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The Ultraliner Installation Process

Prior to insertion, Ultraliner PVC Alloy Pipeliner is shaped into a reduced form to assist in installation.
Once pulled through the pipeline, it is expanded tightly against the host pipe.

Ultraliner PVC Alloy Pipeliner installs quickly and easily, resulting in minimal community disruption. Typically, installing Ultraliner PVC Alloy Pipeliner only requires four to five hours plus time for lateral connection reinstatement, but generally results in no sewer service disruption to home owners. Additionally, modest equipment requirements result in limited traffic disruption and minimal disturbance to private property. Furthermore, although Ultraliner PVC Alloy Pipeliner is generally manufactured to order, its unique ability to conform to the host pipe dimensions will permit the use of pipeliner from inventory so that our local licensed installers can rapidly respond to your emergency needs. Ultraliner is there when you need us, and then we're quickly out of your way.

1. Ultraliner PVC Alloy Pipeliner is coiled on reels providing ease of handling for the installer.


4" to 12" Ultraliner PVC Alloy Pipeliner is coiled in a flat shape and folded during insertion;
whereas 15" and larger Ultraliner PVC Alloy Pipeliner is coiled in an "H" shape.

2. The reel of Ultraliner PVC Alloy Pipeliner is heated with steam prior to insertion.



3. The heated Ultraliner PVC Alloy Pipeliner is pulled into a prepared host pipe.


[Click Here to see a brief video (230kb; AVI format) of a liner being inserted.]

A winch is used to pull the pipeliner off the reel and through the host pipe. The flat pipeliner is folded as it enters the host pipe, whereas the "H" shape pipeliner is already in a reduced cross-sectional area. The Ultraliner manufacturing and installation methods reduce the cross-sectional area of the pipeliner by almost half. The reduced size, along with Ultraliner PVC Alloy Pipeliner's high abrasion resistance and very slick surface, allow it to be pulled into a pipeline through an existing access point, such as a manhole, without trauma to either the pipeliner or the host pipe. The pipeliner is pulled through the host pipe at a speed of up to 40 to 50 feet per minute depending upon field conditions.

Because Ultraliner PVC Alloy Pipeliner is pulled along the invert of the host pipe (as opposed to being inverted with 360 degree contact with the host pipe), contact with crushed sections in the crown of the pipe can be avoided, thereby reducing the risk of collapsing an extremely distressed host pipe during pipeliner insertion. [This is one of many reasons why Ultraliner PVC Alloy Pipeliner is the preferred choice for rehabilitation of extremely deteriorated host pipes.]

4. The Ultraliner PVC Alloy Pipeliner is plugged and is again heated with steam.

(upstream and downstream)

Once inserted, the upstream end is plugged tightly against the host pipe and connected to a steam hose. The pipeliner is then heated sufficiently to relax the pipeliner from the insertion pull, thereby preventing post-installation longitudinal shrinkage. After the relaxation period, the downstream end is plugged in preparation for expansion of the pipeliner.

5. The Ultraliner PVC Alloy Pipeliner is expanded with steam and air pressure.


With the pipeliner plugged at both ends, the pressure and temperature can be controlled at the "B station" to properly heat and expand the pipeliner tightly against the host pipe in a thermoforming process similiar to "blow-molding."

The installation temperature, together with the radial stretching of the pipeliner, are sufficient to reset the PVC Alloy's "memory" to the new size and shape it has assumed, and to allow the material to "relax." As a result, the installed Ultraliner PVC Alloy Pipeliner will not attempt to return to its original size or shape after it has cooled.

6. The Ultraliner PVC Alloy Pipeliner ends are trimmed.


After the pipeliner has cooled properly, pressure is relieved and the flared ends of the Ultraliner PVC Alloy Pipeliner are trimmed at least 3 inches from the end of the host pipe.

7. Immediately after the pipeliner has been installed, the lateral connections are robotically located and reinstated.


Lateral service connections are located and reopened using remote-controlled devices.
The unique Ultraliner PVC Alloy material is more ductile (less brittle) and relieves stresses more readily than typical PVC compounds, thereby avoiding cracking or shattering of the pipeliner when the services are reestablished.

The Ultraliner PVC Alloy Pipeliner forms a permanent, tight-fitting new pipe.

Lined Corrugated Pipe
(the visible rivets show how tightly the pipeliner fits)


Ultraliner PVC Alloy Pipeliner's tight fit against the irregular shape of the host pipe mechanically locks the liner in place throughout its service life and controls the potential for groundwater migration between the host pipe and the pipeliner.

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Rev: 5/8/2002