This HVAC tube assembly simplifies the installation process for contractors

the A421AEC-01 is engineered for wash-down environments and corrosive atmospheres where standard controls fail

this Factory Authorized Part provides a reliable drop-in solution that eliminates the mounting and wiring headaches often associated with "universal" aftermarket alternatives

Larger valves require specific kits (like the BF-2-KIT) due to different diaphragm chamber clearances

please verify the port logic against other models in the S-2300 series

Lochinvar & A.O. Smith 100277799 Probe 323269-701 This HVAC tube assembly simplifiesThe Lochinvar & A. O. Smith 100277799 Probe is a critical safety component engineered for precision low water cut off (LWCO) monitoring in high efficiency commercial and residential heating systems. Designed to integrate seamlessly with the Lochinvar FBL and FBN series boilers, this probe detects the presence of water via conductivity to prevent dry fire conditions that cause catastrophic heat exchanger failure. As a veteran technician knows,