Alan wrote:
Hi,
Cleaned the parts to be soldered? Shiny clean. Applied flux?
Heating the parts to be soldered? Then apply solder which will
flow by capillary action.

No, not shiny clean, the surface should be roughened a bit like with
sandpaper.

BS, just roughening it up a bit is a recipe for failure. A pipe joint
being soldered does need to be shiny clean. That's what they make
those neat little wire brushes for or you can use emery cloth.


Then wipe on waterbase flux on all contact areas to be
joined. The brass fittings will require a LOT more heat than copper to
get what you want done. It's not welding, but it is significantly
hotter than simple copper work. Remarkably, the flux will suddenly be
drawn in the void between the parts, and you'll know it worked. Be
careful not to move the parts when hot, or the solder joint can be
broken. Rather, dip in a bucket of water or hose the parts off to
quickly cool the finished joint.

Don;t know anyone that plunges soldered joints into cold water either.
If that were the case, you'd have a hell of a mess trying to plumb a
house!