15 year old potterton netaheat boiler has been quietly kellting for a few years. As I have cleaned to CH system and refilled with preventatives over the years, it makes it slightly quieter for a while but always comes back. It is a hard water area and the system wasn't treated by the builders or me for about first 5 years and onviously when I've drained the system for cleaning, the pipes down to the boiler and the heat exchanger itself never empty as they act like a sump. So, I assume I have a lot of dead scale etc in the heat exchanger causing the problem.
At the botom of the heat exchanger there is about 2 inches of what looks like a drain pipe with an end stop fitted, I assum this is threaded. If so, this would potentially allow the heat exchanges to be drained and flushed. Anyone have any experience of doing this or why it shouldn't be attempted e.g. is it more than just a threaded refit of the end stop to ensure heat exchanger integrity ?
At the botom of the heat exchanger there is about 2 inches of what looks like a drain pipe with an end stop fitted, I assum this is threaded. If so, this would potentially allow the heat exchanges to be drained and flushed. Anyone have any experience of doing this or why it shouldn't be attempted e.g. is it more than just a threaded refit of the end stop to ensure heat exchanger integrity ?
