Weil McLain 590-318-042 Gas Valve to Adapter Pipe O-Ring

The Weil-McLain 590-318-042 is a genuine OEM replacement O-ring designed to seal the connection between the gas valve and the adapter pipe on Weil-McLain boilers. This critical sealing component helps maintain a gas-tight joint at the valve-to-adapter interface, preventing leaks and ensuring safe, reliable boiler operation.

Key Features:

• Genuine Weil-McLain OEM replacement part
• Seals the gas valve-to-adapter pipe connection
• Cross-references Honeywell part number CPOR020156/B
• Direct OEM fit — no modification required
• Essential for maintaining a safe, leak-free gas connection

Replacing a worn or damaged O-ring at the gas valve-to-adapter pipe joint is an important maintenance step when servicing Weil-McLain boilers. Using a genuine OEM part ensures proper material compatibility and a reliable seal for long-term performance.