Where should combination temperature and pressure relief valves be installed?

Combination temperature and pressure relief valves should be installed according to the listing requirements and manufacturer’s instructions. This ensures that the valve functions properly, maintaining safety and compliance with relevant plumbing codes.

Manufacturers provide specific guidelines regarding the installation location, orientation, and any additional requirements needed to effectively manage pressure and temperature within a system. Adhering to these instructions not only maximizes the equipment's performance but also helps in preventing potential hazards such as overheating or excessive pressure buildup, which could lead to system failure or dangerous situations.

The other options, while relevant to various plumbing applications, either do not address the specific guidelines required for installation of these valves or suggest locations that may not optimize their performance or safety.