• Main Combi 30 Eco             GC 47-467-03
• Main Combi 30 Eco Elite   GC 47-467-09
• Main System Eco 28            GC 41-467-12
• Main System Eco Elite 28   GC 41-467-22

Main Expansion Vessel 10L 5114692, this Main Expansion Vessel 10L 5114692 is a small chamber that is used to protect closed water heating systems from pressure surges. The Expansion Vessel is filled with air that acts as a cushion against pressure surges within the system. Some engineers refer to it as Boiler Expansion Tank or boiler expansion vessel. Whenever you replace a faulty or damaged boiler part, it is essential that you use a Genuine and Original Boiler Spare Part. This Expansion Main Expansion Vessel 5114692 is fitted in the Main Eco 30, the Main 30 ECO Elite and Main System Eco 28. Heatingspares247.com is one of the UK's largest independent Boiler Parts & Heating Spares Stockist, serving the whole of UK mainland from their 3,000 sq ft. distribution centre. We specialise in the supply of Genuine & Original Boiler Spares. Services available are trade counter pick up, Next working day, next working day AM and Saturday delivery. We also operate same day express delivery service. Our Opening times are Monday to Saturday, 8AM to 5.30PM Heatingspares247.com is an Approved Boiler Spare Parts Stockist, and we guarantee to supply genuine spares from the boiler manufacturers.