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Hi Rebecca, You have the same problem as me with HG pipework! Mine was installed somewhere around 1980 I think. The whole house is plumbed with it. So far I have rebuilt the kitchen, needing connection to both mains pressure cold supply and the hot water tap at 15mm and both supply and...

Thanks for the compliment Tony. Amazing how a cold house and a cold wife accelerates the learning process! I have a long technical background, so understanding how it works and why is not too difficult - I have more trouble with the detail and knowing the best way to fix it. My boiler is an...

Many thanks D_Hailsham. I have experimented today following advice on procedure, but with no thermometer to hand I have had to use the hand on the pipe test and guess! Before I started playing with it all the radiators had both valves fully open (as left by the previous owners of the...

Thanks for a prompt comment from D_Hailsham. Total load on the 15mm connection is about 3kW. I have an uncomfortable feeling you are correct about the pipe size. I had misgivings about it before I started, but to go back to the last 22mm pipe and extend from there was a major undertaking...

I have just added a radiator to an existing system to heat an extension. I teed off the 15mm supply and return pipes to an existing radiator (furthest from the boiler) - new pipework approximately 4m from the tee. I now find I can get sensible heat out of either the new rad or the old one...