This pump absolutely solves the lit fire properly of shower owing to the lower pressure and unreliable pressure.
When the tap water is of low pressure, the pump can boost pressure.
It can also boost pressure for solar water heaters, boost pressure and circulate water for industrial equipments, and increase oxygen for rearing ponds and fish tanks.
The best feature is that it can suck tap water from one or two floor below directly, so it compeletely solves the problem that the higher floors do not have water while the lower floors have.