Im staying in old condo with super week water pressure. Did check with plumper guy and they confirm the piping from water tank to my house pipe having issue (inside all corroded, even finger also unable to put in). Check with condo management and get approval to lay 1 pipe from tank direct to my water meter (bypass the main piping)
Water pressure getting bigger but still weak. I already have water pump install when bought this condo (even with water pump, water pressure still weak when connect to main pipe).
My house piping connection - >
Tank -> water meter -> water pump / bypass water pump ->water filter -> to my house piping.

Water pressure? When u open water pump and show, u will feel the pain.

Disadvantages - Sometime the stopper at the water pump not work properly, it will keep on pump (even no one using the water). Since pump motor keep on running (it will heat the water temperature and will melt the piping)