meaning once the temperature exceeds the 700°F threshold

and R405 IID models

preventing flood-back

as an SPST open-on-rise control

Standardized Threading: Equipped with 3/4" NPT connections for seamless integration into existing gas train assemblies

Laars Heating Systems 2400-040 Flame Holder Assembly 320788-702 meaning once the temperature exceedsThe Laars Heating Systems 2400 040 Flame Holder Assembly is a critical OEM combustion component engineered for high efficiency thermal performance in H, HW, and HP series boilers. Designed to stabilize the burner flame and ensure uniform heat distribution across the heat exchanger, this assembly is vital for maintaining the combustion efficiency required in commercial and residential hydronic applications. The 2400 040 features a robust flame holder