My second was a replacement from antec, so free. After that i went air cooled for cpu, and modded the aio onto one of my 970s, worked great, while it worked.
Ill send it in for another replacement
A typical Asetek pump from a bg brand cooler like NZXT, or Corsair or EVGA, is specced for about 5-6 years, assuming the user keeps the liquid temperature under boiling point, warranty will usually cover it if it does get defective within that.