(1) Considerations. To make a leakproof joint all tarnish must be
completely removed from the end of the tubing and the inside of the fitting so that
the solder will tin all surfaces evenly. The next important step is to get a
temperature which allows the solder to flow evenly into and completely fill the
joint. If the temperature is too high, the solder will spurt out of the fitting.
(a) Inspect the end of the tubing to make sure it is round and free of
(b) Clean and brighten the end of the tubing and inside of the fitting
with fine steel wool or emery cloth until both are highly polished. Do not use a
file as it will scratch the surface.