Copper plumbing pipes typically last 40 to 70 years. PVC and CPVC last 25 to 40 years. Polybutylene pipes, common in homes built between 1978 and 1995, are highly prone to failure and should be replaced. Galvanized steel pipes last 20 to 50 years but are prone to corrosion and mineral buildup that restricts water flow.
If your home has original plumbing that is approaching or past these lifespans, repiping may be necessary to prevent leaks, water damage, and costly emergency repairs.
Expected Lifespan of Common Plumbing Materials
Copper is the gold standard for residential plumbing and can last 40 to 70 years. PVC and CPVC are affordable and corrosion-resistant but become brittle with age. Polybutylene (gray plastic pipe) was used in millions of homes before class-action lawsuits revealed its tendency to fail without warning. If your home has polybutylene, replacement is strongly recommended. Galvanized steel pipes rust from the inside out, reducing water pressure and eventually leaking.
Signs Your Plumbing Needs Replacing
Low water pressure throughout the house often indicates mineral buildup in old galvanized pipes. Discolored water, especially brown or yellow, suggests rust inside steel pipes. Frequent leaks under sinks or in walls point to failing sections. Water stains on ceilings or walls from pipe leaks inside walls mean the damage is already happening. If your water bill spikes without explanation, you may have a hidden leak.
Cost of Repiping a Home
Repiping a typical San Antonio home costs $4,000 to $15,000 depending on the size of the house, number of bathrooms, and material chosen. PEX piping has become the most common replacement material because it is flexible, resistant to freezing, and more affordable than copper. A full repipe is a major project, but partial repiping can address specific problem areas at a lower cost.
