Refrigerant needs stronger and more leak resistant joint. Compression
fittings and soft solder just don't give the reliability that is needed
to hold a seal for 15 to 20 years.

Capt.Doug wrote:

"Bruce L. Bergman" wrote in message The option nobody else has
mentioned is silver brazing, normally
used on air conditioning refrigerant lines.


What is different about refrigerant lines that requires the silver?

D.