In the low-efficiency type C boiler, the air pressure switch detects the operation of the flue fan (exhaust fan). It consists of two tubes connected to the venturi ports of the extractor, functioning as pressure and vacuum sensors.
Before 1994, boilers were equipped with this type of valve for safety in the water supply circuit. Today, modern storage boilers integrate this valve into the cold water inlet group within the boiler.
The water meter in a residence is an indispensable tool for the supplier company to account for water consumption for a user.
The gas meter has undergone several modifications over time, including the introduction of integrated batteries, self-reading capabilities, and protection in the event of an earthquake. Despite these technological upgrades, users can still take readings using a few buttons.