Repiping typically involves using materials like copper, PEX (cross-linked polyethylene), and CPVC (chlorinated polyvinyl chloride). Copper pipes are durable and have a long lifespan but can be more expensive. PEX pipes are flexible, resistant to scale and chlorine, and easier to install, making them a popular choice. CPVC pipes are also a cost-effective option, resistant to corrosion and chemical damage. The choice of pipe material depends on factors such as budget, local building codes, and specific needs of the home.