Copper pipe is a durable, corrosion-resistant, and high-conductivity piping material primarily used for potable water, HVAC systems, and gas lines. Made from 99.9% pure copper, it is valued for its longevity, antimicrobial properties, and ability to withstand high temperatures and pressures. Common types include K (thick-walled), L (medium), and M (thin-walled), available in rigid or soft tempers.