Compression fittings create removable plumbing connections on standard rigid and flexible copper pipe and tubing. There are also compression union fittings that join two pipes in a straight line. Compression fittings offer an easy-to-install alternative to traditional soldered plumbing connections.Click to see full answer. In respect to this, are copper compression fittings reliable?Although compression fittings are generally considered more reliable than threaded fittings, there are some potential problems. In general, compression fittings are not as resistant to vibration as soldered or welded fittings. Repeated bending may cause the ferrule to lose its grip on the tube.Beside above, what methods can be used to join soft copper? Soldering and brazing, used in combination with capillary fittings, is the most common method of joining hard copper. Welding is also used, though it is far less common. “Soft” copper can also be joined by soldering or brazing, and is also connected using flare-type or compression fittings. Also Know, can you use SharkBite fittings on soft copper? Can SharkBite fittings be used with soft copper or rolled copper? No, SharkBite fittings can only be used with hard drawn copper types K, L, and M.Why do my compression fittings leak?Tighten compression fittings firmly with two wrenches to crimp the ferrule onto the pipe (Photo 3). Also make sure the pipe or tube goes straight into the fitting. Misalignment will cause a leak. If the fitting leaks after you turn on the water, try tightening the nut an additional one-quarter turn.