The Tigris K1 patented design is engineered to optimize the benefits of a composite metal-plastic press-fit system for sanitary, potable water, and heating applications, including re-circulating systems. It comes with a 25-year system guarantee and a proven press-fit technique, eliminating the need for soldering, welding, or thread-cutting. The unique Wavin hexagonal head shape ensures low insertion forces, and the heat-free jointing process removes the need for costly Hot Works insurance permits. This system offers a quick, simple, and safe jointing method, leading to installed cost savings compared to traditional systems. The metal layer in the pipe can be detected in walls or floors using a detecting device. It exhibits high resistance to scale build-up and stress-cracking, along with high pressure and temperature resistance. The thermal expansion is comparable to copper, and it features a defined leak function to reveal unpressed fittings. Wavin Tigris K1 is a press-fit plumbing system designed for potable water, sanitary, and heating uses. The system consists of multilayer composite pipe and premium polyphenylsulphone (PPSU) fittings with a fixed stainless steel sleeve. Fittings are pressed into the pipe using battery or mains powered press-fit equipment, a process significantly faster than traditional soldering methods.