Will this replace a 40-442A C0 detector? (Safe-T-Alert 85-741-WT-TR 85 Series Dual CO & LP Gas Alarm With Trim, White)

Staff Answer

Jul 03, 2026 - 08:10 AM

Yes, the Safe-T-Alert 85-741-WT-TR should work as a replacement/upgrade for your older 40-442A detector. It may not be an exact same-size faceplate swap, but the included trim ring is designed to help cover the old opening/mounting area.

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Will this replace a 40-442A C0 detector?

Safe-T-Alert 85-741-WT-TR 85 Series Dual CO & LP Gas Alarm With Trim, White

The Safe-T-Alert 85-741-WT-TR 85 Series Dual Alarm detects both propane gas and carbon monoxide, upgrading your RV's single propane detector for double the protection. Its slim, low-profile design runs on 12V power with no batteries needed and features an alarm mute button with rapid sensor rese... See More

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