I opened up a wall as part of a project and discovered some obviously newer pieces of copper pipe on one of the water supply lines. The drywall shows evidence of water stains as does the drywall and doors on the floor below. There must have been a leak in the pipe that was subsequently repaired (before I bought the house).
Looking at the repaired water line, I don't see any solder - it looks as if the new pieces are just crimped on. Is this an acceptable way of repairing a leak in copper, or should I be worried about it leaking in the future?