A universal nipple connector is a multi-functional pipe fitting centered around a "nipple-style" interface. Its core function is to flexibly connect small-diameter pipelines or device ports of different specifications and types, solving connectivity challenges between flexible hoses (such as PE or silicone tubing) and threaded or quick-connect fittings—especially in low-pressure applications. Featuring interchangeable or adaptable components, it emphasizes versatility and ease of use.