- The clearance needed between the host pipe inner diameter and the new pipe outer diameter will depend on the condition and alignment of the host pipe, but should not be less than 2 inches, as a general rule of thumb.
- The host pipe should be surveyed prior to design and any sliplining operation, including video using a CCTV camera that is pulled through the entire pipeline, as-recorded information regarding the pipeline, and actual field surveys.
- The pipe can be pushed or pulled into the host pipe, depending on layout room and alignment, using common construction equipment of the industry.
- Once the new pipe is installed within the host pipe, the area between the two conduits should be treated to eliminate the annular void space. This may include grouting, filling with blown sand or flyash, or some other media to provide some restraint, side support for the new pipe and increase ring stiffness.
- Utlilizes existing alignment - avoids concerns about overcrowded utility corridors and costly inadvertent construction hits that are common with open trench construction.
- Sliplining, because you are inserting a smaller pipe into a larger one, generally reduces the flow area of the host pipe, depending on the original condition of the host pipe. If more flow is required than can be achieved with sliplining, another installation methodology, such as pipe bursting, can be evaluated.
Fusible PVC® with Annular Space Grouted
- Maximum Flow Area: Fusible PVC® generally offers the largest internal diameter in a slipline material. In addition, Fusible PVC® does not utilize bells for connections, which allows for a larger nominal diameter pipe to be installed inside a given host pipe diameter.
- Standard Fittings: Fusible PVC® utilizes standard mechanical joint fittings. No special fittings or equipment are required for connections. As a result, Fusible PVC® is easy to connect to and maintain.
- Lower Material Weight: Fusible PVC® will have a lower overall material weight than other pipe systems. This means that equipment costs may be lower to install Fusible PVC® and/or the allowable section lengths required to install the pipe may be longer.
- Safe Pulling Allowance: Fusible PVC® has a safe pulling allowance that is significantly greater than that of most other pipe systems.
- Immediate Reconnections: Fusible PVC® may be reconnected to a system immediately after installation, with no "material relaxation time" required.