Three-way connectors can be used in various industries, and can be categorized into several types accordingly:

1. Carbon steel, cast steel, alloy steel, stainless steel, copper, aluminum alloy, plastic, polyvinyl chloride, PPC, and more, categorized by material.

2. Divided by production methods, it can be categorized into top-making, pressing, forging, casting, and so on.

3. Divided by manufacturing standards, it can be categorized into national standards, electrical standards, water standards, American standards, German standards, Japanese standards, Russian standards, and so on.