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The "BX" suffix indicates updated manufacturing
331-09168-000
Designed for vacuum service to 29 in
Optimized Combustion: Precision-balanced impellers eliminate vibration and provide stable airflow for consistent flame signals and high-efficiency operation
maintaining system head pressure within design parameters during peak summer loads
Lochinvar & A.O. Smith 100110013 Pressure Switch L99H008 The "BX" suffix indicates updatedThe Lochinvar and A. O. Smith 100110013 Pressure Switch is a critical safety component designed for precise combustion air monitoring in high efficiency water heaters and boilers. This differential air pressure switch is calibrated to detect proper draft conditions, ensuring the blower motor is moving sufficient air before allowing the ignition sequence to proceed. Engineered as a direct OEM replacement part, the 100110013 replaces legacy part numbers