The (in)famous “Who’s responsible …” document says that the main stopcock to a unit is OC responsibility but leaking pipes within the unit are individual lot owners’ responsibility. Pick the bones out of that!
Paradiso’s SM seems to have taken a sensible view on this for obvious reasons. If the stopcock is the last chance to turn off water coming into the apartment before it hits your system, then its Common Property. If, however, you have a secondary turn-off tap under the kitchen sink (for, say, fitting and removing dishwashers etc) it will be lot owners’ responsibility.
You can access the “Who’s responsible for what” document HERE but be aware it is a guide and not the law. You can amend and adopt it as a by-law for your building but even then, it’s not set in concrete as this paper by our legal sponsor Makinson D’apice suggests. Have a look HERE and whiz down to page 10 – it makes very interesting reading.
That said, the “Who’s responsible” document will be the first thing strata managers and CTTT adjudiacators look at when there’s a dispute so it does have considerable influence.