Weil McLain 381-354-527 Replacement Kit

The Weil McLain 381-354-527 Section Replacement Kit is a critical OEM boiler part designed for technicians performing cast iron boiler repair on specific gas-fired residential units. This technical kit provides the essential seals and sealant required to rebuild a single joint between boiler sections, ensuring a gas-tight and water-tight pressure vessel assembly. Engineered for compatibility with Weil McLain CGa, CGi, CGs, and GV series boilers, this kit addresses common combustion chamber leaks and heat exchanger failures. Using genuine Weil McLain replacement parts maintains the original equipment’s efficiency ratings and structural integrity. For veteran contractors, this kit simplifies the teardown and reassembly of the heat exchanger block by providing high-temperature retort cement and specialized square-cut seals that withstand rigorous thermal cycling. Proper installation of this boiler section kit prevents hazardous flue gas bypass and costly water damage to the hydronic heating system components.

• Universal Series Compatibility: Precision-fit for Weil McLain CG, CGa, CGi, CGs, CGx, and CGT gas boilers.
• Complete Joint Solution: Includes high-grade boiler seals and sealant to serviced one full block connection.
• OEM Engineering: Ensures factory-standard compression and thermal expansion tolerances are met during reassembly.
• Reduced Downtime: Eliminates the need for sourcing individual gaskets or generic sealants during critical heating season repairs.
• Reliability: Heavy-duty materials designed specifically for the high-temperature environment of cast iron heat exchangers.

Does this kit include more than one seal?

The 381-354-527 kit is designed to provide all the necessary sealing components for one (1) joint between two sections. If your repair involves multiple sections (e.g., rebuilding a 4-section block), you will need to purchase a kit for each joint encountered.

Which boiler models is this kit compatible with?

This kit is primarily used for atmospheric and induced draft gas boilers, including the Gold CGa, CGi Series, and various legacy CG and GV models. Always verify your specific boiler serial number and section assembly drawing before proceeding.

Can I use standard RTV silicone instead of the included sealant?

No. This kit includes specialized retort cement and square-cut seals rated for the high-temperature and chemical conditions within the boiler sections. Using non-specified sealants can cause premature failure and combustion leaks.

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.