PP (Polypropylene) compression fittings provide a remarkably simple, fast, and reliable method for joining polyethylene (PE) and other plastic pipes without requiring special tools or heat. These durable fittings are designed for cold water systems and are ideal for irrigation, agriculture, and general plumbing applications. The fitting creates a secure, watertight seal through a mechanical compression mechanism: a threaded nut is tightened by hand, which forces a clinch ring to grip the pipe and compresses a rubber O-ring against it. This simple yet effective design allows for quick installation and disassembly in the field, making it a go-to choice for repairs and new projects where ease of use and chemical resistance are essential.