Sewer and Drain Relining

Sewer and Drain ReliningRelining in the context of sewer rehabilitation can be defined as the process of repairing a damaged sewer pipeline by inserting a liner coated with resins that is expanded into the damaged pipe to create a lining within the pipe.

The Process

A resin-saturated felt tube made of polyester, fibreglass cloth or any of a number of other materials suitable for resin impregnation, is inserted or pulled into a damaged pipe. It is usually done from the upstream access point (manhole or excavation). It is possible to insert the liner upstream (e.g. from the downstream access point) but this carries greater risk. It is possible to install a liner from the downstream access point, upstream to a blind end; however, this carries the highest risk of all the CIPP installation methods. CIPP is considered a trenchless technology. Little to no digging is involved in this trenchless process, making for a potentially more cost-effective and less disruptive method than traditional “dig and replace” pipe repair methods. The liner can be inserted using water or air pressure. The pressure required for insertion can be generated using pressure vessels, scaffolds or a “chip unit”. Hot water, UV light, ambient cured or steam is used to cure the resin and form a tight-fitting, jointless and corrosion-resistant replacement pipe. Service laterals are restored internally with robotically controlled cutting devices in the larger-diameter pipe. Smaller diameters (100 mm) can be opened remotely using smaller reinstating (reinstalling?) devices designed for small diameter pipe. The service lateral connection can be sealed with specially designed CIPP materials. The resin used is typically polyester for mainline lining and epoxy for lateral lines. Since all resins shrink (epoxy resins shrink far less than poly and vinyl ester versions) and it is impossible to bond to a sewer that has fats, oils, and grease an annular space exists between the new CIPP liner and the host pipe. The annular space exists in all installations just some are larger than others and depending on the severity may need additional rehabilitation. There are multiple ways to prevent water from tracking in the annular space and entering back into the waste stream including: water swelling material (hydrophilic), lining of the entire connection and host pipe with a continuous repair (YT repair) gaskets, and point repairs placed at the ends of the host pipe and at the lateral connections.

Advantages

As a trenchless technology, CIPP does not require excavation to rehabilitate a pipeline that is either leaking or structurally unsound. Depending upon design considerations an excavation may be made, but the liner is often installed through a manhole or other existing access point. Anything larger than 60 inches must be excavated in order to install. Liner is installed as it is wet out on site in these instances. In the case of sewer lines, lateral connections are also restored without excavation via a remote controlled device that drills a hole in the liner at the point of the lateral connection. If larger than 24″ and it is safe to do so someone will reinstate laterals by hand. CIPP has a smooth interior and no joints. While CIPP can repair a pipe with bends, special design considerations must be taken into account to prevent wrinkling and stretching. CIPP can effectively reduce infiltration and leaks in pipeline systems without digging.


Get A Free Estimate

We are more than happy to give advice on which solution is most suitable for your needs. Why not ask us to view your property and discuss the various options with you now. Our advice is free!

Need Sewer or Drain Relined? Contact Us Today!

•• A Message to Our Customers About COVID-19

Your family’s comfort and safety are our team’s most important focus. In our area and around the country, public health and safety is on everyone’s mind. We would like to do our part to ease any concerns you may have.
Here are some precautions that we are taking at VIP Sewer and Drain Services in order to continue to provide you with the best service:
Our employees are like family. We allow everyone ample time off work to care for themselves and their families in a time of illness. So, rest assured that we would NEVER send an ill technician to your home.

As part of our normal routine, all of our technicians wear shoe covers to keep your home clean and prevent any outside contaminants from entering your home. We are now making sure our technicians are wearing mask, and gloves before entering your home.
Our plumbers will also respect your space and keep a safe distance while working at your home or business.

When you call in, our office staff will be asking if anyone in the home has a fever, been diagnosed or had exposure to the virus. We need to know so that we can be proactive with our team’s response and level of protection.
We are giving our team members facts about COVID-19 and reminding them to follow simple, but effective steps to keep them safe such as frequent hand washing.

We will take credit card payments or can send you the invoice to your email with a link to pay online.
( Checks and Cash still accepted )