An Alberta government building was faced with having to close down its antique, manual elevator when a vitrified clay (VCP) sewer drain pipe that was partially embedded in the elevators foundation cracked. The high cost of the sewer pipe repair while keeping the elevator foundation intact was too much for the facility to justify keeping the elevator. Revive Pipes saved the elevator by installing a cured in place pipe (CIPP) structural liner inside of the cracked wastewater sewer pipe. We saved the facility over $100,000, which allowed them to keep their charming, antique elevator.
Staff in the historic building realized there was a problem when they started to smell nasty sewer gases in the area around the antique elevator. Upon further inspection, it was revealed that raw sewage water was leaking from the pipe and collecting in the bottom of the elevator shaft. This was a dangerous situation with potential for Legionella and other types of harmful bacteria and molds to grow. In addition, inspections revealed that some of the pipe that was upstream of the clay pipe in the elevator foundation was extremely deteriorated cast iron sewer pipe that was corroded, cracked and collapsed in places.
The traditional excavate, demolish, replace and repair approach was made much more difficult because of the accessibility of the pipe. Over time, additions to the facility had been built and the area under which the sewer pipes were routed had been closed off in a courtyard that was surrounded on all sides by sections of the building. Excavation was required to access much of the pipe that was buried ten (10) feet below the ground, however no excavation equipment could drive into the courtyard as it had been closed off by the additions to the building.
To perform a traditional sewer pipe replacement, a very costly and invasive repair would have involved:
Hiring a very large crane to lift some excavating equipment over a section of the building into the courtyard or hiring a specialized hydro vacuum excavation service with a long vacuum boom line to reach over a section of the building into the courtyard.
Excavating ten (10) feet down to the building foundation and sewer drain pipe to be replaced.
Shoring of the excavation for safety and to prevent the walls of the trench from collapsing.
Replacement of the cracked, corroded and damaged sewer pipe in the courtyard.
Backfilling and compacting of the dirt in the trench
Replacement of shrubs, grass and sidewalk removed for the trench
Hiring a structural engineer to evaluate the best alternative in removing the drain pipe embedded in the elevators concrete foundation.
Installation of bracing or additional foundation supports in the elevator shaft
Saw cutting and jack hammering of the concrete surrounding the vitrified clay (VCP) sewer pipe
Installation of a new sewer pipe through the elevator shaft to replace the old sewer pipe
Saw cutting of concrete slab floor for one section of sewer inside of the building
Jack hammering and removal of the concrete flooring
Digging out of the cast iron sewer pipe under the slab
Replace the cracked, corroded and collapsed cast iron wastewater pipe
Filling back in the dirt and compacting it
Pouring new concrete
Revive Pipes used 4 different existing access points in the sewer drain system to rehabilitate the existing sewer pipe with our non-invasive Cured in Place Pipe (CIPP) structural lining service. Three (3) access points used were cleanouts in the system and one (1) access point used was a manhole approximately three hundred (300) feet downstream.
We installed two sections of liner in total. One section started in a PVC pipe that connected to the cracked clay pipe that ran through the elevator shaft foundation. This structural liner section restored the strength to the clay sewer pipe and sealed the crack in the pipe, stopping the sewer odour from permeating the air in the facility and preventing raw sewage from accumulating in the bottom of the elevator shaft.
The second Cured in Place Pipe (CIPP) structural liner we installed was through a section of severely deteriorated cast iron drain pipe that connected to PVC pipe on both ends. The corroded cast iron had basically disintegrated at points so there was no top to the pipe and in other points had heavy scale and corrosion buildup, cracks and small holes. Revive Pipes was able to install a new Cured in Place Pipe (CIPP) inside of the old pipe, sealing the system to prevent sewer gas odours from wafting through the facility and keep sewage from flowing underneath the concrete slab through the cracks and holes in the cast iron wastewater pipe.
