Water pipes usually burst because of freezing temperatures, corrosion that weakens the pipe wall, water pressure that is too high, worn joints and fittings, or physical damage from things like nails or shifting structures. Often, two of these work together, such as an older pipe that finally gives way during a cold snap.
Freezing in Cold Weather
When water freezes, it expands. That pressure builds between the ice and a closed faucet until the pipe splits. Pipes in unheated spaces are most at risk, including those along exterior walls, in garages, crawl spaces, and under sinks on outside walls. The split often leaks only after the ice thaws.
Corrosion and Age
Older galvanized steel pipes can rust from the inside out. Copper can develop tiny pinholes over many years, especially if the water chemistry is harsh. Corroded pipes get thinner and weaker until a small leak turns into a sudden break.
High Water Pressure
Most homes do well with water pressure between about 40 and 80 psi. Higher pressure strains pipes, joints, and appliance hoses every time water flows. Signs include banging pipes, leaking faucets, and toilets that run often. A plumber can test the pressure with a simple gauge.
Fittings and Physical Damage
Joints are weak points. A fitting that was not installed well can loosen over time. Pipes can also be punctured during home projects, such as hanging shelves or replacing flooring, and the leak may stay hidden for weeks.
Ways to lower the risk include keeping the heat on during cold weather, insulating exposed pipes, and fixing small leaks quickly. If you have noticed rust, pinhole leaks, or banging, replacing the worn-out stretch of pipe can prevent a bigger break. Homes with older plumbing benefit from an occasional review of pipes, valves, and pressure. Call JPR Plumbing at (833) 603-1840.