What piping is commonly used in a hydronic heating system?

In a hydronic heating system, hydronic piping is specifically designed to transport heated water from the boiler to various heating elements, such as radiators or underfloor heating systems, and then return the cooler water back to the boiler for reheating. The materials used in hydronic piping, often copper or PEX, are selected for their ability to handle high temperatures and pressures, providing efficient thermal conductivity and durability.

This type of piping is crucial in ensuring that the heating system operates effectively, allowing for consistent and uniform heat distribution throughout the space. Each of the other options listed serves distinct purposes in different systems, making them unsuitable for use in a hydronic heating context.