How many types of gaskets does a grooved pipe coupling have?

A grooved pipe coupling typically utilizes one type of gasket designed specifically for sealing the joint between the two grooved pipes. The purpose of the gasket is to create a watertight seal that prevents leaks in the piping system, particularly in applications that involve fluids under pressure.

While there may be variations in material or profile among gaskets used in different systems, the standard implementation within grooved coupling systems is to use a single type of elastomeric or rubber gasket that fits the coupling's design. This simplifies installation, maintenance, and replacement processes, thus ensuring optimal performance and reliability of the pipe system.

Some other choices might imply the existence of multiple gasket types, which is generally not the case for standard grooved couplings. Having three or more types does not apply to traditional grooved pipe applications, as they are engineered to function effectively with a specific gasket design that meets the necessary sealing requirements.