Norman wrote:

Been having problems with my heating system, downstairs rads not heating up
etc so thought of power flushing it.
Does anyone know if you can hire the units anywhere?
Had a quick look on the tool hire sites but can't see them anywhere.

For starters, one of the largest (the largest?) is HSS - they do one:
http://www.hss.com/g/51610/Central_Heating_Flusher.html

David