I need to fit a new radiator to an existing system which should be straightforward. However I have 3 questions.
1. The flow is 22mm and the return 15mm at the point most convenient to tee into - about 4 meters from the combi boiler. Can I come off both with 15mm pipe?
2. When complete do I need to flush the complete system or would a single radiator not create sufficient gunge to make that necessary.
3. Not really a question. Any advice about adding the inhibitor please.
Have you had a look at the DIY Projects section at all as there are numerous projects relating to Central Heating that may provide you with the information you require: https://www.diydoctor.org.uk/projects.htm
DIY how to tutorial projects and guides - Did you know we have a DIY Projects section? Well, if no, then we certainly do! Within this area of our site have literally hundreds of how-to guides and tutorials that cover a huge range of home improvement tasks. Each page also comes with pictures and a video to make completing those jobs even easier!