An expansion tank or expansion vessel is a small tank used to protect closed (not open to atmospheric pressure) water heating systems and domestic hot water systems from excessive pressure. The tank is partially filled with air, whose compressibility cushions shock caused by water hammer and absorbs excess water pressure caused by thermal expansion.
This part is present 14 different boilers in the Viessmann range including the Viessmann Vitodens 200 WB2B 19KW System - 7248823, Vitodens 200 WB2B 26KW Combi - 7248825, Vitodens 200 WB2B 26KW System - 7248824, Vitodens 200 WB2B 30KW Combi - 7248827.
At the bottom of the page is an appliance table with the links to all boilers that contain this part. Please use this if you would like to view all other spares that fit that model by clicking on your appliance model and download the user manual for that appliance. 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 Registered Engineer. If you require any help locating a part, please feel free to contact us.
|Manufacturer||Appliance Model||GC Number|
|Viessmann||Vitodens 200 WB2B 19KW System - 7248823||7248823|
|Viessmann||Vitodens 200 WB2B 26KW Combi - 7248825||7248825|
|Viessmann||Vitodens 200 WB2B 26KW System - 7248824||7248824|
|Viessmann||Vitodens 200 WB2B 30KW Combi - 7248827||7248827|
|Viessmann||Vitodens 200 WB2B 30KW System - 7248826||7248826|
|Viessmann||Vitodens 200 WB2B 35KW Combi - 7248829||7248829|
|Viessmann||Vitodens 200 WB2B 35KW System - 7248828||7248828|
|Viessmann||Vitodens 200 WB2C 19KW System - 7424985||7424985|
|Viessmann||Vitodens 200 WB2C 26KW Combi - 7424987||7424987|
|Viessmann||Vitodens 200 WB2C 26KW System - 7424986||7424986|
|Viessmann||Vitodens 200 WB2C 30KW Combi - 7424989||7424989|
|Viessmann||Vitodens 200 WB2C 30KW System - 7424988||7424988|
|Viessmann||Vitodens 200 WB2C 35KW Combi - 7424991||7424991|
|Viessmann||Vitodens 200 WB2C 35KW System - 7424990||7424990|
Viessmann 7826473 Expansion Vessel
|Part Type||Expansion Vessels|