1.A booster pump is usually installed as close as possible to the water source (water tower). So, the rooftop would be the most ideal place.
2.Choosing the right booster pump can contribute to our quality of life. As people are paying more and more attention to it, the designs of booster pumps have been improving. Perhaps you can advise your neighbor to choose a booster pump from Walrus' TQ_B or HQ_B series to solve the noise problem.