Flue pressure switch 10-20 Pa De Dietrich 7698349

The flue pressure switch set to 10-20 Pa is a safety device that monitors the pressure difference in the flue gas path of a boiler or burner. It ensures that combustion gases are being properly expelled and triggers a shutdown if the flue is blocked or the fan fails. This component is vital for safe operation and compliance with regulations, making it a common replacement part during servicing.