A burst or split supply line is the kind of water damage that gets bad fast — a failed line can put out gallons a minute behind a wall, under a sink, or in a wall shared with the laundry. In Tucson the usual culprits are aging pipe, water-pressure spikes, corroded fittings, and the occasional hard winter freeze on an exposed or poorly insulated line.

What makes pipes burst here

• Age & corrosion. Older galvanized and thin copper lines corrode and finally split.
• Pressure spikes. A failing pressure regulator lets city pressure surge and stress fittings.
• Winter freezes. Tucson freezes are rare but real — an unprotected line on a north wall, in an unheated garage, or running to an outdoor feature can freeze and split. (See frozen pipe damage.)
• Bad fittings / DIY repairs. A fitting that was never quite right finally lets go.

Fast extraction is everything

With a burst pipe, the volume of water is the problem. The faster a crew extracts standing water and starts structural drying, the more flooring, drywall, and cabinetry survive. Crews pull water, open and dry wall cavities where the line failed, and meter daily until materials are dry — then repair. Because burst-pipe water is usually clean (Category 1) at first, quick response often means less material has to be removed.

Other Tucson water-damage causes