10L Heating Expansion Vessel – Grey – Part No. 425890

Function:

• Designed to absorb pressure changes in sealed heating systems

• Helps prevent overpressure conditions and maintains system balance

Specifications:

• Capacity: 10 Litres

• Colour: Grey

• Washer included for easy installation

• Compatible with standard ¾" connection (check installation manual for exact sizing)

Compatibility:
Suitable for most sealed heating systems, including the following Nibe models:

• Nibe F370

• Nibe F470

• Nibe F750

Common Fault Indicators:

• Loss of vessel pressure

• Vessel filled with water (no air cushion)

• High-pressure (HP) alarms on system controller

• Radiators or heating circuit showing signs of overpressure or air locks

Application:

• Ideal as a direct replacement for faulty or saturated expansion vessels

• Routine check and replacement recommended during annual service of heat pump systems