I think they are working on the technology for lining the pipes in private systems, the problem being that those pipes are so small, how to get the liner through it before "inflating"?
When they are working with pipes in the street, they are typically 8" or more in diameter - for relining, usually bigger than 16" I think. It is cost effective to buy the expensive product and not have to remove the pavement, remove the gravel, dig down to the pipe, remove the old pipe, put in new pipe, fill the hole, and build a new roadway on top. Home services are smaller and cheaper projects - just dig up, replace and refill the hole. Level it off and some seed and you are good to go.
When they are working with pipes in the street, they are typically 8" or more in diameter - for relining, usually bigger than 16" I think. It is cost effective to buy the expensive product and not have to remove the pavement, remove the gravel, dig down to the pipe, remove the old pipe, put in new pipe, fill the hole, and build a new roadway on top. Home services are smaller and cheaper projects - just dig up, replace and refill the hole. Level it off and some seed and you are good to go.