Mechanical room
A heater leak belongs to the mechanical room, not a hallway guess.
Domestic tanks and tankless units sit in suites or in shared rooms. A leak there can look like a riser problem, a slab leak, or a flood from nowhere if nobody opens the right door.
Do not enter a room that is unsafe.
Standing water, gas odour, or a hot tank jacket is a reason to stay out and call. The corporation’s contractor or ProShield can take the next step once access is granted.
Note whether the leak is at the tank or the piping.
A tank can weep at fittings, the drain, or a failed liner. Nearby copper can pit independently. Mixing those two stories wastes repair money.
Shared heaters need a building record.
If one heater serves several suites, the board needs a finding that says so. Occupants should not be left to argue over a unit they cannot access.
Questions people ask
Can a tank leak look like a pinhole in the hallway?
Yes. Water from a mechanical room can travel along a slab or a sleeve and appear far from the heater.
Should I shut the heater off myself?
Only if you are authorized and the control is dry and labelled. Otherwise call and get the building contact.