أنبوب مفتاح الضغط 4.5x8 L-400 أسود من De Dietrich JJJ005411110

This pressure switch tube, measuring 4.5x8 mm and 400 mm in length, is a black flexible tube used to connect pressure switches in gas burner parts and boiler systems. It transmits air pressure to the switch, enabling proper monitoring of combustion air or flue gas pressure. A reliable tube is essential for accurate pressure readings and safe boiler operation. This tube is a standard component in many heating equipment components, and replacing it when cracked or brittle ensures your system runs safely and efficiently.