Weil McLain 590-317-305 Gasket

The Weil McLain 590-317-305 is a professional-grade woven fiberglass gasket specifically engineered for high-temperature sealing on cleanout plates. Designed to maintain an airtight and gas-tight seal, this gasket prevents combustion byproduct leakage and ensures pressure integrity within the boiler heat exchanger. Measuring approximately 2.0 x 0.25 x 14.5 inches, this component is built to withstand the rigorous cycling associated with residential and commercial hydronic heating systems. Using a replacement boiler gasket that meets exact OEM specifications is critical for maintaining flue gas safety and system efficiency. This fiberglass cleanout plate gasket offers superior chemical resistance and thermal stability compared to generic alternatives. When performing annual maintenance or a heat exchanger inspection, replacing the cleanout plate seal is a standard best practice to prevent carbon monoxide leaks and ensure the vacuum pressure remains within manufacturer tolerances. Trust the 590-317-305 gasket for a precise fit on compatible Weil McLain boiler sections.

• High-Temperature Durability: The woven fiberglass construction is rated for extreme thermal environments, ensuring the seal does not degrade under localized heat stress.
• Precision Fit: Sized at 14.5 inches in length to provide full perimeter coverage of the cleanout port for a total gas-tight interface.
• Leak Prevention: Acts as a critical barrier against flue gas bypass, protecting the mechanical room from combustion odors and hazardous exhaust.
• Chemical Resistance: Designed to resist the corrosive effects of condensate and combustion residues found in modern hydronic systems.

• When should this gasket be replaced? Technicians should replace the 590-317-305 whenever the cleanout plate is removed for heat exchanger cleaning or if soot spotting is visible around the plate edges.
• Is it compatible with other brands? This gasket is specifically spec'd for Weil McLain boiler maintenance; always verify your specific model's parts list to ensure the dimensions match your cleanout assembly.
• Does this require adhesive? While the woven material provides a natural friction fit against the plate, ensure the sealing surface is wire-brushed clean for the best metal-to-gasket contact.

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.