Always be aware of the location of the sprinkler heads/sprinkler system in your property.
Sprinkler heads are installed on ceilings or walls in condo and apartment buildings.
Some sprinkler heads may be located inside closets.
A slight impact to a sprinkler head may cause a flood.
Never hang items from sprinkler heads, such as, but not limited to: clothes hangers, clothing, plants, decorative items.

A typical ceiling sprinkler head (pendent type) looks like this:
Note: a sprinkler guard is installed on this sprinkler head

A typical wall sprinkler head (sidewall type) looks like this:
Note: a sprinkler guard is installed on this sprinkler head

Note: Not all sprinkler heads have guards installed. Sprinklers do come in different colours and types.