Navien Silicone Tube 20010120A

The Navien silicone tube, part number 20010120A, is a flexible silicone hose used in the internal assembly of Navien NCB-CE ERP boilers. Silicone is specified for this application because it stays flexible and resists the temperatures and ageing that affect rubber tubing in service. It is a service part, not a universal hose, and is listed by Navien against specific NCB-CE models.

• The tube has hardened or gone brittle, losing the flexibility it had when fitted.
• Visible cracks, splits or perishing along the tube wall.
• Weeping or dripping at the tube ends or where it connects.
• Discolouration, swelling or a flattened, collapsed section.
• Traces of water staining or residue around the tube's route inside the casing.

• Confirm your appliance is one of the NCB-CE ERP models listed above.
• Check the model and serial number on the boiler's data badge against the fitment list.
• Match the part number 20010120A to the number shown in the manufacturer's parts list for your appliance.
• Inspect the tube's connection points before ordering, as leaks at the joints can come from the fitting rather than the tube itself.