WORCESTER  8716117023

WORCESTER 8716117023

Previous Code: 8-716-117-023



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Buy your Worcester 8716117023 - Greenstar 21i System Erp Expansion Vessel today, with a fast UK delivery..

Previous Worcester Part Codes: 8-716-117-023

The Worcester Greenstar 21i System Erp expansion vessel is a product to handle the expansion of water in a boiler or hot water system due to increases in temperature. When water rises in temperature this expands, particularly when it is kept under pressure such as in a sealed heating system or an unvented hot water cylinder. Expansion vessels typically consist of a storage container or disc which is divided inside into two compartments separated with a rubber sheet, known as the diaphragm. Inside the expansion tanks there is water on one side of the diaphragm and air or an inert gas such as nitrogen under pressure on the other side. An air valve very much like those found on bicycle and car tyres is typically provided within the air side to permit the system to be re-pressurised., Worcester Expansion Vessel Are Dispatched Same Day, For Next Day Delivery


WORCESTER Boiler Spares orders - delivered within 24 hours for all in-stock WORCESTER spare parts, when purchased before 3pm. We also supply many other spare parts and accessories for WORCESTER boilers.


  • Warranty

    WORCESTER spare parts come with manufacturers standard twelve months warranty.

  • Warning

    When replacing any spare part on appliances, use only genuine boiler spare parts that you can be assured conform to the safety and performance specification that the boiler manufacturer recommends. For your safety & your families, please do not use reconditioned or copy parts that have not been clearly authorised by the boiler manufacturer.