Your main sewer line is the drain pipe that all of your drains connect to. It then leads out to the city or county sewer line. At some point, this drain pipe will begin to erode and begin to leak. At this time, you will need to replace it. This drain line is constructed in sections, so if there is only one section that needs replacing, this is all that will need to be done. Of course, because the drain line is old, you may end up having to replace another section soon after replacing the first section. There is another method that can solve this problem, and it is cheaper.
Trenchless sewer line replacement
This alternative to replacing your main drain line is cheaper and also more effective. One of the reasons for the lower cost is that there is less labor involved in digging. This is why it is referred to as trenchless. With a traditional main line replacement, a trench must be dug to access the entire sewer line, so it can be removed and replaced. The trenchless method takes a single hole to access a small portion of a single section of the drain line. In some cases, a plumber may be able to remove your toilet and use this access point, so there is no digging at all.
Your property is not torn up
It is likely that not every portion of the sewer line is covered by grass or dirt. There are likely sections that are covered by concrete such as a sidewalk or patio area. In this case, the concrete must be dug up. Everything on top of a sewer line must be dug up to replace your pipe with a new pipe. This can cost additional money on top of the labor for digging the necessary trenches. There is also the increased chance of damage to your property when you are removing concrete or asphalt. None of this is necessary with a trenchless sewer line replacement.
The way it works
Instead of doing any digging, a plumber will send a long cable through the entire length of the sewer line. This cable will have a special attachment that functions to break the inside of the pipe as the cable is pulled back to the starting point. Next, a nozzle that sprays an epoxy is pulled through the pipe, and every square inch of the inside of the drain line is coated. After the epoxy sets, the entire drain line will be sealed, and there will be no more leaks. You will have a like new drain pipe without any digging.
If you are interested in trenchless water line installation, you need to call a plumber that offers this service. Not all plumbers do. You will need to have a company send someone out to your home, so they can look at the specifics of your piping system and the layout of the sewer line. They will then be able to provide you with a quote for the work that will need to be done.