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The Watts 0066605 ETX-15 is a professional-grade non-potable thermal expansion tank designed for closed-loop hydronic heating systems
the 47-6223 is the official updated service replacement part
Refined Fit: Designed to integrate seamlessly with the coil’s footprint to maintain airtight seals and airflow efficiency
120/240 Vac
Common Technical Questions: What is the primary cause of coil burnout on an RK3B2
Lochinvar & A.O. Smith 100109913 Gas Valve 324846-701 The Watts 0066605 ETX-15 isThe Lochinvar & A. O. Smith 100109913 Gas Valve is a 24V slow opening natural gas valve engineered for precision fuel regulation in commercial water heaters and boilers. Designed with a 3 4" NPT inlet and outlet, this combination gas valve serves as a critical component for maintaining stable manifold pressure, factory preset at 3. 5" W. C. to ensure optimal combustion efficiency. This OEM replacement gas valve is a direct substitute for the A. O.
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