What type of pipe is NOT typically used for hot water applications?

In the context of hot water applications, ABS (Acrylonitrile Butadiene Styrene) pipe is not typically used due to its material properties. ABS is a type of plastic commonly used for drainage, waste, and vent piping, but it has a lower heat resistance compared to other pipe materials. This means it can warp, deform, or degrade when exposed to the high temperatures associated with hot water.

On the other hand, pipes made from copper, CPVC (Chlorinated Polyvinyl Chloride), and PEX (cross-linked Polyethylene) are all suitable for hot water systems. Copper has excellent heat resistance and is also highly durable. CPVC is specifically formulated to withstand high temperatures, making it a common choice for both hot and cold water applications. PEX is flexible, easy to install, and can handle high temperatures as well. Thus, ABS is the correct choice as the option that is not appropriate for hot water applications.