Sewer Pipe Relining
So What Exactly Is Sewer Pipe Relining?
The new inner pipe lining is a long special fabric tube that has been wet out or saturated with a resin that hardens by itself within 2-4 hours. The new inner pipe only reduces the pipe diameter by about 5%, so flow is not affected, and the pipe lining material has a 100-year engineered life and typically comes with a 50 year warranty.
If you sewer system keeps getting backed up, traditional methods of unclogging your sewer line will only give you a temporary fix. Usually the culprit of damaged and blocked sewer lines are from tree roots and debris that can crack the pipes and find their way into you sewer lines causing blockages or complete breaks in your sewer system. By getting a camera inspection your local RooterNOW® of Charleston, SC plumber can see exactly what the problem is and will know the best way to repair you sewer line.
After your RooterNOW® of Charleston, SC plumber has inspected your sewer system and determines that your pipe is damaged first step is to clear out the pipe. This can be done through water jetting or hydro-jetting which forces water through the pipe to eliminate all clogs and debris. If this isn’t an option, any obstructions will be removed through other methods. Once the pipe is clear, then the relining begins. Instead of removing the old pipe and installing a new one, a new pipe will be installed inside the old one.
Although some digging may be required it’s not to the extent it used to be. The latest technology is called trenchless sewer repair which means we can repair or even replace your sewer line completely without having to dig up your yard.
How Is Sewer Pipe Lining Installed?
First the sewer pipe is cleaned with a high pressure water jetter that removes all roots and sludge and a sewer pipe video inspection is made to determine the length of pipe that has to be relined. Then a long special fabric tube is cut to the correct length and the self hardening part A and part B epoxy resins are mixed and used to completely saturate the fabric tube.
The fabric tube is then either pulled into the broken pipe or air pressure is used to shoot the liner into the pipe (see video below). Then the fabric tube is inflated with air for 2-4 hours while the resin hardens.
After the new liner is fully cured, a final pipe video inspection is made for quality control.
How Strong Is The New Inner Pipe?
The final new inner pipe is designed for load-bearing pipes that are located under roads, railways and building footers. If, for example, a section of clay or cast iron sewer pipe is missing, the new inner lining is designed to be a stand-alone pipe. The video on the right side of this page (VIOLENTLY) demonstrates the strength of sewer pipe lining – check it out.
Pipe lining is the modern alternative to pipe replacement!
- In fact, pipe lining IS pipe replacement
- The new lining that is installed inside the old pipe is as strong as new pipe
- Has a 50-year warranty
- Only reduces the internal diameter by 5%
- Only takes 3 hours to install
Let’s not forget, since pipe lining requires no excavation, it is cleaner, less invasive and much faster than repiping the old-fashioned way.
Which Pipes Can Be ReLined?
Pipelining, also known as Cured-In-Place Pipe (CIPP) is used for clay pipe replacement, cast iron pipe repair, HVAC pipe repair, storm drain replacement, golf-course overflow drainage pipes, drinking water lines, and sewer pipelining of sanitary sewer pipe.
CIPP Process – A resin-saturated felt tube made of polyester is inverted or pulled into a damaged pipe. It is usually done from the upstream access point (manhole or excavation). It is possible to invert the liner upstream (e.g. from the downstream access point) but this carries greater risk. It is possible to install a liner from the downstream access point, upstream to a blind end however this carried the highest risk of all the CIPP installation methodologies. Little to no digging is involved in this trenchless process, making for a more environmentally friendly method than traditional “dig and replace” pipe repair methods.
The liner can be inverted using water or air pressure. The pressure required for inversion can be generated using pressure vessels, scaffolds or a “Chip unit”. Hot water, UV light, ambient cured or steam is used to cure the resin and form a tight-fitting, jointless and corrosion-resistant replacement pipe. Service laterals are restored internally with robotically controlled cutting devices. These can be sealed with additional seals into the lateral connection (Lateral Junction Repair). The rehabilitated pipe is then inspected by closed-circuit television (CCTV). CIPP is considered a trenchless technology.
Does The Whole Pipe Have To Be Lined?
No, especially for clay pipes, only the cracked pipe or root intrusion area is relined. This “sectional repair” is also called a “point repair” and costs a fraction of what relining the whole pipe would cost.
But usually cast iron pipes in residential dwellings and apartments are all of the same age and have experienced the same corrosive environmental conditions, so when one portion of the sewage pipe starts leaking of backing up, usually the rest of the cast iron pipe has to be lined too.