Hotel hot water, the closer the same floor is to the main pipeline, the worse the water pressure. What is the reason?

"Closer to the main pipeline" should refer to the spatial distance, not the effective length of the pipeline.

That is to say, the closer the space seems, the longer the water supply pipeline with the main pipeline may actually be. It is suggested to find out the direction of the actual water supply pipeline first, and then see where the problem lies, and not just judge by the distance of the external space.

In terms of pipeline water supply, the longer the effective pipeline length from the main pipeline, the smaller the water pressure, which is correct.