Milky hot water. Recently had a Viessmann 100-W combi boiler installed. Now when the hot water reaches any tap it is very 'milky'. This appears to be

[Plumdim]

Milky hot water. Recently had a Viessmann 100-W combi boiler installed. Now when the hot water reaches any tap it is very 'milky'. This appears to be micro bubbles and clears, upwards, in a few seconds leaving no residue. Though this is a hard water area in 45 years have never had this cloudy water. What is the cause......anyone know?

 

[Gasmk1]

According to Worcester Cloudy Water | Worcester Bosch - https://www.worcester-bosch.co.uk/support/troubleshooting/faqs/all-faqs/why-is-the-hot-water-produced-by-my-combi-boiler-sometimes-cloudy