Discuss Viessmann combi starts when cold, mixer, tap is opened in the USA area at PlumbersForums.net
Thank you Shaun for your reply and solution.Needs a non return valve fitting on the cold to the boiler and a shock arrestor
Thank you Shaun for your reply and solution.
Might changing the tap from a mixer to two singles also cure the issue? {they are 45 years old!)
Reply to Viessmann combi starts when cold, mixer, tap is opened in the USA area at PlumbersForums.net
We get it, advertisements are annoying!
Sure, ad-blocking software does a great job at blocking ads, but it also blocks useful features of our website. For the best site experience please disable your AdBlocker.