The Ontario Building Code | Hose Connections
188.8.131.52. Hose Connections
(2) In addition to the requirements in Sentence (1), if a standpipe system is required, 65 mm diam hose connections shall be installed in each storey in the building if thebuilding,
(a) is more than 25 m high, measured between grade and the ceiling of the top storey, or
(b) has a building area of more than 4 000 m2.