K Cross Union is a high-temperature plastic pressure piping system introduced for potable plumbing. It has also been used extensively in fire sprinkler systems. This material is also used for many industrial and process piping applications. The material used is significantly more flexible and can withstand higher temperatures. Our K Cross Union come in a variety of shapes and sizes, and is designed to handle all kinds of jobs, from residential plumbing applications such as hooking up washing machines and dryers, to swimming pools and outdoor plumbing applications.