Have just put 2 litres of w w vinegar in boiler and wondered how long i should keep it boiling for, looking at manuels there does not mention how long, what do you all think?. Bye the way the rest is water topping it up to 10 litres.
Hi Roger, Out of interest what came out when you flushed it through?I used a 50:50 mixture (5litres vinegar + 5 litres water) and kept it at full heat (70 degrees) for an hour.