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KKFlorida
Sub slab sewer pipe repair in Central FL

My house is a single story concrete block on slab built in the early fities. I am interested in new techniques to repair sub slab cast iron pipes that are corroded and have root intrusion. I have seen coating products and resleeving repairs. I am hoping to avoid sawing into the slab to replace with PVC. What are your thoughts?
Thank you.
KKFlorida

Tom
Re: Sub slab sewer pipe repair in Central FL

This technology has now been around for over 10 years so is well proven. It is even used for municipal sewer and water pipes because it is much cheaper and more efficient to use this technology rather then dig it all up and replace it. There are several different processes used but one of the most common one is to dig a pit at either or both ends, grind out the old pipe, blow a new liner through the pipe and then heat it to secure it to the old pipe. You may have to hunt around the area to find a contractor that has the equipment and experience to do the job.

johnjh2o
Re: Sub slab sewer pipe repair in Central FL
CaptTCB wrote:

This technology has now been around for over 10 years so is well proven. It is even used for municipal sewer and water pipes because it is much cheaper and more efficient to use this technology rather then dig it all up and replace it. There are several different processes used but one of the most common one is to dig a pit at either or both ends, grind out the old pipe, blow a new liner through the pipe and then heat it to secure it to the old pipe. You may have to hunt around the area to find a contractor that has the equipment and experience to do the job.

Big question. What do you do when there are branches off the main line? Won't the liner seal them off?

John

Tom
Re: Sub slab sewer pipe repair in Central FL

Yes. The contractor would have to dig up those areas. There would be an inspection by camera first to determine where those areas are and the hole would be relatively small as the camera measures the distance as it procedes down the sewer.

Hank Bauer
Re: Sub slab sewer pipe repair in Central FL
CaptTCB wrote:

Yes. The contractor would have to dig up those areas. There would be an inspection by camera first to determine where those areas are and the hole would be relatively small as the camera measures the distance as it procedes down the sewer.

The contractor that installs the sleeve also would use the camera to record all openings to the main line befor the placement of the sleeve after installation is complete a robot is sent thru the new lining starting at the far end it cuts the openings as recorded at the start and removes them as it exits.

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