ACP - Sag Correction System for Sewer Pipes
The Sag Correction System by Advanced Construction Products is engineered to rectify low spots or sags in PVC sewer lines without excavation. This patented system operates from within the pipe, using a combination of lift pressure and high-frequency vibration to elevate the pipe back to its proper alignment. The system is assembled via manholes and includes a pneumatic vibrator that, with centrifugal force, moves granular bedding material beneath the pipe, thus lifting it. Rubber isolators and air suspension mechanisms minimize vibration transfer, enabling precise adjustments. Capable of correcting sags of varying lengths and depths, this system is versatile across different environments and can be adapted for larger pipe diameters using interchangeable pipe adapters. For situations with no groundwater, additional water can be provided to aid bedding material flow and aid manual pipe positioning.
- Removes sags or low spots in PVC sewer lines from inside the pipe
- Excavation is not required. Costs are at a fraction of the price!
- Our machine is very versatile with multiple size-pipe adapters: 8", 10", 12", 15" and 18".
The three sections of the sag remover are assembled inside a manhole. Two air hoses are connected. One to supply a pneumatic powered vibrator and one to power the lift mechanism.
After the machine is positioned in the sag, lift pressure is applied. This forces the center section, which contains the vibrator, against the top of the pipe. The combination of lift pressure and vibration will raise the pipe.
Some of the lifting power comes from the centrifugal force of the vibrator. The rubber isolator pads at the ends of the machine and the air suspension of the lift mechanism prevents this vibration energy from transfering downward.
Intense high frequency vibration allows the surrounding granular bedding material to flow from above the pipe to underneath, as the pipe is lifted.
Sags of any length can be removed by moving the machine in increments and lifting along the length of the sag. Deeper sags will require multiple passes.
With most bedding materials, it will likely be necessary for the material to be wet to be able to flow underneath the pipe.