Viessmann tube HV 7828635.
Models this fits
Viessmann WB1B 100-W COMBI 26KW
Viessmann WB1B 100-W SYSTEM 26KW
Order before 2.30pm for next working day delivery (orders placed after 2.30pm will be processed the following working day). Please note if you have ordered an item which is listed as next day delivery with an item which has a longer lead time they will be sent together at the longer lead time.