If your unit on top of break tank , you may have chances expose to noise disturbance from pump also . If have other option try no select the unit same row with break tank .

The noise will transfer the noise through the structure wall as all unit is connected . For my experiences the noise can travel above 6 unit and below 6 unit from break tank room if the pump room does not have proper acoustic room Treatment , proper vibration isolation on equipment and inadequate floor thickness to absorb the vibration .

Of course , This is depend your luck if your building have designed by experiences consultant or architect with this area knowledge .

I’ve seen more negative than positive comments about units below or near water tank in multiple threads by now.

Does it mean people staying in those units in so many condos in KL have been bearing with these noise and vibration everyday? Just seem odd to me.

If this is the case, owners would have complained and authority should require an empty unit below break tank in all new condo projects?