Weil McLain 383-500-120 Natural to Propane Conversion Kit for Boiler - Ultra-230

The Weil McLain 383-500-120 is a factory-approved conversion kit designed to convert Ultra-230 Series gas-fired boilers from natural gas operation to liquid propane (LP) fuel. This kit is specifically engineered for installations at sea level to 5,500 feet altitude and comes supplied with Ultra-230 boilers for field conversion capability.

Key Features:

• Factory-approved conversion kit for Weil-McLain Ultra-230 boilers
• Converts natural gas boilers to propane/LP gas operation
• Designed for installations at elevations up to 5,500 feet
• Includes LP orifice, conversion instructions, and fuel conversion label
• Compatible with Ultra Series 3 and Series 4 boilers rated at 230 MBH input
• Ensures proper gas-to-air ratio for safe, efficient propane combustion

This conversion kit contains all necessary components to safely convert your Ultra-230 boiler to propane fuel, including the properly sized orifice for LP gas delivery, detailed installation instructions, and required labeling to indicate the fuel conversion. For installations above 5,500 feet altitude, use high-altitude conversion kit 383-500-647 instead. Professional installation by a licensed heating contractor is required to ensure proper conversion and maintain warranty coverage.