Recent content by pbroddle

Namsag, there is no hot water tank in the loft & therefore no ball cock. It is a condensing boiler with an unvented DHW cylinder combined in a single unit, hence the expansion vessel. Cheers, Paul

Hi folks, have an Istor HE325 boiler in a new build. Most problems sorted but 1 remaining... After the boiler has been on for hot water when the first tap is opened to get hot water a very loud vibrationary noise comes from the boiler. On further inspection the pipe from the DHW Expansion...