In water and wastewater piping systems, pipe couplings are used to connect two or more sections of pipe with the aim of maintaining continuity between them. They can be used to join pipes of different or equal sizes, as well as connect more than just two pipes if they are cross or T-shaped.
A hex nipple gets it's name from the hexagon shaped middle section. The hexagon shape allows for a wrench to grasp it securely. If you come across a hex nipple with two different sizes on each end, it is referred to as a reducer or unequal nipple.
The PP Hex Nipple is extensively used in irrigation fittings as the reducing joint for connecting two female threads. Manufactured from excellent quality of polypropylene, the entire range of hexagonal nipple is suitable for use above or below ground. A hex nipple is a fitting that is constructed from a piece of pipe that has a hexagonal section in the middle used for a pipe wrench to fit onto and used to tighten or loosen.