, 9120-series, 7010-series, 5919, 2002RAC, SC6120B, HD6135FB, RM3, and Firex equivalents such as 406 (G-6), 4518 (ADC), 4618 (FADC), 484 (PG-40), 4480 (PAD), 5700 (ADH), and 499. This broad compatibility makes it easier to plan retrofits across multiple devices without buying separate adapters for each model.

In practice, this means you can upgrade several detectors in a single project, preserving existing ceilings and mounting brackets while you refresh the alarm technology. The approach can be especially helpful for updating aging systems in homes with multiple levels or in small commercial spaces where downtime matters and a clean, professional installation is valued.

In the package and installation basics

• 12 smoke alarm adapter plugs
• Individual unit dimensions around 3 x 1 x 1 inches
• Package dimensions about 1.85 x 8.39 x 5.24 inches
• Includes a PDF user manual with compatible model references

Installation tips at a glance: verify compatibility for each detector, power down the circuit before swapping, insert the adapter into the ceiling plug, attach the new alarm via the adapter, and secure the unit in its mounting bracket. If you’re replacing multiple detectors, test each unit after installation to confirm reliable operation. This solution is designed to be a practical upgrade path that keeps your space safe with minimal disruption.