buy a blow torch and use solder ring fittings they are easy for the diyer they wont leak . i dont understand why you have to test pipe at 10 bar my combi would blow up before it got to that
Because if the pipework will stand 10bar for 1 hour, it will be VERY unlikely to be a problem at 1 bar. It's easier to test and fix than to cross fingers and lift the floor later.
cosmetic, new piping above the tiles could have ran from the old radiator was to where the new radiator will be, about 300mm of pipe running along the floor would spoil the look of the wifes tiles ...silly really but i can't go back now!
But it is true - this is the reason that Yorkshire manufactures them and people buy them. And if you do the preparation correctly then you don't even need that third hand to hold the solder reel.
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