Viessmann boiler failure

[ppppenguin]

Flushing the rads upside down and giving them a good bashing while do so should dislodge plenty of muck.

Once I've got the system to settle down without generating any more sludge and gas I'll buy a spare hose for the boiler and change it after 4 years whether it needs it or not. The original failed after just under 5 years. That way I hope to avoid future floods.