two stainless steel diaphragms

Integrated Safety: Features an automatic pilot safety valve that provides 100% gas shut-off in the event of pilot outage

preventing catastrophic equipment failure and ensuring safe discharge air temperatures

Always verify the temperature stamping on the old bracket before installation

and visible external leakage through the bonnet seal

Lochinvar & A.O. Smith 100276842 Pressure Switch 320788-704 two stainless steel diaphragmsThe Lochinvar & A. O. Smith 100276842 Pressure Switch is a critical safety component designed to monitor combustion blower performance and ensure proper venting pressure within high efficiency commercial water heaters and boilers. This OEM air pressure switch acts as a fail safe, preventing ignition if the inducer motor fails to establish the correct differential pressure. As the direct 100166151 replacement part, this switch is engineered for high