Vaillant Ecomax / Ecotec VU GB 656/4-5 Pump – Pre-Owned | Part No. 180929 / 0020211454

The Vaillant Ecotec VU GB 656/4-5 Pump 180929 (0020211454) is a refurbished circulating pump for the Vaillant ecoTEC VU GB 656/4-5 and ecoMAX 665 VU condensing system boilers. Each unit is fully tested and quality-checked before despatch and comes with a 12-month warranty. Only one unit available — limited stock.

When this pump becomes faulty, the boiler experiences reduced or no water circulation, which causes poor heating performance, lockout faults, or system pressure issues. Replacing the pump with this tested refurbished unit restores proper circulation and reliable day-to-day boiler operation.

Compatible Boiler Models

Key Features

• Designed for Vaillant ecoTEC VU GB 656/4-5 and ecoMAX 665 VU boilers
• Restores correct water circulation and stable boiler performance
• Fully tested and quality-checked by in-house certified engineers
• 12-month warranty included
• Cost-effective refurbished alternative to a new OEM pump
• Must be installed by a Gas Safe registered engineer

Please note: Confirm your boiler model matches the list above and verify the part number is 180929 or 0020211454 before ordering. All prices include VAT.