First step on a burst pipe

Close the isolating valve clockwise. If you cannot find it, the building valve via the caretaker. No wet hands on the board.

Hours Mon–Sat 08:30–20:00. Not 24/7; flooding jumps the queue. A clamp stops damage; a lasting swap may be a second visit.

A ceiling leak that your valve does not stop is the stack. No break-out until we split it.