A grooved nipple is a short pipe fitting used in grooved piping systems to connect pipes, valves, or other fittings. Instead of threaded ends, it has circumferential grooves at one or both ends, which allow it to be joined using a grooved coupling and gasket system. The main purpose of a grooved nipple is to provide a quick, strong, and leak-resistant connection in piping networks.

Grooved nipples are commonly made from carbon steel or stainless steel, and they may be coated or galvanized for better corrosion resistance. During installation, a rubber gasket is placed between the pipe ends, and a mechanical coupling is tightened over the grooves, creating a secure seal without welding or threading.

They are widely used in fire protection systems, HVAC systems, water supply networks, industrial pipelines, and large commercial buildings. The main advantages of grooved nipples are fast installation, easy maintenance, flexibility, and reliable sealing under pressure, making them very popular in modern piping systems.

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