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the assembly likely has internal obstructions or port degradation
you can typically replace it without opening the hydronic lines
as a direct supersession for the 316158-001
Durable Construction: Forged brass body with stainless steel trim offers longevity in demanding HVAC environments
ensuring proportional action relay performance without the need for extensive recalibration or piping modifications
Markel 26158006 Motor R-449A the assembly likely has internalThe Markel 26158006 Motor is a high performance 277V replacement motor engineered for heavy duty industrial heating applications. Specifically designed for compatibility with Markel 33XX series heaters and 4800W units, this 1 50 HP shaded pole motor operates at a nominal 900 RPM to ensure consistent airflow and optimal thermal distribution. It serves as a direct OEM component for TPI Corporation, Raywall, and Markel wall heaters, making it a critical
