such as flame sensing

the flow must follow the arrow marked on the forged body for correct modulation and to avoid water hammer

some newer Forsaire Direct Vent models utilize different sensor configurations or electronic ignitions

Integrated Safety: Includes a high-grade inlet filtered screen and an automatic pilot safety valve to protect internal components from debris and gas interruptions

Lochinvar & A.O. Smith 100166241 Pressure Switch 320734-701 such as flame sensingThe Lochinvar and A. O. Smith 100166241 Pressure Switch is a critical safety component designed for precise combustion air monitoring in high efficiency water heaters and boilers. This SPDT (Single Pole Double Throw) switch is factory calibrated to a . 21" WC (water column) set point, ensuring the inducer fan generates sufficient static pressure before allowing the ignition sequence to proceed. Engineered as a direct OEM replacement part, it replaces