Williams 8915 Conversion Kit

The Williams 8915 Conversion Kit is a field-proven solution for converting 25096A Series Monterey Plus Top Vent Furnaces from liquid propane (LP) to natural gas. Designed specifically for Williams units manufactured after 2013, this high-performance kit ensures your heating system maintains proper manifold pressure and orifice alignment. It is engineered for use with Williams brand gas valves to facilitate a secure, leak-free transition. Utilizing an LP to Nat Gas conversion allows contractors to adapt existing hardware to municipal fuel lines while maintaining the specific BTU output required for 25,000 BTU models. This kit includes the necessary main burner orifices and pressure regulator components to ensure the system operates within the 5.0" to 7.0" W.C. range. For technicians and installers, confirming the serial number (digits 3 and 4) is critical to ensuring compatibility with the post-2013 design specifications of the Monterey Plus furnace lineup to prevent pilot-to-burner misalignment or carbon monoxide production.

• Direct OEM Compatibility: Specifically engineered for the Williams 8915 and the 25096A series chassis with Williams valves.
• Precision Metering: Includes precisely drilled orifices to maintain the factory-rated 25,000 BTU input on natural gas.
• Reliable Regulation: The provided pressure regulator kit ensures stable gas flow at the required 5" W.C. manifold pressure.
• Comprehensive Components: Comes with the conversion tags and labels necessary to meet code requirements for fuel-converted appliances.

Is this kit compatible with models manufactured before 2013?
This specific kit is intended for units manufactured in 2013 or later. Check your serial number's 3rd and 4th digits to confirm the production year before installation.

Can I use this kit on a Robertshaw or other third-party gas valve?
No, Williams conversion kits are designed exclusively for use with original Williams brand gas valves. Installing this hardware on a different valve brand can cause dangerous malfunctions.

What is the required inlet pressure for this conversion?
For natural gas operation, the minimum inlet supply pressure is 5.0" W.C., and the maximum must not exceed 7.0" W.C. to ensure the internal regulator functions correctly.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.