"Pete Verdon" d wrote in
message ...
Part of the Great Bathroom Rebuild involves fitting a big new towel rail,
and this naturally involved breaking into the (sealed, combi) central
heating circuit.

Empty one rad and pour in X-800.
Follow instruction carefully.
Only takes hours running hot.
Drain system.
Fit new towel rail,
ft a Spirotech Maganboost filter to the CH return pipe of the combi.
Flush system twice,
fill run pump and drain and do it twice.
Fill with X-100 inhibitor.
Each month empty filter (DIY job using a bucket.
Then when clean every year.