Bell & Gossett SX-0463186 Airtrol Tank Fitting

The **Bell & Gossett SX-0463186 Airtrol Tank Fitting** is a high-performance replacement part designed to optimize hydronic system efficiency. Engineered for systems with a **maximum operating pressure of 175 PSI** and a **temperature rating up to 250°F**, this fitting ensures reliable operation in demanding environments. Its primary function is to establish and maintain the proper initial liquid level in expansion tanks during system filling, while also regulating pressurization by venting released air and allowing cooler liquid to flow back to the boiler during off cycles.

Ideal for both new installations and replacements, this Airtrol Fitting is built to meet the rigorous standards of commercial and residential hydronic systems. Compatibility with Bell & Gossett’s XYLEM series (part #45649) makes it a seamless upgrade or repair solution. Whether you’re maintaining system integrity or troubleshooting air-related issues, this fitting delivers dependable performance for long-term reliability.