Brass ferrule fittings are a type of compression fitting used to join two or more pipes or tubes together. They consist of a brass ferrule, which is a cylindrical ring with a tapered inner surface, and a compression nut, which is threaded and tightened onto the ferrule to create a tight seal. The ferrule is placed over the end of the pipe or tube and is compressed when the nut is tightened, creating a tight seal between the fitting and the pipe or tube. Brass ferrule fittings are commonly used in plumbing and gas fitting applications and are known for their ease of installation, reliability, and durability. They are made of high-quality brass, which is resistant to corrosion and can withstand high pressure and temperatures. Brass ferrule fittings are available in a variety of sizes and configurations to suit different applications, and they are widely used in residential, commercial, and industrial applications around the world.