Compression fittings are among the most common connection style fittings which are used in drip irrigation systems for connecting sections of solid drip tubing or dripper line. Compression fittings come with an internal compression ring that can squeeze the outside diameter of the tubing as it is inserted inside the fitting. The sharp edge of the ring can get into the soft tubing for preventing tubing from blowing off the fitting and also creates a watertight seal. Compression fittings are considered as a permanent connection and are not recommended for reuse. Once the tubing has been inserted into the fitting it becomes very hard for removing the tubing. The compression fittings can be found for fitting a range of tubing and all of them are color-coded for indicating the appropriate tubing outside the diameter they fit in. The range of compression fittings mainly includes tees, couplings, elbows, spigot adapters, male thread adapters, and plugs.