In an earlier contribution to this discussion,
John wrote:



I can' believe it is sludge in the radiator as it was taken off a few
years ago - it is upstairs - others (downstairs) were removed a few
months ago (for decorating ) and serious sludge has not been an issue.

However, with such small pipes I do suspect the pipes are restricted.

Not TRV. Lockshield fully open. Pump fine. Boiler upstairs - all
downstairs radiators work well. I suspect that a dip in a pipe could
get sludged up.

I guess I could try my homemade pressure washer - a hose adapter into
the top plug of the radiator. However, with a laminated wood floor I
am a bit paranoid about spilling water.


In that case, I think I'd *still* remove the rad, and flush its pipes
thoroughly. Presumably it's a pressurised system - so you can use mains
pressure to force water through to the valves - opening each valve in turn,
and collecting the resulting gunge in a bucket.

I'd be less worried about spilling a drop of blackish water on laminate that
I would on carpet.
--
Cheers,
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