There are also compression union fittings that join two pipes in a straight line. Compression fittings create removable plumbing connections on standard rigid and flexible copper pipe and tubing. Fix-it man Mark Kimball shows how it s done. Compression Fittings on Copper Tubing: Compression Fittings are also popular with connecting copper tubing, however they require special compression tools and make a permanent connection that requires the replacement of the pipe if there is ever a need to disconnect (in instances of a leak).
Larsen Supply Company presents a 2-minute plumbing video on how to install a compression fitting on copper or plastic tubing. They are most commonly found on water shutoff valves, or stop valves, the type used on faucet and toilet water supply pipes. These fittings provide a means for adapting a solder connection to a threaded connection. The lead-free wrought copper solder pressure male adapter The lead-free wrought copper solder pressure male adapter is used in residential and commercial systems such as potable water air conditioning and refrigeration.
Copper pipe, however, is not particularly flexible, which can make it a little unwieldy to work with.