Recent content by WilfW

Thx John, that's understood; a good trick. The Vaillant engineer came and showed what I assumed is the cause of loosing pressure; it was a leak around what look like two valves (screwed to a small vertical steel backplate). He's replacing those and other associated pipes and parts. He seemed...

A Q on a boiler that was installed in 2016, ran fault-free for years, in Dec 23 started loosing pressure / refilled every week > blown expansion vessel replaced under warranty. Same symptoms again Jan 24, same fix. The same again this week, with a little occasional rusty water coming from the...