6 Best Practices In CIPP Rehabilitation

by Sudarsan Chakraborty

The cured-in-place-pipe (CIPP) rehabilitation process is a less-invasive procedure you can use to repair your piping systems, such as sewers. Here, you don’t have to remove the damaged pipes; you just insert a lining into the already existing pipe. You’ll then harden the lining; after which, it’ll act as your current piping system. 

You need to consider a few things as you do the CIPP lining for the procedure to be effective, and these are all discussed in this article. So, read on!


Before starting any CIPP procedure, you need to inspect your existing piping that requires repair.

Through an inspection, you’ll see the type of work needed, the diameters, and the length of the pipe to be repaired, among others. These small but essential details will help you plan your CIPP rehabilitation process properly. 

With an inspection, you’ll ensure that you get all the materials and equipment right for an effective repair process to your piping.


As you utilize your piping system over the years, there’s a likelihood of dirt and grease accumulation on its inner surface. Therefore, for the efficient installation of your CIPP lining, you need to remove all the grime.

You can utilize pressurized water for this process. If you skip this step, the bumps on the pipe will also appear through your newly-installed CIPP lining. Although this doesn’t affect the procedure or efficacy of your lining, it’ll affect how you use the pipe. How?  The bumps will interrupt continuous water flow, which affects the pressure. When it comes to piping, you want a system that’ll deliver water to its destination at high pressures to prevent excessive water standing.

Also, cleaning will help to reveal any pipe damage that you didn’t see during the inspection. This means that you need to make it a habit to conduct another inspection after the cleaning process. By redoing the inspection, you’ll be able to choose the most essential CIPP rehab solutions for your piping.


For your CIPP lining to be effective in its performance, it must be water-tight. You can achieve this property by saturating the CIPP lining with resin. The resin can either be made from polyester, vinyl, or epoxy. The most commonly used resin types for sewers are polyester and vinyl. 

You can either perform saturation in a facility off-site or on-site. If done off-site, you need to store the lining in cold temperatures to slow down the curing process. Once curing happens before insertion into the pipe, it’ll become nearly impossible to line your pipe. 

As you saturate your lining, you must expel any air beforehand. The air can prevent the resin from reaching the end of the lining, especially if the air is pressurized.


Inflating is where you now insert your lining into the old piping. You can either use pressurized water or air. With water, once it reaches the end of the lining, it’ll circle back to your entry point or the source of the water. When using air, it’ll be released underground once it reaches the end of the lining.

You need enough constant pressure for efficient inflation, which the manufacturer will give as the minimum inversion head.  

With proper inflation, you’ll ensure there’s tight contact between the old pipe and the lining. Failure to do this, once the resin cures, it’ll form a solid blockage or bump that might lead to pipe clogging or extended water standing. 


Curing aims at hardening your resin-filled lining. Here, there are various criteria that you can use—ambient, heat, or UV light.

Ambient curing is where the lining hardens on its own without any assistance. This procedure is effective if you utilize epoxy resin. Since this process can happen rapidly if there’s no temperature control, you need to install the lining as quickly as possible.

For heat curing, you can either utilize hot water or steam, which you’ll fill through the vacuum of the CIPP lining to quicken the hardening process.

With the UV light process, you first need to fill the lining with air under high pressure, then pass a UV light through the lining. 

For effective curing, you need to ensure the curing agent reaches the end of the CIPP lining. 


Cooling is an essential step in your CIPP rehabilitation, especially if you utilize the heat curing methods. You want to reinstate the temperatures of the CIPP lining to room temperature. 

To cool your lining, all you have to do is pass cold water through after you’re through with the curing process. Cooling prevents shrinkage of your CIPP lining once you start utilizing it.


As seen, to ensure that your CIPP rehabilitation is effective, you only need to factor in minimal but crucial steps in the process. This article has highlighted these best practices; therefore, be sure to incorporate them in your rehabilitation process, and you won’t make errors. With this, the CIPP lining will serve for a long time efficiently.

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