Gordon,
Thank you for your prompt reply.
The problem started this summer after we replaced three of our eleven radiators. The central heating system had been trouble free for years.
Does this help? I guess this eliminates pipeword design as a cause and probably pump speed too (although...
Can anyone help me?
Our central heating system loses water every day and we spend ten minutes or so every morning bleeding the top few radiators. We have double checked every pipe run for leaks: nothing.
We then noticed some water escaping from the header tank overflow. We therefore think...