The 5/32" outer diameter tubing is optimized for standard pneumatic fittings

While some mounting patterns may appear similar across generations

How do the auxiliary circuits work

For technical accuracy

fitting E1EH and E1EB series electric furnaces

Lochinvar & A.O. Smith 100112662 High Limit Els PW 29614 The 5/32" outer diameter tubingThe Lochinvar & A. O. Smith 100112662 High Limit is a critical OEM safety control designed to prevent terminal damage in high output commercial and residential heating systems. Engineered for hydronic boilers and gas water heaters, this 165 degree limit switch monitors internal temperatures and breaks the electrical circuit if limits are exceeded. As a manual reset safety switch, it requires technician intervention to investigate the root cause of an