Everything to Know About Trenchless Pipe Lining Process & Guide

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Two Bob Oates techs displaying how the pipe lining process works

Pipelining is a no-dig method of restoring pipes that are leaking, cracked, or corroded due to a variety of reasons, such as tree root intrusion, aging, and blockages, among other things. If you are looking for an alternative to the traditional excavation method of sewer repair, consider trenchless sewer repair in Seattle, WA offered by Bob Oates Sewer & Rooter.

Trenchless pipe lining solutions have been around for decades, but not many would be familiar with how it’s done. If you’re considering this pipe rehabilitation method or have a scheduled pipe lining appointment coming up, then you’ve come to the right place. Here’s how we typically carry out our trenchless pipe lining service.

Acquiring Permits

While trenchless pipe repair and other similar services don’t entail extensive digging that could be considered as a full-on “construction”, a contractor would need to secure permits before starting the project. Bob Oates Sewer & Rooter makes sure that all necessary paperwork is complete before we proceed with the lining process.


Before deciding to do the trenchless pipe replacement, we’d have already done a thorough inspection to assess the condition of the pipes and determine whether the trenchless solution is indeed suitable.


We clean the pipe interior to prime it for the trenchless sewer replacement procedure, resulting in better adherence and optimal results.

Taking Measurements

Next, we take the pipes’ measurements to know how much liner mixture and pipe liner to use. The resin is then measured and mixed according to these measurements.

Resin Pouring

Our team then pours the resin mixture into the liner, thoroughly saturating the liner with the mixture.


The resin-saturated liner is loaded into an inverter, which flips the liner inside out so that the resin will now be on the outside, which will be the part that will adhere to the affected pipeline. We can now insert this inverted tube into the damaged pipe, utilizing air pressure in the process.


Using hot air or Blue light curing technologies, we are able to allow the epoxy liner to harden in place, leaving a final product that is stronger, durable, fast-flowing, and resistant to corrosion.

There is peace of mind when you have to worry less about your sewer system issues. For the best sewer pipe lining services, contact Bob Oates Sewer & Rooter today.

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CALL (206) 789-4944

Serving the Greater Seattle Area