Underground Services LTD


Mar-Tech CIPP Services

An incredibly effective way of extending the life of any sewer main is to reline the pipe using a cured-in-place liner. This is a stand-alone structural pipe that will take the place of the existing (host) pipe.

Lateral Lining

Service lateral relining is a process in which the existing service lateral is relined with a resin impregnated liner, typically from property line to the main. The relining is used to repair cracked pipes, worn pipes, root infested pipes, infiltration and exfiltration, and is typically designed, like new pipe, to last 50 years. This no-dig method has a much lower carbon foot print than digging the pipe up and replacing it, plus typically the crew are in and out in a couple of hours with very little social impact on the neighbourhood.( Engineered designs signed and sealed by a profession al engineer can be provided upon request.)

We use 2 different systems for relining service laterals.

1. Mar-Tech Liner. The first system we started using was called Mar-Tech Liner. It was a liner that was wet out with an ambient cure polyester resin on site, placed on a bladder and pulled into place, inflated and then left to cure. (typically 1-1 ½ hours). With this system we had to have an open pit to insert the liner. We could do 100mm-150mm laterals up to 20 meters in length.

2. Formadrain. The second system we are presently using is from Formadrain. Here we use an epoxy resin, and the liner is either wet out on site or in the shop, placed on a bladder, pulled into the line through an Inspection chamber and then steam cured. (typically 1-1 ½ hours). With this system we can reline 100mm and 150mm laterals with lengths up to 50 meters long.

All these systems are a good alternative to digging and replacing your lateral.

Note: With all these systems it is important to know there are limitations. Things like crushed pipe, tight bends, or grade issues all have an impact on whether this is a suitable repair method.


Whats That Odour

For more information on identifying odours.. Whats-That-Odor.pdf.

Mainline Lining

A cured-in-place pipe (CIPP) is a trenchless rehabilitation method used to repair existing pipelines. It is a jointless, seamless pipe lining within an existing pipe. As one of the most widely used rehabilitation methods, CIPP has applications in sewer, water, gas, and chemical pipelines ranging in diameter from 0.1 to 2.8 meters (2–110 inches).

The process of CIPP involves inserting and running a felt lining into a preexisting pipe that is the subject of repair. Resin within the liner is then exposed to a curing element to make it attach to the inner walls of the pipe. Once fully cured, the lining now acts as a new pipeline.

Mar-Tech CIPP Image
Mar-Tech CIPP Image
Mar-Tech CIPP Image
Mar-Tech CIPP Image

Point Repair

The pipe is cleaned via flushing and inspected for suitability. The lining crew utilizes a very small footprint at each end of the main, with full traffic control provided by specially trained Mar-Tech crews. The manholes rarely require more than the manhole lid being removed, however for larger mains, the manhole “donuts” may need to be excavated and removed.

The liner is prepared at the Mar-Tech facility the day before the liner is to be installed and stored in a refrigerated area. The liner arrives on site, packed in ice and has an appearance similar to a flat felt liner. The liner is then inserted into the main through a special piece of equipment known as a “shooter” and forced into place using air or water pressure.

Once inserted into the sewer main host pipe, the resin impregnated felt is pushed against the walls of the host pipe and the liner is now on the inside due to the inversion of the liner upon installation. The liner “day lights” at the far end manhole and a metal mold is placed around the air-filled liner to create a sample for testing.

Air/steam is then inserted into the liner until the required curing temperature is achieved. As soon as the temperature has reached the optimal heat levels, a formula is applied to achieve the proper curing time – often two or more hours. Once the liner has cooled down, the ends are removed utilizing a hand saw with minimal cleanup. The lining process can generally be accomplished within an 8-hour day.