Lochinvar & A.O. Smith 100110811 Switch 321894-708 and modern blends like R448A

and modern blends like R448A and R449A

This 50-foot coil is engineered specifically for use as pilot gas lines

maintaining the precise operational parameters required for efficient heating cycles and long-term HVAC system protection

ensuring the R-22 scroll compressor meets original equipment specifications

For optimal HVAC pressure sensing

Lochinvar & A.O. Smith 100110811 Switch 321894-708 and modern blends like R448AThe Lochinvar & A. O. Smith 100110811 Blocked Outlet Switch is a critical safety component designed for high efficiency commercial water heaters and boilers, including the Cyclone BTH and Armor series. This OEM pressure switch functions as a normally closed (NC) SPST contact, engineered to monitor flue gas backpressure. If the exhaust venting becomes obstructed or the pressure rises above the calibrated set point, the switch opens, breaking the 24V