After thirty years of usage, the plumbing in my house is starting to fail progressively. The water pipes in my house is made of copper, one of which is suffering from pitting, which results in a pin-hole leakage. I tried to repair with plumber's putty, but that did not work as the water cannot be drained out completely even when the mains is shut. I have also tried taping and clamping, but it wouldn't work either.
As a portion of the pipes running through my house is buried underground, there could be leakage undetected elsewhere. My intention is to replace the entire network of water pipes with one that is exposed and easier to inspect and maintain. I am given two options, copper or stainless steel. The stainless steel option is currently 20% cheaper, but I am not sure whether this is the better option in the long run.
Is stainless steel piping more durable than copper?