It depends on the specific job and situation. Compression fittings can be a quick and easy solution for some plumbing repairs, but they may not be the best option for all situations. Professional plumbers will assess each job individually and determine the best course of action based on their expertise and experience.
Compression fittings are not recommended for use with gas lines or in situations where the fitting will be subject to extreme temperatures or pressure. They are also not recommended for use with soft tubing materials, such as PVC or polyethylene, as these materials may not be able to withstand the compression force of the fitting. In these situations, it is best to use alternative fittings, such as soldered or threaded fittings.
Yes, compression fittings can be used on plastic pipes, but it is important to make sure that the fitting is compatible with the type of plastic pipe you are using. Some compression fittings are designed specifically for use with certain types of plastic pipes, so be sure to check the manufacturer's instructions before installing.