Polyvinyl chloride (PVC) pipes are a type of plastic piping commonly used for plumbing and drainage systems. PVC pipes are lightweight, durable, and easy to install, making them a popular choice for both residential and commercial applications.PVC pipes come in different sizes and thicknesses, which are denoted by their nominal pipe size (NPS) and schedule number. NPS refers to the inside diameter of the pipe, while the schedule number refers to the pipe’s wall thickness. Common sizes for PVC pipes range from 1/2 inch to 24 inches in diameter.PVC pipes are resistant to corrosion, chemical damage, and UV radiation, making them ideal for use in outdoor applications. They are also relatively inexpensive compared to other types of piping materials.However, PVC pipes are not suitable for hot water applications, as they can soften and deform at high temperatures. Additionally, some PVC pipes may contain harmful additives such as lead or phthalates, which can leach into the water supply over time. It is important to choose PVC pipes that are certified safe for use in potable water systems.