plumbing advice sought

if one has 'sludge' (iron oxide??) build up in radiators, whats the best way to sort it? i know you can get this chemical stuff to put in the tank, which then breaks down the sludge, but i think you have to drain the system afterwards- is this right, and what level of hassle is thi likely to cause someone who hasn't done it before?

cheers

Posted By: johnmcdowellshair, Dec 12, 12:51:39