Hi guys, am staying in a highrise with low water pressure issue. It is also observed that a good numbers of owners have installed their individual water pumps to increase pressure into their own units.

Questions:
1. Is it legal?
2. If it is not, appreciate your help to point me to the relevant act (tried looking but have not identified anything I can use as a layman) so I can quote it for discussion with the management office.

Thanks!