The most common cause of failure of compresion fittings is over tightening during installation. Due to over tightening, the ferrule is not round and cannot be completely sealed. When sealing the joint, a leakage test shall be carried out. If there is a leak at the joint, slowly tighten the nut until the leak disappears. Although very useful in sealing pipes, compresion fittings are not as strong or visual as welded and sweaty connections.
In applications that are prone to over tightening or strict use, such as outdoor faucets, welded connections may be better than compresion fittings. In addition, in areas and applications prone to water pipe chatter, in applications that require occasional disassembly or disassembly for maintenance or instrument replacement, compresion fittings are best used to facilitate reassembly. This does not require much or no tools to complete the assembly. Compresion fittings are easy to install in an emergency and are usually installed as a temporary solution to the problem, which will eventually be solved by welding.
