Is the chain tensioner included in the box

455 inches

this means a reliable

ensuring the combustion controller receives a consistent flame rectification signal to prevent nuisance shutdowns and maintain safety protocols

Compressor Protection: Accurately meters refrigerant flow to eliminate liquid carryover

Lochinvar & A.O. Smith 100208332 Sight Glass 321042-401 Is the chain tensioner includedThe Lochinvar & A. O. Smith 100208332 Sight Glass is a critical diagnostic component engineered for high recovery commercial boilers and water heaters. As a veteran technician knows, maintaining a clear line of sight into the combustion chamber is essential for verifying burner flame rectification and overall pilot stability without breaching the sealed system. This OEM replacement part is manufactured from high strength borosilicate glass, providing