Pride Plumbing came out and provided a cost estimate to 1) cut into and remove a small section of interior tile and concrete flooring; 2) dig down and locate a clogged section of a mop sink's drain line; 3) cut out and replace the clogged section of pipe with new PVC piping and fittings - connecting back onto the remaining drain piping with new Fernco couplings; 4) inspect the condition of the remaining pipe; and 5) after testing for leaks and proper drainage, replace the dirt and concrete we took out.