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