Lochinvar & A.O. Smith 100263840 Valve

The Lochinvar & A.O. Smith 100263840 Valve is a professional-grade 2 inch brass drain valve designed for heavy-duty commercial and residential water heating systems. As an authentic OEM replacement part, this full port ball valve ensures maximum flow rates during system flushing, effectively clearing out the scale and sediment that compromise heat transfer efficiency. Engineered from high-quality corrosion-resistant brass, it provides a robust alternative to standard plastic drains that are prone to cracking and thermal fatigue. The 100263840 is a critical component for maintaining hydronic heating systems and commercial boilers, offering a reliable, leak-free seal and smooth quarter-turn operation. For contractors, this water heater drain valve is the standard for long-term durability in high-cycle environments. Whether you are performing routine maintenance or a full system overhaul, using this 100263840 brass ball valve ensures compatibility with A.O. Smith and Lochinvar units while meeting the strict pressure and temperature requirements of professional plumbing applications.

• Full Port Design: Enables high-velocity drainage to effectively evacuate tank sediment and mineral buildup.
• Industrial-Grade Brass: Provides superior thermal resistance and prevents the stripping or cracking common with composite valves.
• Quarter-Turn Operation: Features a ball valve mechanism for quick, easy shut-off and reliable sealing over time.
• Genuine OEM Fit: Specifically engineered for Lochinvar and A.O. Smith units, ensuring precise thread alignment and a secure, no-leak installation.

What fits the 100263840 drain valve?
This 2-inch NPT valve is a direct replacement for various Lochinvar and A.O. Smith commercial water heaters and boilers. It replaces several legacy part numbers including 9009084015 and 9001870015.

Can I replace a plastic drain valve with this brass version?
Yes. Transitioning to a brass drain valve is a recommended upgrade for technicians looking to improve the serviceability and longevity of a tank, as brass resists the degradation typically seen in plastic components under high-heat conditions.

What tools are needed for installation?
A standard pipe wrench and high-quality PTFE thread sealant or pipe dope are required to ensure a pressure-tight connection to the tank nipple.

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.