Revive Pipes specializes in relining complex sewer pipe configurations inside of buildings with our non-invasive Cured in Place Pipe service. We can line cast iron, clay, PVC, ABS, asbestos concrete, No-Corrode or any other type of sewer drain pipe.
Health & Safety | Revive Pipe Restoration Inc is committed to health and safety and holds a Certificate of Recognition (COR) from the Alberta Construction Safety Association and is a Partner in Injury Reductions (PIR) with the Workers Compensation Board of Alberta (WCB). Our workers are trained in worksite health and safety, relevant OH&S legislation, Workplace Hazardous Materials Information System (WHMIS) and Revive Pipe Restoration Inc's Safe Work Practices (SWP) and Safe Job Procedures (SJP).
Our mission is to have all workers return home from work every day safe and in good health.
NuFlow Installer | Revive Pipes has been Nu Flow's exclusive Nu Drain, Cured in Place Pipe (CIPP) installer in Alberta for the better part of the past decade. The high profile sewer rehabilitation projects that we have completed inside of buildings in Edmonton and Calgary have forged Revive Pipes reputation as an elite installer in Nu Flow's worldwide network of licensees of the Nu Drain system.
Nu Flow has been a world leader in developing and manufacturing patented Cured in Place Pipe (CIPP) systems that are uniquely suited for rehabilitating wastewater systems inside of buildings. Sewer systems inside of buildings are significantly more complex than systems outside of buildings for many reasons including:
Smaller pipe diameter
Multiple bends in the pipe
Multiple branches of varying sizes connecting to the pipe being lined.
The area above and adjacent to the pipe is occupied by people living or working
Nu Flow developed a patented Cured in Place Pipe (CIPP) liner assembly that uses a pull-in-place (PIP) installation method unlike most Cured in Place Pipe (CIPP) assemblies that use an inversion installation method. The pull-in-place system used in conjunction with Nu Flow's patented Nu Drain system allows us to install liners in many situations without excavating floors or demolishing walls to create access points.
The Nu Flow, Nu Drain system has the flexibility to also be installed from a single access point in some situations when a second access point is not available. Nu Flow Cured in Place Pipe (CIPP) liners can be pushed into place in situations where Cured in Place Pipe (CIPP) inversion contractors would likely have to create an excavation point for their access. Access points that we can install Nu Flow Cured in Place Pipe (CIPP) liners from include cleanouts, roof vents, toilet closet flanges and manholes.
The Nu Flow system can also form around ninety (90) degree elbows and bends without stretching and thinning of the lining material in the outer radius of the liner. This characteristic ensures the structural integrity of Nu Flow's Nu Drain liner is maintained throughout the bend, unlike an inversion liner.
The pull-in-place (PIP) installation method allows Nu Flow liners to be accurately placed, often with an inch of accuracy in a sewer pipe system. Cured in Place Pipe (CIPP) inversion systems suffer from inaccuracies and uncertainty in where liners will terminate in the sewer pipe. Because of the stretching fabric used with inversion lining and the difficulty in measuring liner distances around bends, inversion liners will often terminate at an unintended spot in the sewer system. This can leave part of the sewer pipe unlined or the inversion liner could go too far and block a branch connection or travel into a main pipe, blocking the main sewer line. Revive Pipes uses Nu Flow's patented Nu Drain system in these situations to remove the uncertainty of where the liner will terminate and ensure the sewer pipe is lined properly.
Nu Flow Cured in Place Pipe (CIPP) liners can be used in point repairs that are hundreds of feet from an access point on either side of the section of sewer in need of repair. In situations where all of the pipe except for a small section is in good condition, an installation of a Nu Flow spot repair avoids disruptive excavation or demolition.
As the exclusive Nu Flow, Nu Drain licensee in Alberta for nearly the last decade, Revive Pipes has the experience and technical ability to install Nu Flow Cured in Place Pipe (CIPP) in complex sewer configurations inside of buildings.