What should be ensured about the pressure relief valve's placement in a hydronic system?

The correct focus for the placement of a pressure relief valve in a hydronic system is that it should be located on the low-pressure side. This positioning is critical for the safety and proper functioning of the system.

When a pressure relief valve is installed on the low-pressure side, it ensures that any excess pressure occurring due to thermal expansion or other operational factors can be safely released. This prevents potential damage to the system, including the components and piping, and mitigates the risk of dangerous pressure build-up that could lead to system failure or catastrophic events.

By maintaining the valve on the low-pressure side, we help ensure that the valve opens at predetermined pressure limits, effectively protecting the hydronic system and maintaining the integrity of the entire heating or cooling setup. This consideration is vital in adhering to safety codes and mechanical best practices.

The other choices relate to different aspects of system design and operational safety that, while important in their own right, do not specifically address the key safety aspect of the relief valve’s function and placement.