Napoleon W175-0840 AX42-1 Propane to Natural Gas Conversion Kit

Safe, Factory-Correct Fuel Conversion for Napoleon Fireplaces

The Napoleon W175-0840 (AX42-1) Propane to Natural Gas Conversion Kit is designed to properly convert compatible Napoleon fireplaces from LP (propane) to NG (natural gas). This kit includes the required orifices, fittings, seals, and components needed to ensure correct fuel delivery, stable flame characteristics, and safe combustion after conversion.

Fuel conversions must be performed with precision. This kit is engineered to match Napoleon’s factory gas specifications, allowing your fireplace to operate exactly as intended on natural gas without compromising performance, efficiency, or safety.

Genuine OEM Napoleon Gas Conversion Kit

This is a Genuine OEM Napoleon conversion kit, manufactured specifically for approved Napoleon fireplace models. OEM conversion components ensure correct gas pressure, proper air-to-fuel ratios, and full compatibility with the fireplace’s burner and valve system.

Using a genuine Napoleon kit helps maintain manufacturer compliance and ensures your fireplace continues operating within tested and certified parameters.

Compatible Models

• Napoleon Ascent™ 42 gas fireplaces (LP models approved for NG conversion)
• Napoleon AX42 configurations listed in manufacturer conversion documentation