A Los Angeles sewer pipe lining installation should be performed by a licensed BBB accredited plumbing company that follows a specific set of instructions to get the job done right the first time.
Coast to Coast Plumbing technicians are trained to follow certain steps to ensure the sewer pipe lining installation conforms to industry best practices. We use the best “trenchless” pipe lining equipment and materials to complete a sewer pipe lining installation.
Curious homeowners will ask us lots of questions before and during the sewer pipe lining installation process because this sewer replacement method will cost thousands of dollars. We are always happy to provide answers.
Los Angeles Sewer Pipe Lining Installation Guide Steps
We hope our guide’s step-by-step pictures and short descriptions helps Los Angeles homeowners better understand the sewer pipe lining process, and how they are required by law to maintain their lateral sewer lines.
We illustrate the most common type of sewer pipe lining installation we accomplish weekly in our Los Angeles plumbing service areas.
- Installing a 6″ Perma-Liner™ pipe into a homeowner’s damaged lower lateral sewer line extending 27′ from their property line to the city’s main sewer line located under the city street
The video camera inspection detected massive tree root intrusion causing sewer pipe offsets and cracks.
1. Dig and prep for sewer pipe lining installation
After we locate the precise location where the homeowner’s 6″ clay lower lateral sewer line connects to his 4″ metal upper lateral sewer line, we cut the grass in 2-3 small sections leaving a few inches of dirt so the the grass does not die during the sewer pipe lining process.
We then dig down 5′ to 6′ until we expose the area surrounding where the lower lateral and upper lateral are connected together by a drain fitting (6×4 connection).
We separate the pipes using special cutting tools, like snap cutters on the lower lateral to provide a clean circular 6″ diameter with no cracks or splits.
This ensures the 6×4 drain fitting can be reinstalled with a tight and secure fit after the Perma-Liner™ pipe has been installed.
2. Use hydrojetting method to clean sewer line
Once the lower lateral sewer line is exposed, we use a sewer cleaning method called hydro jetting.
One tech inserts the jetter hose connected to a special head fitting inside the sewer pipe, while another tech controls the jetting machine’s water pressure delivery.
Nothing compares to the powerful cleaning action of hydrojetting! The root rat head fitting or jetter has tiny pin holes that spray out water at thousands of pounds of water pressure per second.
In this instance we use 3,000 pounds of water pressure (PSI).
The tech is very careful to control the back-n-forth motion of the jetter as it pulls itself further down the sewer line.
After years of experience hydrojetting sewer lines, he can just feel when the jetter has thoroughly cleaned a section of the pipe before allowing it to continue further.
It is crucial the sewer line has been cleaned of all debris before the Perma-Liner™ pipe is installed. Even the faintest trace of roots or debris clinging to the surface could result in cracks and leaks when the Perma-Liner™ pipe cures inside the line.
3. Final inspection before sewer pipe lining preparation
To make sure the sewer pipe is 100% clean of tree roots, we will perform a final video camera inspection before preparing for sewer pipe lining.
No tree roots or dirt are allowed on the pipe’s surface or else the entire Perma-Liner™ cure process can be ruined.
As a fail-safe redundancy measure, we require two techs observe the camera inspection results findings before proceeding.
4. Measure Perma-Liner™ pipe, calibration tube and pull tape
First, our sewer pipe lining techs measure the necessary amount of Perma-Liner™ pipe that will be inflated inside the damaged lower lateral sewer line. In this instance, the exact length is 27′.
Second, they measure the calibration tube (blue balloon) which has to be one foot longer than the Perma-Liner™ so it can seal properly with no bumps or ridges.
Third, they tie the yellow pull tape at the end of the calibration tube so it can inflate inside the Perma-Liner™ and hold the necessary 10-15 pounds of air pressure.
Once the Perma-Liner™ pipe has dried fully inside the sewer line, they pull the tape to remove the calibration tube (blue balloon) inside the line through the inversion head.
5. Remove air from Perma-Liner™ pipe
Using a vacuum manifold, our tech will attach PVC reducers to the Perma-Liner™ pipe to remove the air inside it.
No air pockets can be present when the resin is poured inside it. This ensures the resin will harden to its full potential and create a strong fiberglass pipe inside the sewer line.
6. Connect inversion head to 1st inversion hose
The sewer pipe lining process involves two inversion hoses (orange delivery tubes).
The 1st inversion hose holds the blue calibration tube and yellow pull tape (shown here). The 2nd inversion hose houses the Perma-Liner™ pipe (shown in Step 8). Both have openings for 90° fittings called inversion heads.
Here our techs connect the inversion head to the inversion hose that holds the calibration tube and pull tape.
7. Mix and pour resin into Perma-Liner™ pipe
Mixing the resins is not a guessing game. It takes a complicated math formula to calculate exactly how much resin you will need for the Perma-Liner™ application. When the resins are mixed, a powerful chemical reaction occurs that produces heat which causes the resin to harden.
Our sewer pipe lining techs use a new clean traffic cone to pour the pre-made resin into the Perma-Liner™ pipe. They need to work quickly because the resin is beginning to harden.
8. Roll and insert Perma-Liner™ pipe into 2nd inversion hose
Using a special rolling machine, our tech rolls the Perma-Liner™ pipe to soak up the resin evenly. Technically we call this step “impregnating the pipe”.
Our tech then inserts the Perma-Liner™ pipe into the 2nd inversion hose through its inversion head. He will lubricate the liner’s surface with either soap or vegetable oil so it shoots down the sewer line smoothly.
9. Shoot Perma-Liner™ pipe into sewer line
After inserting the Perma-Liner™ pipe into the inversion hose, he will seal the other opening with a fitting cap that has a pressure gauge connected to an air hose.
He lowers the inversion hose into the hole where another tech lines up its 90° inversion head with the lower lateral sewer line opening.
Adjusting the gauge to deliver the right amount of air pressure, he “shoots” the Perma-Liner™ into the line.
10. Shoot calibration tube into Perma-Liner™ pipe
After shooting the Perma-Liner™ into the sewer line, he will immediately lower the other inversion hose that holds the blue calibration tube and yellow pull tape.
The tech inside then “shoots” the calibration tube inside the Perma-Liner™ pipe. He will adjust the air pressure between 10-15 psi so it inflates like a balloon.
11. Remove calibration tube via pull tape
After the Perma-Liner™ pipe has fully cured or hardened inside the sewer line after 1-3 hours, our tech will need to remove the blue calibration tube.
He accomplishes this by pulling the yellow tape through the inversion head. As mentioned in Step 4, the yellow tape was securely tied to the blue calibration tube.
12. Inspect surface of Perma-Liner™ pipe after installation
Before the Perma-Liner™ installation, the camera inspection revealed all the sewer line’s joints were offset due to tree root intrusion.
After the Perma-Liner™ installation, our techs perform another camera inspection to make sure its entire surface length is clean and smooth with no bumps, cracks, leaks or imperfections.
13. Reattach 6×4 connection and refill hole
After the final camera inspection, our techs will reattach the 6″ lower lateral sewer line to the 4″ metal upper lateral sewer line with a 6×4 drain fitting.
Then they refill the hole with dirt and grass sections.