Where is the primary pressure relief valve of BMW 320i in 2005?

In 2005, the main relief valve of BMW 320i was at the end of the pipeline. According to relevant information, the installation position of automobile pressure reducing valve is at the end of pipeline, so is BMW 320 in 2005. Because the flow rate of the pipeline is controlled by the end, water hammer is usually generated at the end of the pipeline. Setting a safety relief valve near the end of the branch pipe can quickly open when the pressure reaches the set value, safely release the flow and reduce the pressure fluctuation in the pipeline.