Vaillant 0020025045 Connection tube

The Vaillant 0020025045 Connection Tube is a pipe component used inside Vaillant water heating appliances. It forms part of the internal hydraulic circuit, carrying water between components so the unit can run at its designed flow and pressure. As a Vaillant spare, it is produced to the connection pattern and dimensions the appliance expects, so it seats correctly against the mating parts it serves.

• Water weeping or dripping from the tube body or from either connection end
• Visible corrosion, cracking or heavy scale build-up on the tube surface
• Reduced flow or pressure at the appliance outlet that traces back to the tube
• Loose, deformed or damaged connection ends that will not pull up tight
• Repeated loss of system pressure where the tube or its joints are the source

• Check the appliance model and serial number, then match the existing tube against part number 0020025045
• Confirm the number stamped or printed on the old tube, or an alternative number listed below, before ordering
• Inspect the sealing washers or O-rings at each end of the tube and renew them if they are worn or flattened
• Any work inside the appliance should be carried out by a competent person