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Any advice please. I am about to run a 22mm copper pipe up through a flat roofed garage into the loft of a house. What is the best way to keep the roof weatherproof / water tight at the point of exit of the pipe. Any help appreciated.

Advice Please. Went to an Ariston Micro Combi problem which was noisey boiler when hot water demand was on and only lukewarm water. In my inexperience I went for faulty heat exchanger which cured the noise but not the fact that only lukewarm water is still produced. Heat sensors have also...

sambotc and JohnD Many thanks to you both, now makes perfect sense

Thanks all. I have a megaflow on an S Plan hence 2 x 2 port valves. One more question though, what or where is HW return. If HW stands for hot water I have hot water leaving the cylinder to the taps - what return is there? Think I'll just go for branching in close to the boiler on the return

Thanks ChrisR, so just to confirm it's a system boiler so my return goes back to the boiler, I can't just feed into my main return. It has to be a separate circuit altogether

I want to have my towel rads coming on in the summer. I know I can connect them to the flow pipe before the diverter valve so they come on whenever the boiler fires up. But should they be connected before or after the pump and does it matter where the return is connected