| in passing ignore anything people tell you about pickling copper using anything but sulphuric. Copper has to be as clean as possible to get a decent joint. I use regent grade sulphuric diluted to 20%. What ever you do dont put a hot boiler in the pickle let it cool firts. the only thing is dont pickle the entire boiler. just around the joints you are about to make. It helps contain the silver solder as it wont flow on to dirty copper.
Emery cloth is a big no no for cleaning after pickling it has grease in it. I use 0000 wore wooll thats been washed in cellulose thinners.
As the noiler goes together keep fluxing as many joints as you think are going to get too hot just incase you get re melt.
Avoid rodding the solder in, rather cut short bits and place it around the joint your making. |