I have a home built in 1950 with a cement sewer line. I have had to have the line cleared twice in the last two years. The last time they sent a camera down the line and the line seems root free with no obvious broken sections. The line had a few slightly bumpy sections but I suspect not too bad considering the age. I would like to install a cleanout so I don't have to pull the toilet next time it backs up. I dug the hole and found the pipe to be what I think is 5" cement type. I need to know if there are rubber sleeves for this size of pipe so I can add the "Y" ABS fittings also what is the best way to cut the cement so as to get a clean edge?
Concrete chainsaws can be rented. They would do all the cutting from above and simplify the excavation. Industrial sized hydraulic ones cut open doorways in poured concrete walls.
Another option would be a flexible saddle tap..,which installs by drilling the concrete line with the proper coring bit. Fernco makes a wide line of drain fittings