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The expansion vessel is a chamber that is used to protect water heating systems from excessive pressure. The pressure vessel is filled with air that acts as a cushion against pressure surges within the system.
Part No: 1123026 / MPN: 430171
£207.60 inc VAT
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Part No: 1127919 / MPN: 5140179
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Part No: 1122958 / MPN: 43000701
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Part No: 1123023 / MPN: 430158
Sorry, this part is now obsolete
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Part No: 1122957 / MPN: 430007