The expansion vessel is filled with air which acts as a cushion against system pressure surges.
This part is compatible with:24 HE24 HE A33 HEDuo-tec 24 Combi ErPDuo-tec 28 LPG Combi ErP15 HE A System18 HE A System18 HE System24 HE System28 HE A System32 HE A SystemMegaflo System ErP 18
We offer next day delivery on most of our products with free delivery on all orders over £50
We pick all orders received before 3pm same day
We operate a NO QUIBBLE returns policy to give you peace of mind when buying. In the unlikely event that the product you order isn't quite what you wanted then get in touch, post it back & we will process your refund when it arrives back with us