Weil McLain 511-210-423 Drain Valve

The Weil McLain 511-210-423 Drain Valve is a heavy-duty brass boiler drain valve engineered specifically for hydronic heating systems. Featuring a rugged 3/4" NPT connection and a 1 1/2" shank, this component ensures a secure, leak-proof interface with the boiler block or distribution manifold. As an authentic Weil McLain replacement part, it is designed to meet exact OEM tolerances, providing contractors with a reliable solution for system flushing and sediment removal during routine maintenance. The high-quality brass construction is selected for its superior corrosion resistance and thermal stability in high-temperature heating applications. In the field, this NPT drain valve proves essential for professional hydronic system maintenance, allowing for efficient drainage without the risk of thread galling or premature seal failure. Whether you are servicing a residential CGa series or a commercial-grade unit, ensuring you have the correct HVAC drain valve is critical for long-term operational efficiency and minimizing callbacks.

• OEM Compatibility: Precision-fit for Weil McLain boiler systems to ensure seamless integration and eliminate sizing errors.
• Corrosion-Resistant Brass: Constructed from high-stability brass to withstand constant exposure to system water and high temperatures.
• Secure Sealing: Standard 3/4 inch NPT threading provides a tight, high-pressure seal against the boiler trim.
• Efficient Serviceability: The 1 1/2 inch shank length provides sufficient clearance for easy tool access and hose attachment.

Is this valve compatible with other boiler brands?
While the 3/4" NPT threading is a standard size, this specific part number is optimized for Weil McLain configurations to match their boiler trim and shank requirements.

Can this be used on both steam and hot water boilers?
Yes, this brass valve is designed to handle the thermal demands of both steam and hydronic water heating environments.

What is the purpose of the 1 1/2" shank?
The extended shank provides the necessary reach to exit the boiler jacket or insulation, allowing for a standard garden hose connection for easy system draining.

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.