This is a female fitting, which means that it can only be attached to a male type of connection. It can also be used to combine the flow from two inlets to one outlet. They come in many different types, and they are usually differentiated by their function, the type of connection they perform, and the materials that they are made of. The word plumbing comes from the Latin plumbum, which means lead, a word that also was used by the ancient Romans to refer to pipes.
I tried using the hoverClass, and also tried just manually changing the class in over and out events. There are several manufacturers of PEX tubing, and each offers their own complete line of fittings. It is a form of flexible plumbing tubing used for both hot and cold water supply lines. Specific fixtures in the home have their own specific connection type, such as the water supply to a toilet. Unlike other forms of plastic plumbing pipe, PEX fittings form mechanical unions.