blocked cold feed - after reading the FAQs and from what I know already - if when venting radiators (usually top floor/higher ones) water doesn't come out with any force - and can also be dark in colour and thickish. But does the F & E cistern height have anything to do with this .... and is hot water always affected?
The cure if there is circulation is X400 followed by x100 i presume, but if a cold feed is blocked so bad that no circulation is happening - then the pipe will need to be cut out, blockage removed, and pipe replaced (using compression fittings is best i believe)? the only thing is, how do you know if the pipe is 100% blocked? anyway of testing? (magnet on pipe)??
The cure if there is circulation is X400 followed by x100 i presume, but if a cold feed is blocked so bad that no circulation is happening - then the pipe will need to be cut out, blockage removed, and pipe replaced (using compression fittings is best i believe)? the only thing is, how do you know if the pipe is 100% blocked? anyway of testing? (magnet on pipe)??