hi im having a problem.im fitting a new bbathroom and everything is going good except the radiator.the old pipes are 10mm and im trying to change them to 15mm togo on new radiator .ive done 1 side but the other just wont join. ive used a coupier?? but i cant get it to seal.ive used flux and soilder but it still leaks HELP ME!!!!!
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hi im having a problem.im fitting a new bbathroom and everything is going good except the radiator.the old pipes are 10mm and im trying to change them to 15mm togo on new radiator .ive done 1 side but the other just wont join. ive used a coupier?? but i cant get it to seal.ive used flux and soilder but it still leaks HELP ME!!!!! 
