What material is used for pipes in a solar water heater?

Pipes in a solar water heater are typically made from materials that can withstand high temperatures and corrosion, such as copper, stainless steel, or high-density polyethylene (HDPE). Copper is favored for its Excellent thermal conductivity, while stainless steel offers durability and resistance to rust. HDPE is often used for its flexibility and resistance to UV radiation, making it suitable for outdoor applications. Each material has its advantages depending on the specific requirements of the solar water heating system.