A car one, that is - not central heating.

I've a feeling the one on the old Rover may be a bit blocked. The main rad
has been replaced - but not the heater one. And it's not easy to remove.
What would be a suitable chemical to clear it? Likely just the scale from
hard tap water, as it's had 'aluminium' anti-freeze/inhibitor in it all
its life and the engine water jacket is perfect. It's made of copper with
possibly steel pipes feeding it.

I'd rather not fill the whole system with a de-scaler, but just the heater
rad after disconnecting the hoses feeding it. So something that works cold
would be best.

--
*Never underestimate the power of stupid people in large groups

Dave Plowman London SW
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