Me using Nesh. Since 2015. Every morning do the simple flush. Once a month do backwash. Last year wanted to change the membrane, Nesh ppl said if water flow still good, no need to change. So 8 years already.

if your condo all unit within same floor main water supply/meter kept inside PBA/water room

then better check with management see can pasang or not

sometime you pasang big ass water filter ..will kacau other unit
my condo only allow to pasang those "small" punya ; because if not will block/kacau other unit