There is a great number of fittings. They are utilized to alter the size and shape of a section of the plumbing system, as well as to connect pipes to various heating, cooling, measuring, or other devices. These connection elements are presented in various types. The first one is known as barb fittings. Such elements are used to attach bending pipes to their rigid counterparts. The second type is known as elbow fittings. These devices link two straight elements and allow the direction of a pipe to be changed. There's another type known as cap fittings. They close the end of a tube segment to prevent the outflow of a substance. There are nipples and couplings that connect other fittings to each other. Union fittings have a similar function, however, they provide possibilities for easy access and repair. T-sections and Y-sections are needed to unite or divide the flow of liquid in the system.