Commercial plumbing repair. Frozen water line to the cold side of the lav burst through the wall. I had to remove the entire vanity top and backsplash, disconnect all plumbing to the sink, and pull out. I then had to bust out the block wall 6’ up from the floor to find the burst line. I cut out the bad section of pipe and replaced 6” sections with 2 propress couplings. I had to remove the mirror from the wall to access the copper water line for repair. After the repairs, I tested both hot and cold lines, and they held pressure. I then reinstalled the vanity top and backsplash, connected all plumbing, and tested. I then siliconed a piece of Vat wall covering over the hole I made until a new mirror is installed. Everything is cleaned up, tested, and working as it should.