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The expansion vessel is a tank that is used to protect closed systems from pressure surges. The tank is filled with air that acts as a cushion against surges in pressure within the system.
This part is present in 16 different boilers in the Worcester range including the Worcester 24I NG, 24I LPG, 28I NG, 28I LPG, Greenstar 12I system.
If none of these models match the appliance you have, please contact us before ordering so we can confirm this part is compatible.
We recommend that all parts are fitted by a fully qualified gas safe certified engineer. If you require any help finding a part, please feel free to contact us.
- Genuine Worcester Bosch spare part
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Quick Reference: 7988