Worcester 24 combi problem?

ignore the previous answer....rubbish

if you have a combi there is only one way water can get cross contaminated and by your post you do not have that problem you would be reporting something else...it is simply carbon dioxide in the water from when the boiler heats the water ...more common in hard water areas

corgi bloke
July 2008

you have a valve which you open to top the boiler up, at other end of filling loop fit a non return valve,you now have to open the valve every time you top up with water

AKA
July 2008