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 22 different boilers in the Baxi range including the Baxi Duotec 24 He, Duotec 28 He, Duo-Tec Combi 24 HE A, Duo-Tec Combi 28 HE A.
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|
|Baxi||Duotec 24 He||47-075-23|
|Baxi||Duotec 28 He||47-075-25|
|Baxi||Duo-Tec Combi 24 HE A||47-075-35|
|Baxi||Duo-Tec Combi 28 HE A||47-075-36|
|Baxi||Megaflo 24 HE System||41-075-47|
|Baxi||Megaflo 28 HE System||41-075-48|
|Baxi||Megaflo System 15 HE A||41-075-55|
|Baxi||Megaflo System 18 HE A||41-075-56|
|Baxi||Megaflo System 18 HE IE|
|Baxi||Megaflo System 24 HE A||41-075-57|
|Baxi||Megaflo System 24 HE IE|
|Baxi||Megaflo System 28 HE A||41-075-58|
|Baxi||Megaflo System 28 HE IE|
|Baxi||Megaflo System 32 HE A||41-075-59|
|Baxi||Megaflo System 32 HE IE|
|Baxi||Platinum 24 HE Combi||47-075-27|
|Baxi||Platinum 28 HE Combi||47-077-28|
|Main||Main Combi 25 Eco||47-467-01|
|Potterton||Promax Combi 24HE Plus||47-393-17|
|Potterton||Promax Combi 28HE Plus Sl|
Baxi / Main / Potterton 5114691 Expansion Vessel - 8 Litre Zilmet
|Part Type||Expansion Vessels|