What type of piping is allowed for use with hot water heaters or boilers?

The use of CPVC (Chlorinated Polyvinyl Chloride) or PEX (cross-linked Polyethylene) piping is appropriate for hot water heaters or boilers due to their ability to withstand high temperatures and pressures that are typically associated with these applications. Both CPVC and PEX are specifically rated for high-temperature applications, making them suitable materials for conveying hot water.

CPVC is particularly resilient in high-temperature environments and is often preferred for its resistance to corrosion, while PEX is recognized for its flexibility and easier installation, especially in retrofitting projects. Moreover, both materials comply with plumbing codes that govern the installation of hot water systems, ensuring safety and reliability.

Other types of piping, such as PVC, are often not recommended for hot water applications due to their lower temperature tolerance, which can lead to system failures or safety hazards. Metal piping may be permissible in some cases, but it can be more prone to corrosion and installation complications compared to CPVC or PEX. The chosen response reflects code compliance and best practices for plumbing installations associated with hot water systems.