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I need to top up the pressure on my viessmann vitodens 100-w but have never done it before. Looking in the manual it seems I need to get a filling loop. I can see that I need to attach one end to the valve on the far right but where can I attach the other end to?

Hi everyone, Hoping someone can shed some light on a heating issue I've been having. Four years ago, I had a new system installed, including boiler, unvented cylinder, pump, valves, and separate upstairs/downstairs zones controlled by Nest thermostats. Everything worked fine until recently...

Just looking for some advice/opinions.. I moved into a house earlier this year with an old gravity fed system. We have a tank in the loft, a cylinder/immersion heater in landing cupboard and a system boiler on its a last legs downstairs. We have 2 bathrooms, one shower has a very noisy pump and...