How long does copper piping for water last?

Depends on the grade of copper dwv / m / l / k are in order from thinnest wall to thickest. If the water is public water system type m usually lasts 50 -70 years. If well water is used a lot determines its lifespan..... ph, iron, calcium, turbidity or abrasives. Every house in most cases has its own determining factors which are variable.

Registerd master plumber / gasfitter MD. & VA.