Safe-T-Alert 25-742-WT-TR Combo LP & CO Alarm
Updated June 17, 2026
The Safe-T-Alert 25-742-WT-TR is a flush-mount combination alarm that detects both propane (LP) gas and carbon monoxide (CO). Designed for the rugged RV, trailer, and marine environment, it is a 12-volt hardwired unit that upgrades older single-propane alarms to dual protection. The alarm features a mute button to silence alerts while ventilating and includes a trim ring for a clean installation.
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How It Works
The unit uses separate sensors for propane and carbon monoxide. When either gas reaches a dangerous concentration, the alarm emits a loud beeping pattern. The mute button temporarily silences the alarm while the area is ventilated. The alarm is listed to UL 2034 for residential, RV, and marine use, ensuring it meets safety standards for these applications.
Common Failure Symptoms
Like all gas alarms, the Safe-T-Alert has a limited sensor life, typically 5 years. After this period, the unit may produce false alarms or fail to alert. End-of-life is often indicated by a chirping pattern or a specific LED signal. Sensor contamination from dust, insects, or harsh chemicals can also cause erratic behavior. Regular weekly testing and replacement every 5 years are recommended.
Installation Notes
The alarm is designed for flush mounting in a standard cutout. It requires a 12-volt DC power source (hardwired). The included trim ring covers the cutout edges for a finished look. Mount the alarm away from vents, windows, and appliances to avoid false readings. Follow the manufacturer's instructions for proper placement and wiring.
