10/29/2026
Seen this post making the rounds. The old-vs-new thickness thing is a little misleading — copper wall thickness goes by type (K is thickest, then L, then M) and the specs haven't changed over the years. That photo is likely two different types side by side.
Copper is great pipe for water inside a house. Where it struggles is underground — in the wrong soil it corrodes from the outside in and pits through with pinhole leaks. We dig up failed copper services all the time.
That's why new water services go in plastic now — Wirsbo/PEX or poly. Nothing there to corrode.
Right material in the right place. ⚡️
