A water pipe usually splits for one of five reasons: water froze inside it and expanded, corrosion thinned the pipe wall, household water pressure is too high, repeated water hammer has stressed the line, or the pipe was damaged during a project or by shifting framing. Older pipes are more vulnerable to all of these.
Freezing
Water expands by about nine percent as it freezes. Inside a pipe, that expansion has nowhere to go, so pressure builds until the pipe gives way. The most exposed lines run along outside walls, through garages and crawl spaces, and under sinks on exterior walls. Splits often leak only after the ice melts.
Corrosion
Galvanized steel, common in many older homes, rusts from the inside, and its inner diameter shrinks as it does. Copper can develop pinholes over time. Either way, the wall of the pipe gets thinner until a small weep becomes a split. Rust stains, green crust, or a damp spot along a pipe are warning signs.
Pressure and Hammer
Water pressure much above about 80 psi puts constant strain on pipes, fittings, and appliance hoses. Water hammer, the loud knock when a valve closes fast, sends a shock wave through the line each time. A plumber can measure your pressure and suggest a pressure reducing valve or hammer arrestors if needed.
Physical Damage
A nail or screw driven through drywall or flooring can pierce a pipe and leak slowly for weeks. Settling framing can bend and stress lines over time.
Lowering the risk mostly comes down to keeping pipes warm, insulating exposed runs, managing pressure, and fixing small leaks quickly.
If you have noticed weak spots, swapping out the weakened run ahead of time can prevent a flood. An evaluation of how your piping is aging is a good next step for older homes. Call JPR Plumbing at (833) 603-1840.