Plastic compression fittings are plumbing devices used to connect two plastic pipes or tubes in a sealed manner. They are often made from materials such as PVC, polypropylene or nylon. These fittings are popular in home plumbing applications because they are lightweight, economical, and easy to install. They are also chemically resistant and do not rust, making them ideal for water treatment and irrigation systems. Plastic compression fittings are available in a variety of sizes and shapes to meet different installation needs. However, it is important to note that plastic compression fittings are not as strong as brass or stainless steel fittings and are not suitable for industrial or high-pressure applications.