The Boiler Inlet Connector is to be replaced or leaking.
If it is damaged your may find leaking or spraying on the back left side of the machine during heat up and brewing.
This is a revised part, better quality component. Part Number 422224777124 do not use old # 422224777123 or 300008825671
You may also require 2 O Rings part no. 996530013564
EP2220/14, EP2230/14, EP3221/44, EP1220/04, EP3241/54, EP5447/94, EP4321/54, EP4347/94, EP2241/44, EP3246/74, EP3241/74, EP0820/04