Worcester Expansion Vessel 6 Litre – Refurbished | MPN 8716117023

Controlling pressure inside a sealed heating system is a continuous job — and the Worcester Expansion Vessel (MPN 8716117023) is the component that handles it. As water heats up and expands within your boiler's circuit, this vessel absorbs the resulting pressure changes, preventing excess build-up that could otherwise place stress on internal components and lead to leaks or faults over time.

With a 6-litre capacity, this part fits precisely in place of the original component, restoring smooth, safe boiler operation as a direct like-for-like replacement — no modifications, no complications.

This is a professionally refurbished genuine Worcester component, carefully tested for durability and reliability before dispatch, offering a cost-saving, eco-friendly alternative to a brand-new part without compromising on performance.

• Durable Worcester expansion vessel for efficient pressure regulation
• Part number 8716117023, manufactured by Worcester Bosch
• Fully refurbished and New -compitable
• Includes a 12-month warranty for extra reassurance
• Compatible with multiple Greenstar i Combi and System ERP boilers
  
  

  GC Number : 

  Model	GC Number
  Greenstar 25i Combi ERP	47-406-60 (7733600012)
  Greenstar 25i Combi ERP LPG	47-406-61 (7733600031)
  Greenstar 30i Combi ERP	47-406-62 (7733600005)
  Greenstar 30i Combi ERP LPG	47-406-63 (7733600032)
  Greenstar 9i System ERP	41-406-21 (7733600011)
  Greenstar 9i System ERP LPG	41-406-22 (7733600033)
  Greenstar 12i System ERP	41-406-23 (7733600010)
  Greenstar 12i System ERP LPG	41-406-24 (7733600034)
  Greenstar 15i System ERP	41-406-25 (7733600009)
  Greenstar 15i System ERP LPG	41-406-26 (7733600035)
  Greenstar 18i System ERP	41-406-27 (7733600008)
  Greenstar 18i System ERP LPG	41-406-28 (7733600036)
  Greenstar 21i System ERP	41-406-29 (7733600007)
  Greenstar 21i System ERP LPG	41-406-30 (7733600037)
  Greenstar 24i System ERP	41-406-31 (7733600006)
  Greenstar 24i System ERP LPG	41-406-32 (7733600038)

  
  

Tested for Durability. Trusted for Reliability.

Every unit is carefully tested to confirm it keeps your boiler's pressure balanced and reduces the risk of leaks or pressure-related faults. Whether you're carrying out routine maintenance or resolving a specific repair, this refurbished vessel delivers dependable, long-term performance at a fraction of the cost of buying new — backed by a full 12-month warranty for added peace of mind.

Delivery & Returns

Orders placed before 3:00 PM are dispatched the same working day with tracked delivery, with both standard and next working day delivery options available at checkout. Returns accepted within 30 days, provided the part is unused and in its original packaging.

Note: Please confirm that MPN 8716117023 matches your existing part before placing your order. Installation must always be carried out by a Gas Safe registered engineer to ensure safety compliance and warranty validity.