Mainline to restrooms backed up. Ace Pelizon Plumbing found both bathrooms backed up. Found clean out on floor in women’s restroom. Spoke to Sheila and they went with cable and camera of mainline. Ran cable down and cleared line around 80 feet. Pulled out multiple tampons stuck to cable. Ran camera down approximately 100 feet and found no breaks or offsets to pipe. This is a cast iron line and shows signs of age. No warranty to blockage.